JP6168545B1 - Sewage discharge method and sewage purification system - Google Patents

Sewage discharge method and sewage purification system Download PDF

Info

Publication number
JP6168545B1
JP6168545B1 JP2017082590A JP2017082590A JP6168545B1 JP 6168545 B1 JP6168545 B1 JP 6168545B1 JP 2017082590 A JP2017082590 A JP 2017082590A JP 2017082590 A JP2017082590 A JP 2017082590A JP 6168545 B1 JP6168545 B1 JP 6168545B1
Authority
JP
Japan
Prior art keywords
sewage
water quality
facility
water
quality management
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2017082590A
Other languages
Japanese (ja)
Other versions
JP2018178621A (en
Inventor
中西　茂樹
茂樹 中西
Original Assignee
株式会社ヴェルテックスジャパン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ヴェルテックスジャパン filed Critical 株式会社ヴェルテックスジャパン
Priority to JP2017082590A priority Critical patent/JP6168545B1/en
Application granted granted Critical
Publication of JP6168545B1 publication Critical patent/JP6168545B1/en
Publication of JP2018178621A publication Critical patent/JP2018178621A/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

【課題】放流許容水質を担保した浄化処理水を自然環境水域に放出することの信頼性をより高める。【解決手段】上水使用施設から排出される下水を取水して浄化するに当たり、放流許容水質判断に用いられる水質管理パラメータを付属浄化施設で浄化済み下水について指標計測器で計測し、計測水質管理パラメータが水質管理パラメータを満たす状況では、浄化済みの下水を自然環境水域に排出する。計測水質管理パラメータが水質管理パラメータを満たさない状況下においては、指標計測器より下流の流路切換弁により自然環境水域への排出を停止すると共に、浄化済み下水を、下水浄化処理施設に到る公共下水流路に流路切換弁から送り込む、または流路切換弁から付属浄化施設に循環させる。【選択図】図１An object of the present invention is to further improve the reliability of discharge of purified treated water with guaranteed discharge water quality to natural environmental waters. [MEANS FOR SOLVING PROBLEMS] When taking and purifying sewage discharged from a facility that uses clean water, water quality control parameters used to determine the quality of water that can be discharged are measured with an indicator measuring device for purified sewage at the attached purification facility, and the measured water quality management In situations where the parameters meet the water quality control parameters, the purified sewage is discharged into the natural environment water area. In the situation where the measured water quality control parameter does not satisfy the water quality control parameter, the discharge to the natural environment water is stopped by the flow path switching valve downstream from the index measuring instrument, and the purified sewage reaches the sewage purification treatment facility. It is sent to the public sewage channel from the channel switching valve or circulated from the channel switching valve to the attached purification facility. [Selection] Figure 1

Description

本発明は、上水を使用して生じる下水を排出する上水使用施設における下水排出方法と下水浄化システムに関する。   The present invention relates to a sewage discharge method and a sewage purification system in a sewage use facility that discharges sewage generated using the sewage.

工場、商業ビル、テナントビル、浴場施設、スーパー、スポーツクラブ、複合ビル等の商工業的な上下水使用施設に限らず、戸建ての一般住居や集合住宅といった上下水使用施設でも、浄化装置を備え付け、下水の自己浄化を図る下水排出手法が知られている（例えば、特許文献1）。   Not only commercial and industrial water and sewage facilities such as factories, commercial buildings, tenant buildings, bathhouse facilities, supermarkets, sports clubs, and complex buildings, but also water and sewage facilities such as detached houses and apartment buildings are equipped with purification equipment. In addition, a sewage discharge method for self-purification of sewage is known (for example, Patent Document 1).

特開２０１４−１２９２７号公報JP 2014-12927 A

近年では、上水使用施設周辺の地域住民のみならず、上水使用施設の所有者・使用者の自然環境に対する意識向上から、自然環境水域に実際に放流される浄化処理水の水質に対する関心も高まっている。このため、自然環境水域への放流が許容される放流許容水質となるまで浄化可能な浄化施設を用いたとしても、放流許容水質を担保した浄化処理水を自然環境水域に放出することの信頼性をより高めることが要請されるに到った。   In recent years, interest in the quality of purified treated water that is actually discharged into the natural environment is increasing from the awareness of the natural environment of the water supply facility owners and users as well as local residents around the water use facility. It is growing. For this reason, even if a purification facility that can be purified until it has an acceptable discharge quality that can be discharged into the natural environment water area, the reliability of releasing purified treated water that guarantees the allowable discharge water quality to the natural environment water area It has come to be requested to raise more.

本発明は、上述の課題の少なくとも一部を解決するためになされたものであり、以下の形態として実現することが可能である。   SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.

（１）本発明の一形態によれば、上水を使用して生じる下水を排出する上水使用施設についての下水排出方法が提供される。この下水排出方法は、以下の工程（１）〜（３）を備える。工程（１）では、前記上水使用施設から排出される前記下水を取水し、該取水した下水を、自然環境水域への放流が許容される放流許容水質となるまで浄化可能な付属浄化施設で浄化する。工程（２）では、前記取水した下水についての前記放流許容水質の判断に用いられる水質管理パラメータを、前記工程（１）で浄化済み下水について指標計測器で計測し、該計測した計測水質管理パラメータが前記水質管理パラメータを満たしているかを判定する。工程（３）では、該工程（２）で前記計測水質管理パラメータが前記水質管理パラメータを満たすとの判定が得られた状況において、前記工程（１）の前記付属浄化施設で浄化済みの下水を、前記自然環境水域に到る排水流路に排出する。更に、この工程（３）では、前記工程（２）で前記計測水質管理パラメータが前記水質管理パラメータを満たすとの判定が得られていない状況下においては、前記指標計測器より下流側に設けた流路切換弁により前記自然環境水域に到る排水流路への排出を停止すると共に、前記付属浄化施設で浄化済みの下水を、前記上水使用施設が属する自治体もしくは近隣の自治体が連携した広域連合が運営する下水浄化処理施設に到る公共下水流路に前記流路切換弁から送り込む、または前記流路切換弁から前記付属浄化施設に循環させる。   (1) According to one aspect of the present invention, there is provided a sewage discharge method for a water supply facility that discharges sewage generated using the water. This sewage discharge method includes the following steps (1) to (3). In the step (1), the sewage discharged from the water use facility is taken in an attached purification facility that can purify the collected sewage until it has a discharge-permitted water quality that allows discharge into a natural environment water area. Purify. In the step (2), the water quality management parameter used for the determination of the discharge allowable water quality for the taken sewage is measured for the sewage sewage purified in the step (1) by an index measuring device, and the measured water quality management parameter is measured. Determines whether the water quality management parameters are satisfied. In the step (3), in the situation where the determination that the measured water quality management parameter satisfies the water quality management parameter is obtained in the step (2), the sewage that has been purified in the attached purification facility in the step (1) is obtained. And discharged into the drainage flow path to the natural environment water area. Further, in this step (3), in the situation where it is not determined that the measured water quality management parameter satisfies the water quality management parameter in the step (2), the measurement water quality management parameter is provided on the downstream side of the index measuring instrument. Discharge to the drainage flow path reaching the natural environment water area by the flow path switching valve, and the sewage purified by the attached purification facility, in cooperation with the local government to which the water use facility belongs or a neighboring local government It is sent from the flow path switching valve to the public sewage flow path to the sewage purification treatment facility operated by the Union, or is circulated from the flow path switching valve to the attached purification facility.

この形態の下水排出方法では、水質管理パラメータを満たす放流許容水質まで実際に浄化された下水しか自然環境水域に排出されない。つまり、水質管理パラメータの測定結果が得られていない故に放流許容水質であるかが不確定な浄化済み下水を、自然環境水域に排出されないようにすることが可能となる。この結果、上記形態の下水排出方法によれば、放流許容水質を担保した浄化済み下水の自然環境水域への放出の信頼性をより高めることができる。また、上記形態の下水排出方法によれば、自然環境水域に排出する分の水量の下水を下水浄化処理施設に排出しないようにできるので、下水浄化処理施設での浄化負荷の軽減に寄与できる。   In this form of sewage discharge method, only the sewage actually purified to the discharge allowable water quality that satisfies the water quality management parameters is discharged into the natural environment water area. In other words, it is possible to prevent purified sewage that is uncertain whether the water quality is the discharge allowable water quality because the measurement result of the water quality management parameter is not obtained from being discharged into the natural environment water area. As a result, according to the above-described sewage discharge method, it is possible to further improve the reliability of the discharge of the purified sewage that ensures the discharge allowable water quality into the natural environment water area. Further, according to the sewage discharge method described above, since it is possible to prevent the amount of sewage discharged to the natural environment water area from being discharged to the sewage purification treatment facility, it is possible to contribute to the reduction of the purification load at the sewage purification treatment facility.

上記の上水は、上水供給を図る上水施設から供給を受けた上水であるほか、上水使用施設やその近隣の施設が汲み上げた井戸水や、湧水源から導いた湧水とできる。これら井戸水や湧水は、通常は、上水供給を図る上水施設から供給を受けた上水と同程度の水質であるので、当該上水と代用、もしくは、当該上水と併用できる。また、貯留した雨水や工業用水と言った非上水を上水供給を図る上水施設から供給を受けた上水と同程度の水質まで浄化し、その浄化水を、当該上水の代用、もしくは、当該上水と併用できる。   The above-mentioned water supply can be water supplied from a water supply facility that supplies water, well water pumped up by a water supply use facility or a nearby facility, or spring water derived from a spring source. These well waters and spring waters are usually of the same quality as the water supplied from the water supply facility that supplies the water, and can be used in place of the water or in combination with the water. In addition, the stored rainwater and industrial water is purified to the same quality as the water supplied from the water supply facility that supplies the water, and the purified water is used as a substitute for the water. Or it can be used together with the water.

（２）上記形態の下水排出方法において、前記工程（１）で用いる前記付属浄化施設は、前記上水使用施設から排出される前記下水の全量を、前記放流許容水質となるまで浄化可能とされ、前記工程（１）では、前記上水使用施設から排出される前記下水の全量を取水するようにしてもよい。こうすれば、水質管理パラメータを満たすとの判定が得られていない状況下に限って、付属浄化施設で浄化された下水を下水浄化処理施設に排出するに過ぎない。この結果、下水浄化処理施設への下水排出に伴うコスト低下が可能となる。   (2) In the sewage discharge method of the above aspect, the attached purification facility used in the step (1) can purify the entire amount of the sewage discharged from the water use facility until the discharge allowable water quality is achieved. In the step (1), the entire amount of the sewage discharged from the water use facility may be taken. In this way, the sewage purified by the attached purification facility is only discharged to the sewage purification treatment facility only in a situation where it is not determined that the water quality management parameter is satisfied. As a result, cost reduction associated with sewage discharge to the sewage purification treatment facility becomes possible.

（３）上記のいずれかの形態の下水排出方法において、前記工程（２）で用いる前記指標計測器は、前記計測水質管理パラメータが前記水質管理パラメータを満たしているとの判定を得るに必要な判定所要時間を越える計測タイミングで前記水質管理パラメータを繰り返し計測し、前記工程（２）では、前記計測水質管理パラメータが前記水質管理パラメータを満たしているとの判定が予め定めた回数に亘って継続して得られると、前記計測水質管理パラメータが前記水質管理パラメータを満たしていると判定するようにしてもよい。こうすれば、放流許容水質まで浄化された浄化済み下水しか自然環境水域に排出しないことを、より確実に担保できる。   (3) In any one of the above-described sewage discharge methods, the index measuring instrument used in the step (2) is necessary to obtain a determination that the measured water quality management parameter satisfies the water quality management parameter. The water quality management parameter is repeatedly measured at a measurement timing that exceeds the required determination time. In the step (2), the determination that the measured water quality management parameter satisfies the water quality management parameter is continued for a predetermined number of times. Then, it may be determined that the measured water quality management parameter satisfies the water quality management parameter. In this way, it can be ensured that only the purified sewage purified to the discharge allowable water quality is discharged into the natural environment water area.

（４）上記のいずれかの形態の下水排出方法において、前記工程（２）では、前記取水した下水を前記放流許容水質となるまで浄化するための水質管理パラメータを、前記下水浄化処理施設が浄化済み下水について規定する水質管理パラメータに倣った指標とするようにしてもよい。こうすれば、付属浄化施設で浄化して自然環境水域に排出する浄化済み下水の水質を、下水浄化処理施設で浄化して排出される下水の水質と同程度とできるので、自然環境水域への放流が許容される放流許容水質となるまでの下水浄化をより確実に担保できる。   (4) In the sewage discharge method according to any one of the above forms, in the step (2), the sewage purification treatment facility purifies water quality management parameters for purifying the collected sewage until the discharge allowable water quality is achieved. It is also possible to use an index that follows the water quality management parameters that prescribe sewage. In this way, the quality of the purified sewage that is purified at the attached purification facility and discharged into the natural environment water area can be the same as the quality of the sewage that is purified and discharged at the sewage purification treatment facility. Sewage purification can be ensured more reliably until the discharge water quality becomes acceptable.

（５）上記のいずれかの形態の下水排出方法において、前記工程（１）では、前記工程（２）で前記水質管理パラメータを満たすとの判定が得られていないとされた前記計測水質管理パラメータが前記水質管理パラメータを満たす側に、浄化薬液の増量注入と浄化機器の浄化活性制御の少なくとも一方を行うようにしてもよい。こうすれば、自然環境水域への放流が許容される放流許容水質となるまでの下水浄化を早期のうちに達成できる。   (5) In the sewage discharge method according to any one of the above forms, in the step (1), the measured water quality management parameter that is determined not to satisfy the water quality management parameter in the step (2) However, on the side satisfying the water quality management parameter, at least one of injection of an increased amount of the purifying chemical solution and purification activity control of the purification device may be performed. In this way, sewage purification can be achieved at an early stage until the discharge water quality is such that discharge into the natural environment is permitted.

（６）本発明の他の形態によれば、上水を使用して生じる下水を排出する上水使用施設についての下水浄化システムが提供される。この下水浄化システムは、上水を使用して生じる下水を排出する上水使用施設における下水浄化システムであって、前記上水使用施設から排出される前記下水を取水し、該取水した下水を、自然環境水域への放流が許容される放流許容水質となるまで浄化可能な付属浄化施設と、前記取水した下水の前記放流許容水質の判断に用いられる水質管理パラメータを、前記付属浄化施設で浄化済み下水について指標計測器で計測し、該計測した計測水質管理パラメータが前記水質管理パラメータを満たしているかを判定するパラメータ判定部と、該パラメータ判定部で前記計測水質管理パラメータが前記水質管理パラメータを満たすとの判定が得られた状況において、前記付属浄化施設で浄化済みの下水を、前記自然環境水域に到る排水流路に排出する排出機構部とを備える。そして、更に、排出機構部は、前記パラメータ判定部で前記計測水質管理パラメータが前記水質管理パラメータを満たすとの判定が得られていない状況下においては、前記指標計測器より下流側に設けた流路切換弁により前記自然環境水域に到る排水流路への排出を停止すると共に、前記付属浄化施設で浄化済みの下水を、前記上水使用施設が属する自治体もしくは近隣の自治体が連携した広域連合が運営する下水浄化処理施設に到る公共下水流路に前記流路切換弁から送り込む、または前記流路切換弁から前記付属浄化施設に循環させる。   (6) According to another aspect of the present invention, a sewage purification system is provided for a sewage use facility that discharges sewage generated using the sewage. The sewage purification system is a sewage purification system in a facility for using sewage that discharges sewage generated using the sewage, and takes the sewage discharged from the facility for use of sewage, Attached purification facility that can be purified until it has a dischargeable water quality that allows discharge into the natural environment water area, and a water quality management parameter that is used to determine the dischargeable water quality of the collected sewage has been purified by the attached purification facility A parameter determination unit that measures sewage with an index measuring instrument and determines whether the measured measured water quality management parameter satisfies the water quality management parameter, and the measured water quality management parameter satisfies the water quality management parameter in the parameter determination unit In the situation where the determination is made, the sewage purified at the attached purification facility is discharged to the drainage channel reaching the natural environment water area. That and a discharge mechanism part. Further, the discharge mechanism unit is configured to provide a flow provided downstream from the index measuring instrument in a situation where the parameter determination unit does not determine that the measured water quality management parameter satisfies the water quality management parameter. Discontinuation of discharge to the drainage flow path to the natural environment water area by a path switching valve, and sewage that has been purified by the attached purification facility is a wide-area association in which the municipality to which the water supply facility belongs or a neighboring municipality cooperates Is sent from the flow path switching valve to the public sewage flow path that reaches the sewage purification treatment facility operated by or circulated from the flow path switching valve to the attached purification facility.

この形態の下水浄化システムによっても、放流許容水質を担保した浄化済み下水の自然環境水域への放出の信頼性をより高めることができると共に、自然環境水域に排出する分の水量の下水を下水浄化処理施設に排出しないようにして、下水浄化処理施設での浄化負荷の軽減に寄与できる。   This form of sewage purification system can further improve the reliability of discharge of purified sewage that guarantees the dischargeable water quality into the natural environment water area, and purify the amount of sewage discharged to the natural environment water area. By not discharging to the treatment facility, it can contribute to the reduction of purification load at the sewage purification treatment facility.

本発明は、下水排出方法以外の種々の形態で実現することも可能である。例えば、上水使用施設に配設される施設浄化装置を含む下水浄化システムや、下水排出方法を実現するコンピュータプログラム、そのコンピュータプログラムを記録した一時的でない記録媒体（non-transitory storage medium）等の形態で実現することができる。   The present invention can be realized in various forms other than the sewage discharge method. For example, a sewage purification system including a facility purification device installed in a facility for using water, a computer program for realizing a sewage discharge method, a non-transitory storage medium recording the computer program, etc. It can be realized in the form.

本発明の実施形態としての下水排出方法を実践する下水浄化システムの概要を示すブロック図である。It is a block diagram which shows the outline | summary of the sewage purification system which practices the sewage discharge method as embodiment of this invention. 浄化制御装置の構成を機能的に示す説明図である。It is explanatory drawing which shows the structure of a purification control apparatus functionally. 浄化制御装置にて実行される付属浄化施設の浄化制御の手順を示すフローチャートである。It is a flowchart which shows the procedure of the purification control of the attached purification facility performed with the purification control apparatus. 定常運転モードで浄化制御装置にて実行される付属浄化施設の排出制御の手順を示すフローチャートである。It is a flowchart which shows the procedure of discharge | emission control of the attached purification facility performed with the purification control apparatus in steady operation mode.

図１は本発明の実施形態としての下水排出方法を実践する下水浄化システムＪＧＳの概要を示すブロック図である。図示するように、この下水浄化システムＪＧＳは、上水使用施設ＪＹに、付属浄化施設５０を備える。本実施形態で示す上水使用施設ＪＹは、顧客への商品陳列とその販売を図る商業施設ゾーンと、遊技場や映画館等の娯楽施設ゾーンと、レストラン等を併設した大規模な複合施設である。そして、この上水使用施設ＪＹは、当該施設が属する自治体もしくは近隣の自治体が連携した広域連合が運営して上水供給を図る上水施設ＪＳから、上水道流路ＪＳｐを経て上水の供給を受け、その供給を受けた上水を使用して、使用後の上水を下水として排出する。なお、上水使用施設ＪＹは、付属浄化施設５０を備えていればよく、大規模な複合施設に限られるものではない。例えば、工場、浴場施設等の商工業的な上下水使用施設の他、戸建ての一般住居や集合住宅といった上下水使用施設であってもよい。   FIG. 1 is a block diagram showing an outline of a sewage purification system JGS that practices a sewage discharge method as an embodiment of the present invention. As shown in the figure, this sewage purification system JGS includes an attached purification facility 50 in the water use facility JY. The water use facility JY shown in the present embodiment is a large-scale complex facility equipped with a commercial facility zone for displaying and selling products to customers, an amusement facility zone such as a playground or a movie theater, and a restaurant. is there. And this water supply use facility JY supplies the supply of water through the water supply channel JSp from the water supply facility JS which is operated by a wide-area federation in cooperation with the local government to which the facility belongs or a neighboring local government. Using the supplied water, the used water is discharged as sewage. The water use facility JY only needs to include the attached purification facility 50 and is not limited to a large-scale complex facility. For example, in addition to commercial and industrial water and sewage facilities such as factories and bathhouse facilities, water and sewage facilities such as detached general dwellings and apartment buildings may be used.

上水使用施設ＪＹは、上水道流路ＪＳｐに接続された上水分配流路２０を備え、当該流路の上流に、上水道流路ＪＳｐから供給される上水の流量を計測する上水流量計測機器１０を備える。上水流量計測機器１０は、単位時間当たりの上水流量ＪＱを常時計測する。この計測結果は、図示しない上下水道利用状況調査装置に所定時間毎に送信され、上水の利用状況の調査に用いられる。上水流量計測機器１０の計測メカニズムは、種々の形態とすることができ、超音波を利用して流量を計測する非接触式の計測機器の他、スクリューや水車を流路にて回転させて流量を計測する接触式の計測機器とできる。   The water use facility JY includes a water distribution channel 20 connected to the water channel JSp, and measures the flow rate of water supplied from the water channel JSp upstream of the channel. A device 10 is provided. The water flow rate measuring device 10 always measures the water flow rate JQ per unit time. This measurement result is transmitted to a water and sewage usage status survey device (not shown) every predetermined time, and is used for surveying the usage status of tap water. The measuring mechanism of the water flow rate measuring device 10 can be in various forms. In addition to a non-contact type measuring device that measures the flow rate using ultrasonic waves, a screw or a water turbine is rotated in the flow path. It can be a contact-type measuring device that measures the flow rate.

上水使用施設ＪＹは、上水分配流路２０にて、上記の各ゾーンのトイレ、炊事場等の水道蛇口や、水槽、噴水、調理機器等の上水使用機器に上水を分配する。上水使用施設ＪＹは、使用後の上水を、施設内の下水口から延びる集合下水流路３０にて集約した上で、施設内下水流路４０に流す。施設内下水流路４０は、上水使用施設ＪＹが属する自治体もしくは近隣の自治体が連携した広域連合が運営する下水浄化処理施設ＧＪＰに到る公共下水流路Ｇｐと接続されている。よって、上水使用施設ＪＹは、集合下水流路３０で集約した使用後の上水を、施設内下水流路４０および公共下水流路Ｇｐを経て、下水浄化処理施設ＧＪＰに下水として排出する。この下水浄化処理施設ＧＪＰは、上記の上水使用施設ＪＹを始めとする他の図示しない上水使用施設の一部或いはその全部に加え、周辺の複数の一般住居Ｈや工場Ｆ等からも、公共下水流路Ｇｐを経て、使用後の上水を下水として処理すべく受け入れる。そして、下水浄化処理施設ＧＪＰは、こうして各施設から受け入れた下水を、当該浄化処理施設の周辺の河川その他の公共の水域または海域である自然環境水域Ｒｇｊｐへの放流が許容される放流許容水質となるまで浄化した上で、その浄化済み下水を自然環境水域Ｒｇｊｐに排出・放流する。   The water-use facility JY distributes the water through the water-distribution channel 20 to water-use faucets such as toilets and kitchens in the above-mentioned zones, and water-use equipment such as water tanks, fountains, and cooking equipment. The water supply facility JY collects the used water in the collective sewage flow channel 30 extending from the sewage port in the facility, and then flows it into the sewage flow channel 40 in the facility. The in-facility sewage flow path 40 is connected to a public sewage flow path Gp that reaches a sewage purification treatment facility GJP operated by a wide-area federation in cooperation with the local government to which the water use facility JY belongs or a neighboring local government. Therefore, the water use facility JY discharges the used water collected in the collective sewage flow channel 30 as sewage to the sewage purification treatment facility GJP via the in-facility sewage flow channel 40 and the public sewage flow channel Gp. This sewage purification treatment facility GJP is also used from a plurality of surrounding general dwelling houses H and factories F in addition to some or all of the other water supply facilities (not shown) including the above-mentioned water supply facility JY. Through the public sewage channel Gp, the used sewage is received as sewage. Then, the sewage purification treatment facility GJP has the sewage water quality that allows the sewage received from each facility to be discharged into the natural environment water area Rgjp that is a river or other public water area or sea area around the purification treatment facility. After purifying until it becomes, the purified sewage is discharged and discharged into the natural environment water area Rgjp.

この他、上水使用施設ＪＹは、施設内下水流路４０に設けた下水分配弁４２と、上水使用施設ＪＹに付属の付属浄化施設５０と、浄化制御装置６０と、付属浄化施設５０から延びる付属排水流路５２と、当該流路に設けた流路切換弁７０と下水流量計測機器８０と、流路切換弁７０から付属浄化施設５０の下水流入口に延びる環流浄化流路７２と、流路切換弁７０から施設内下水流路４０の合流弁４３に延びるリターン排出流路７３とを備える。下水分配弁４２は、後述の浄化制御装置６０により駆動制御され、公共下水流路Ｇｐに上水使用施設ＪＹから排出される下水の少なくとも一部を公共下水流路Ｇｐの手前で取水し、該取水した下水を付属浄化施設５０に分配して導く。この場合、浄化制御装置６０は、付属浄化施設５０の浄化能力（浄化処理可能な流量）や、上水使用施設ＪＹからの下水排出総量、自治体等からの規制や要請等に応じて、下水分配弁４２を駆動制御して、付属浄化施設５０への分配下水流量（取水流量）を定める。なお、下水分配弁４２は、施設内下水流路４０を流れる下水の全量を取水して付属浄化施設５０に導くことも可能である。   In addition, the water use facility JY includes a sewage distribution valve 42 provided in the in-facility sewage flow path 40, an attached purification facility 50 attached to the water use facility JY, a purification control device 60, and an attached purification facility 50. An attached drainage channel 52 extending, a channel switching valve 70 and a sewage flow rate measuring device 80 provided in the channel, a circulating purification channel 72 extending from the channel switching valve 70 to the sewage inlet of the auxiliary purification facility 50, A return discharge channel 73 extending from the channel switching valve 70 to the merging valve 43 of the in-facility sewer channel 40. The sewage distribution valve 42 is driven and controlled by a purification control device 60 described later, and takes at least a part of the sewage discharged from the water use facility JY into the public sewage flow path Gp before the public sewage flow path Gp, The collected sewage is distributed and guided to the attached purification facility 50. In this case, the purification control device 60 distributes the sewage according to the purification capacity (flow rate that can be purified) of the attached purification facility 50, the total amount of sewage discharged from the water use facility JY, regulations or requests from local governments, etc. The valve 42 is driven and controlled to determine the distribution sewage flow rate (water intake flow rate) to the attached purification facility 50. The sewage distribution valve 42 can also take the entire amount of sewage flowing through the in-facility sewage flow path 40 and guide it to the attached purification facility 50.

付属浄化施設５０は、下水浄化処理施設ＧＪＰとは別に上水使用施設ＪＹの敷地内或いはその周辺に構築された施設であり、ｐＨ調整の他、生物学的酸素濃度（ＢＯＤ）や化学的酸素濃度（ＣＯＤ）等の生活環境保全に関する酸素濃度の低減、浮遊物（ＳＳ）の沈降分離といった手法による除去或いは低減、重金属の吸着除去、有機リン等の有機物の除去やその低減等を図るべく、複数の曝気槽や沈殿槽、薬品処理槽を備える。そして、この付属浄化施設５０は、下水分配弁４２から分配された下水を、後述の浄化制御装置６０の制御下において、上水使用施設ＪＹの周辺の河川その他の公共の水域または海域である自然環境水域Ｒｊｐ１への放流が許容される放流許容水質となるまで浄化し、その浄化済み下水を、付属排水流路５２およびその下流の施設外排水流路５３を経て、自然環境水域Ｒｊｐ１に排出・放流する。本実施形態の付属浄化施設５０は、上水使用施設ＪＹから排出される下水の全量を、放流許容水質となるまで浄化可能な浄化能力を備える。   The attached purification facility 50 is a facility constructed in or around the site of the water use facility JY separately from the sewage purification treatment facility GJP. In addition to pH adjustment, biological oxygen concentration (BOD) and chemical oxygen In order to reduce oxygen concentration related to living environment conservation such as concentration (COD), removal or reduction by suspended sediment (SS) sedimentation, adsorption removal of heavy metals, removal of organic substances such as organic phosphorus and its reduction, etc. A plurality of aeration tanks, precipitation tanks, and chemical treatment tanks are provided. Then, the attached purification facility 50 is a natural water or other public water area or sea area around the water use facility JY, under the control of the purification control device 60 described later, from the sewage distributed from the sewage distribution valve 42. Purify until the discharge water quality that allows discharge into the environmental water area Rjp1 is allowed, and drain the purified sewage to the natural environment water area Rjp1 via the attached drainage flow path 52 and the downstream drainage flow path 53 outside the facility. Release. The attached purification facility 50 of the present embodiment has a purification capability capable of purifying the entire amount of sewage discharged from the water use facility JY until the discharge allowable water quality is achieved.

上記の付属浄化施設５０は、上水使用施設ＪＹの単位期間当たり（例えば一日や一週間、一月の間）の上水総使用量或いは下水総排出量、敷地面積等に応じてその浄化能力および規模が決定される。例えば、付属浄化施設５０は、上記の単位期間当たりの上水使用施設ＪＹの下水総排出量の５〜１００％程度の下水を上記の自然環境水域Ｒｊｐ１への放流が許容される放流許容水質となるまで浄化できる浄化性能および能力、規模とされる。この場合、本実施形態の上水使用施設ＪＹは、既述したように商業施設ゾーン等を含む大規模な複合施設であることから、想定される或いは実際の下水総排出量は多いので、付属浄化施設５０の規模は上記範囲で定まるが、下水総排出量が少なければ、付属浄化施設５０の施設規模や能力を下水総排出量比において高めても良い。例えば、上水使用施設ＪＹがアパートやマンションといった集合住宅や小規模な工場、商業ビル等であれば、当該施設に付属の付属浄化施設５０については、下水総排出量の３０〜１００％程度の下水を自然環境水域Ｒｊｐ１への放流が許容される放流許容水質となるまで浄化できる浄化性能および能力、規模とすればよい。   The above-mentioned attached purification facility 50 is purified according to the total amount of used water or the total amount of discharged sewage, the site area, etc. per unit period of the water use facility JY (for example, during one day, one week, or one month). Capacity and scale are determined. For example, the attached purification facility 50 has a discharge allowable water quality that allows discharge of about 5 to 100% of the total sewage discharge of the water use facility JY per unit period to the natural environment water area Rjp1. The purification performance, ability, and scale that can be purified until it becomes. In this case, since the water supply facility JY of this embodiment is a large-scale complex facility including a commercial facility zone as described above, the assumed total or actual total sewage discharge amount is large. The scale of the purification facility 50 is determined within the above range, but the facility scale and capacity of the attached purification facility 50 may be increased in the ratio of total sewage discharge if the total sewage discharge is small. For example, if the water supply facility JY is an apartment house such as an apartment or a condominium, a small factory, or a commercial building, the attached purification facility 50 attached to the facility is about 30 to 100% of the total sewage discharge. What is necessary is just to set it as the purification performance, capability, and scale which can purify sewage until it becomes the discharge | emission allowable water quality which discharge | release to natural environment water area Rjp1 is permitted.

この他、付属浄化施設５０は、上記した曝気槽や沈殿槽、薬品処理槽において浄化した下水の水質浄化の程度を計測する指標計測器５４を備える。この指標計測器５４は、付属浄化施設５０の最下流域の処理水貯留域５１に配設され、この処理水貯留域５１において下水をサンプリングし、付属浄化施設５０の曝気槽等の各種処理槽で浄化済みの下水（以下、この下水を単に浄化済み下水と称する）の水質管理パラメータを計測する。水質管理パラメータには、水素イオン指数（ｐＨ）や浮遊物質量（ＳＳ）、生物学的酸素濃度（ＢＯＤ）、化学的酸素濃度（ＣＯＤ）、全有機炭素（ＴＯＣ：Total Organic Carbon）、動植物油脂類含有量、銅含有量、亜鉛含有量などが含まれる。本実施形態では、上記の水質管理パラメータのうち、水素イオン濃度（ｐＨ）と浮遊物質量（ＳＳ）と全有機炭素（ＴＯＣ）を、放流許容水質まで浄化するための水質管理パラメータとして、次の計測機器を用いて計測した。これら水質管理パラメータは、付属浄化施設５０で浄化した下水の放流許容水質の判断に用いられる。なお、生物学的酸素濃度（ＢＯＤ）と化学的酸素濃度（ＣＯＤ）を計測するようにしてもよいが、ＢＯＤ計測には、好気性環境下での五日間の培養が必要であるので、ＢＯＤ計測は行わないようにした。全有機炭素（ＴＯＣ）は、水中の有機物量を、炭素濃度として表現する指標であり、ＢＯＤやＣＯＤとも対応付けが可能である。よって、本実施形態では、ＢＯＤに加えＣＯＤの計測を割愛した。   In addition, the attached purification facility 50 includes an index measuring device 54 that measures the degree of water purification of the sewage purified in the above-described aeration tank, sedimentation tank, and chemical treatment tank. The index measuring instrument 54 is disposed in the treated water storage area 51 in the most downstream area of the attached purification facility 50, samples sewage in the treated water storage area 51, and various treatment tanks such as an aeration tank of the attached purification facility 50. The water quality management parameters of the purified sewage (hereinafter, this sewage is simply referred to as “purified sewage”) are measured. Water quality control parameters include hydrogen ion index (pH), suspended solid content (SS), biological oxygen concentration (BOD), chemical oxygen concentration (COD), total organic carbon (TOC), animal and plant oils and fats Content, copper content, zinc content and the like. In the present embodiment, among the water quality management parameters described above, the hydrogen ion concentration (pH), the suspended solid amount (SS), and the total organic carbon (TOC) are as the water quality management parameters for purifying the discharge water quality to the following values. It measured using the measuring instrument. These water quality management parameters are used to determine the discharge allowable water quality of the sewage purified by the attached purification facility 50. In addition, although you may make it measure biological oxygen concentration (BOD) and chemical oxygen concentration (COD), since BOD measurement requires five days of culture | cultivation in an aerobic environment, BOD Measurement was not performed. Total organic carbon (TOC) is an index that expresses the amount of organic matter in water as the carbon concentration, and can be associated with BOD and COD. Therefore, in this embodiment, measurement of COD in addition to BOD is omitted.

・指標１．水素イオン濃度（ｐＨ）：堀場アドバンステクノ社製水素イオン指数計測器：計測結果取得所要時間０．１分；
・指標２．浮遊物質量（ＳＳ）：堀場アドバンステクノ社製懸濁物質計測器：計測結果取得所要時間０．３分；
・指標３．全有機炭素（ＴＯＣ）：東レエンジニアリング社製有機体炭素分析装置：計測結果取得所要時間４分； ・ Indicator 1. Hydrogen ion concentration (pH): HORIBA Advanced Techno Co., Ltd. hydrogen ion index meter: Measurement result acquisition time required 0.1 minutes;
・ Indicator 2. Suspended matter amount (SS): HORIBA Advanced Techno Suspended matter measuring device: Measurement result acquisition time 0.3 minutes;
・ Indicator 3. Total organic carbon (TOC): Organic carbon analyzer manufactured by Toray Engineering Co., Ltd .: Measurement result acquisition time: 4 minutes;

指標計測器５４で得られた上記の各種水質管理パラメータは、付属浄化施設５０の最下流側の処理水貯留域５１で計測した実際の水質管理パラメータであることから、付属浄化施設５０で浄化済みでこれから自然環境水域Ｒｊｐ１に正に排出されようとする浄化済み下水の水質管理パラメータである。本実施形態では、指標計測器５４で計測した実際の水質管理パラメータに応じて、浄化下水の自然環境水域Ｒｊｐ１への排出の是非を後述するように決定することから、以下の説明においては、指標計測器５４で計測した実際の水質管理パラメータを計測水質管理パラメータと称し、下水浄化処理施設ＧＪＰが規定した水質管理パラメータと区別する。   The various water quality management parameters obtained by the index measuring instrument 54 are actual water quality management parameters measured in the treated water storage area 51 on the most downstream side of the attached purification facility 50, and thus have been purified by the attached purification facility 50. Thus, it is a water quality management parameter of purified sewage that is about to be discharged into the natural environment water area Rjp1. In the present embodiment, the right or wrong of discharge of the purified sewage into the natural environment water area Rjp1 is determined in accordance with the actual water quality management parameter measured by the index measuring instrument 54 as described later. The actual water quality management parameter measured by the measuring instrument 54 is referred to as a measured water quality management parameter, and is distinguished from the water quality management parameter defined by the sewage purification facility GJP.

指標計測器５４が配設された処理水貯留域５１は、付属浄化施設５０で所定時間に亘って浄化された浄化済み下水を貯留可能な容積とされている。そして、付属排水流路５２は、この処理水貯留域５１に貯留された浄化済み下水を、処理水貯留域５１に先に流れ込んだ浄化済み下水から、施設外排水流路５３に導く。処理水貯留域５１の貯留容積については、後述する。   The treated water storage area 51 in which the index measuring instrument 54 is disposed has a volume capable of storing the purified sewage purified in the attached purification facility 50 for a predetermined time. Then, the attached drainage channel 52 guides the purified sewage stored in the treated water storage area 51 from the purified sewage that has flowed into the treated water storage area 51 first to the drainage channel 53 outside the facility. The storage volume of the treated water storage area 51 will be described later.

上水使用施設ＪＹと下水浄化処理施設ＧＪＰは、公共下水流路Ｇｐの経路だけ離れているが、公共下水流路Ｇｐの経路長は一般的にはそれほど長くはない。よって、付属浄化施設５０の浄化済み下水の排出・放流先である自然環境水域Ｒｊｐ１と、下水浄化処理施設ＧＪＰの浄化済み下水の排出・放流先である自然環境水域Ｒｇｊｐとは、例えば同一の河川の上下流域の関係であったり、本流と支流の関係であることが多い。付属浄化施設５０による下水浄化については、浄化制御装置６０による制御と合わせて後述する。   Although the water use facility JY and the sewage purification treatment facility GJP are separated by the path of the public sewage flow path Gp, the path length of the public sewage flow path Gp is generally not so long. Therefore, the natural environment water area Rjp1 which is the discharge / discharge destination of the purified sewage of the attached purification facility 50 and the natural environment water area Rgjp which is the discharge / discharge destination of the purified sewage of the sewage purification treatment facility GJP are, for example, the same river It is often the relationship between upstream and downstream areas, or the relationship between the mainstream and tributaries. The sewage purification by the attached purification facility 50 will be described later together with the control by the purification control device 60.

流路切換弁７０は、後述の浄化制御装置６０の制御を受けて駆動し、付属浄化施設５０の浄化済み下水の排出先を、付属排水流路５２に続く施設外排水流路５３か付属浄化施設５０、或いは施設内下水流路４０に切り換える。つまり、流路切換弁７０は、後述の浄化水質確保状況下では、流路を付属排水流路５２に切り換え、付属浄化施設５０の浄化済み下水を自然環境水域Ｒｊｐ１に到る施設外排水流路５３に排出する。また、流路切換弁７０は、後述の浄化水質未確保状況下では、施設外排水流路５３に到る流路を閉じた上で、流路を環流浄化流路７２かリターン排出流路７３のいずれか一方、或いは両者に切り換える。これにより、後述の浄化水質未確保状況下では、付属浄化施設５０の浄化済み下水は、リターン排出流路７３と合流弁４３を経て公共下水流路Ｇｐに送り込んだり、付属浄化施設５０にその下水流入口から環流する。流路切換弁７０が環流浄化流路７２とリターン排出流路７３の両流路に流路を切り換えた場合には、流量比が設定される。流路切換弁７０によるこうした流路切換や流量比設定は、浄化制御装置６０にて後述するように制御される。   The flow path switching valve 70 is driven under the control of a purification control device 60 which will be described later, and the drainage destination of the purified sewage from the attached purification facility 50 is connected to the outside drainage flow path 53 following the attached drainage flow path 52 or the attached purification. Switch to the facility 50 or the in-facility sewer channel 40. That is, the flow path switching valve 70 switches the flow path to the attached drainage flow path 52 under the condition of securing purified water quality described later, and the outside drainage flow path for the purified sewage from the attached purification facility 50 to the natural environment water area Rjp1. To 53. In addition, the flow path switching valve 70 closes the flow path to the out-of-facility drain flow path 53 and then sets the flow path to the recirculation purification flow path 72 or the return discharge flow path 73 in a situation where purified water quality is not ensured, which will be described later. Switch to either one or both. As a result, under the situation where the purified water quality is not ensured as described later, the purified sewage from the attached purification facility 50 is sent to the public sewage flow passage Gp via the return discharge passage 73 and the junction valve 43, or to the attached purification facility 50. Return from the water inlet. When the flow path switching valve 70 switches the flow path to both the recirculation purification flow path 72 and the return discharge flow path 73, the flow rate ratio is set. Such flow path switching and flow rate ratio setting by the flow path switching valve 70 are controlled by the purification control device 60 as described later.

下水流量計測機器８０は、施設外排水流路５３に接続された付属排水流路５２の経路に設置され、付属排水流路５２および施設外排水流路５３を経て自然環境水域Ｒｊｐ１に排出される下水流量、即ち、付属浄化施設５０の浄化済みの下水が自然環境水域Ｒｊｐ１に排出される際の流量を計測する。この下水流量計測機器８０は、既述した上水流量計測機器１０と同様、単位時間当たりの浄化済み下水流量ＳＧＱを常時計測する。この計測結果は、図示しない上下水道利用状況調査装置に所定時間毎に送信され、上水の利用状況の調査に用いられる。下水流量計測機器８０の計測メカニズムおよびその計測結果たる浄化済み下水流量ＳＧＱと施設特定データの送信にあっても、上水流量計測機器１０と同様である。   The sewage flow rate measuring device 80 is installed in the route of the attached drainage flow channel 52 connected to the outside facility drainage channel 53, and is discharged to the natural environment water area Rjp1 through the attached drainage channel 52 and the outside facility drainage channel 53. The sewage flow rate, that is, the flow rate when the purified sewage from the attached purification facility 50 is discharged to the natural environment water area Rjp1 is measured. This sewage flow rate measuring device 80 always measures the purified sewage flow rate SGQ per unit time, like the above-described water flow rate measuring device 10. This measurement result is transmitted to a water and sewage usage status survey device (not shown) every predetermined time, and is used for surveying the usage status of tap water. The measurement mechanism of the sewage flow rate measuring device 80 and the purified sewage flow rate SGQ as the measurement result and the transmission of the facility specifying data are the same as those of the clean water flow rate measuring device 10.

次に、浄化制御装置６０について説明する。図２は浄化制御装置６０の構成を機能的に示す説明図である。浄化制御装置６０は、付属浄化施設５０による下水浄化の状況を制御したり、下水分配弁４２からの取水制御、流路切換弁７０を介した下水の環流制御等を行う。そして、浄化制御装置６０は、こうした制御を図るべく、制御装置６２と、データ更新部６３と、各種のセンサー群６４と、各種の駆動機器群６６と、放水規制データベース６８とを備える。   Next, the purification control device 60 will be described. FIG. 2 is an explanatory diagram functionally showing the configuration of the purification control device 60. The purification control device 60 controls the state of sewage purification by the attached purification facility 50, performs intake control from the sewage distribution valve 42, sewage recirculation control via the flow path switching valve 70, and the like. And the purification control apparatus 60 is provided with the control apparatus 62, the data update part 63, various sensor groups 64, various drive device groups 66, and the water discharge regulation database 68 in order to aim at such control.

制御装置６２は、いわゆるパーソナルコンピューターを用いて構成され、当該コンピューターのＣＰＵ、ＲＡＭ、ＲＯＭおよび後述の処理により、上記の各制御を担う。また、制御装置６２は、指標計測器５４の計測した各種計測水質管理パラメータを入力し、後述するように、この計測水質管理パラメータを用いた水質浄化是非判定、弁駆動制御を行う。データ更新部６３は、外部のデータ通信網、例えばインターネットＮＷと接続され、このインターネットＮＷを介して、放水規制情報や水質管理パラメータを随時入手し、後述の放水規制データベース６８の記憶内容を更新する。センサー群６４は、付属浄化施設５０が有する各処理槽の浄化状況や機器駆動状況を計測するセンサー（例えばｐＨセンサー、酸素濃度センサー、水位センサー等）や、既述した上水流量計測機器１０や下水流量計測機器８０が送信する流量データの受信機器等を含む。駆動機器群６６は、付属浄化施設５０が有する例えば曝気機器、攪拌機器、送水機器等の他、既述した下水分配弁４２や流路切換弁７０が含まれる。   The control device 62 is configured by using a so-called personal computer, and is responsible for each control described above by the CPU, RAM, ROM of the computer and processing described later. Further, the control device 62 inputs various measured water quality management parameters measured by the index measuring instrument 54, and performs water quality purification determination and valve drive control using the measured water quality management parameters as will be described later. The data update unit 63 is connected to an external data communication network, for example, the Internet NW, and obtains water discharge restriction information and water quality management parameters as needed through the Internet NW, and updates the stored contents of a water discharge restriction database 68 described later. . The sensor group 64 includes sensors (for example, a pH sensor, an oxygen concentration sensor, a water level sensor, etc.) that measure the purification status and device driving status of each treatment tank of the attached purification facility 50, the above-described water flow rate measuring device 10 and the like. It includes a receiving device for flow rate data transmitted by the sewage flow rate measuring device 80. The drive device group 66 includes, for example, the sewage distribution valve 42 and the flow path switching valve 70 described above, in addition to the aeration device, the stirring device, the water supply device, and the like that the attached purification facility 50 has.

放水規制データベース６８は、外部からのデータの読み書きが可能な記憶媒体、例えばハードディスクドライブやその他の媒体で構成され、制御装置６２に接続されている。この放水規制データベース６８は、上水使用施設ＪＹの周辺の自然環境水域Ｒｊｐ１への放流が許容される放流許容水質まで浄化するための種々の水質管理パラメータ、例えば、既述したｐＨやＴＯＣ等の規制範囲の他、浮遊物除去規制範囲、自然環境水域Ｒｊｐ１への排出量（放水量）の上限値、河川氾濫等の際の緊急止水の要請の有無等を記憶する。上記の水質管理パラメータは、上水使用施設ＪＹが属する自治体もしくは広域連合が運営する下水浄化処理施設ＧＪＰにおいても、下水浄化に用いられている。本実施形態では、下水浄化処理施設ＧＪＰによる下水浄化と同程度の下水浄化を付属浄化施設５０にても達成すべく、上記のデータ更新部６３により水質管理パラメータを下水浄化処理施設ＧＪＰから随時入手して更新し、放水規制データベース６８に随時記憶する。この場合、仮に下水浄化処理施設ＧＪＰの水質管理パラメータが公開されていなければ、水質保全の観点から、専用回線等にて、下水浄化処理施設ＧＪＰから水質管理パラメータを入手して更新すればよい。なお、水質管理パラメータは、指標計測器５４の計測水質管理パラメータと対応している。また、下水浄化処理施設ＧＪＰの採用する水質管理パラメータと全く同一とする必要はなく、上水使用施設ＪＹの周辺の自然環境水域Ｒｊｐ１への放流が許容される放流許容水質まで浄化できるのであれば、付属浄化施設５０の水質管理パラメータを、下水浄化処理施設ＧＪＰの採用する水質管理パラメータより緩くすることも、厳しくすることもできる。上記した浄化制御装置６０は、付属浄化施設５０の浄化制御として、指標計測器５４の計測結果を用いつつ流路切換弁７０の切換制御を図るので、指標計測器５４や流路切換弁７０と共に、パラメータ判定部や排出機構部を構築する。   The water discharge restriction database 68 is composed of a storage medium capable of reading and writing data from the outside, such as a hard disk drive and other media, and is connected to the control device 62. This water discharge regulation database 68 includes various water quality management parameters for purifying to a discharge allowable water quality that allows discharge to the natural environment water area Rjp1 around the water use facility JY, such as pH and TOC described above. In addition to the regulation range, the suspended matter removal regulation range, the upper limit value of the discharge amount (water discharge amount) to the natural environment water area Rjp1, the presence / absence of a request for emergency water stop in the case of river flooding, etc. are stored. The above water quality management parameters are also used for sewage purification in the sewage purification treatment facility GJP operated by the local government or the wide-area association to which the water use facility JY belongs. In this embodiment, in order to achieve the same level of sewage purification as the sewage purification by the sewage purification treatment facility GJP even in the attached purification facility 50, the data update unit 63 obtains water quality management parameters from the sewage purification treatment facility GJP as needed. And updated and stored in the water discharge regulation database 68 as needed. In this case, if the water quality management parameters of the sewage purification treatment facility GJP are not disclosed, the water quality management parameters may be obtained and updated from the sewage purification treatment facility GJP through a dedicated line or the like from the viewpoint of water quality maintenance. The water quality management parameter corresponds to the measured water quality management parameter of the index measuring instrument 54. The water quality management parameters adopted by the sewage purification facility GJP need not be exactly the same, as long as the water can be purified to an allowable discharge quality that allows discharge to the natural environment water area Rjp1 around the water use facility JY. The water quality management parameters of the attached purification facility 50 can be made looser or stricter than the water quality management parameters adopted by the sewage purification facility GJP. The purification control device 60 described above performs switching control of the flow path switching valve 70 while using the measurement result of the index measuring instrument 54 as purification control of the attached purification facility 50, and therefore, together with the index measuring instrument 54 and the flow path switching valve 70. The parameter determination unit and the discharge mechanism unit are constructed.

図３は浄化制御装置６０にて実行される付属浄化施設５０の浄化制御の手順を示すフローチャートである。図示する浄化制御は、付属浄化施設５０の運転モードを決定した上で、各運転モードに従って付属浄化施設５０を駆動制御するためのものであり、浄化制御装置６０にて繰り返し実行される。この浄化制御では、まず、付属浄化施設５０の運転モードを決定する運転モードファクターの読み込み（ステップＳ１００）に続き、その読み込み結果から、付属浄化施設５０を運転すべき運転モードが定常運転モードか否かを判定する（ステップＳ１１０）。本実施形態の下水排出方法で用いる付属浄化施設５０は、浄化済み下水の水質が自然環境水域Ｒｊｐ１への放出に適った放流許容水質を満たしている状況下の定常運転モードと、自然環境水域Ｒｊｐ１にて河川の氾濫が想定されるような場合の緊急止水モードと、保守点検等により運転の停止が要請される停止モードのいずれかで駆動制御される。そして、緊急止水モードは、図２で示した緊急止水ファクターにより決定され、停止モードは、図示しない制御停止スイッチ等の操作により決定され、この両モードが未決定の場合は、定常運転モードとなる。よって、ステップＳ１００の運転モードファクターの読み込みでは、図２で示した緊急止水ファクターの設定状況の読み込みと、制御停止スイッチ等の操作スキャンがなされる。   FIG. 3 is a flowchart showing a purification control procedure of the attached purification facility 50 executed by the purification control device 60. The purification control shown in the figure is for driving and controlling the attached purification facility 50 in accordance with each operation mode after determining the operation mode of the attached purification facility 50, and is repeatedly executed by the purification control device 60. In this purification control, first, after reading the operation mode factor for determining the operation mode of the attached purification facility 50 (step S100), it is determined from the read result whether the operation mode in which the attached purification facility 50 should be operated is the steady operation mode. Is determined (step S110). The attached purification facility 50 used in the sewage discharge method of the present embodiment includes a steady operation mode in a state where the quality of the purified sewage satisfies the discharge allowable water quality suitable for the discharge to the natural environment water area Rjp1, and the natural environment water area Rjp1. Drive control is performed in either an emergency water stop mode when river flooding is assumed at or a stop mode in which operation stop is requested by maintenance inspection or the like. Then, the emergency water stop mode is determined by the emergency water stop factor shown in FIG. 2, and the stop mode is determined by the operation of a control stop switch (not shown) or the like. It becomes. Therefore, in the reading of the operation mode factor in step S100, the setting status of the emergency water stop factor shown in FIG. 2 and the operation scan of the control stop switch and the like are performed.

ステップＳ１００の運転モードファクターの読み込みで、緊急止水ファクターが未設定であり、且つ、制御停止スイッチ等の操作もないと、ステップＳ１１０において、浄化制御装置６０は、現状の運転モードは定常運転モードであると肯定判定し、付属浄化施設５０を次のようにして定常運転モードで駆動制御する（ステップＳ１２０）。このステップＳ１２０では、浄化制御装置６０は、下水分配弁４２からの取水下水流量が付属浄化施設５０の浄化処理流量の５０〜８０％に収まるよう、下水分配弁４２を駆動制御する。このように定常制御下にて取水制限を行うことで、付属浄化施設５０に入り込んで浄化対象となる下水流量に浄化能力上の余裕を持たせ、付属浄化施設５０の負荷過大運転を回避して、浄化性能の向上や高い浄化能力の維持を図る。また、浄化制御装置６０は、管理目標である水質管理パラメータを図２で示した放水規制データベース６８から読み込みつつ付属浄化施設５０の曝気機器等を定常状態で駆動制御して、上記の取水流量で付属浄化施設５０に入り込んだ下水を付属浄化施設５０にて浄化する。この際、浄化制御装置６０は、付属浄化施設５０の最下流側の処理水貯留域５１において指標計測器５４から得た実際の計測水質管理パラメータも読み込み、両水質管理パラメータを用いて付属浄化施設５０の曝気機器等をフィードバック制御、或いはフィードフォワード制御する。なお、下水分配弁４２からの下水の取水量を、上水使用施設ＪＹの稼働状況を考慮して、閉店期間や休日等では高めたりしてもよい。また、下水分配弁４２からの下水の取水量を、施設内下水流路４０を流れる下水の全量としてもよい。なお、下水分配弁４２からの取水下水流量を付属浄化施設５０の浄化処理流量の５０〜８０％に収まるようにするほか、この取水下水流量を浄化処理流量の１００％としてもよい。   When the operation mode factor is read in step S100 and the emergency water stop factor is not set and there is no operation of the control stop switch or the like, in step S110, the purification control device 60 determines that the current operation mode is the steady operation mode. The affirmative determination is made and the attached purification facility 50 is driven and controlled in the steady operation mode as follows (step S120). In step S <b> 120, the purification control device 60 drives and controls the sewage distribution valve 42 so that the intake sewage flow rate from the sewage distribution valve 42 falls within 50 to 80% of the purification treatment flow rate of the attached purification facility 50. By restricting water intake under steady control in this way, the sewage flow into the attached purification facility 50 is given a margin for purification capacity, and overload operation of the attached purification facility 50 is avoided. Improve purification performance and maintain high purification capacity. Further, the purification control device 60 drives and controls the aeration equipment and the like of the attached purification facility 50 in a steady state while reading the water quality management parameter as the management target from the water discharge regulation database 68 shown in FIG. Sewage that has entered the attached purification facility 50 is purified by the attached purification facility 50. At this time, the purification control device 60 also reads an actual measured water quality management parameter obtained from the index measuring instrument 54 in the treated water storage area 51 on the most downstream side of the attached purification facility 50, and uses both water quality management parameters to attach the attached purification facility. 50 aeration devices and the like are feedback-controlled or feed-forward controlled. Note that the amount of sewage taken from the sewage distribution valve 42 may be increased during a closed period, a holiday, or the like in consideration of the operation status of the water use facility JY. The amount of sewage taken from the sewage distribution valve 42 may be the total amount of sewage flowing through the in-facility sewage flow path 40. In addition, the intake sewage flow rate from the sewage distribution valve 42 may be within 50 to 80% of the purification treatment flow rate of the attached purification facility 50, and the intake sewage flow rate may be 100% of the purification treatment flow rate.

ステップＳ１２０での付属浄化施設５０の制御は、下水浄化に関する機器についての制御である。よって、浄化制御装置６０は、ステップＳ１２０に続き、浄化済み下水の排出に関与する定常運転下での排出制御を行う（ステップＳ１３０）。図４は定常運転モードで浄化制御装置６０にて実行される付属浄化施設５０の排出制御の手順を示すフローチャートである。   The control of the attached purification facility 50 in step S120 is control of equipment related to sewage purification. Therefore, the purification control device 60 performs the discharge control under the steady operation related to the discharge of the purified sewage following the step S120 (step S130). FIG. 4 is a flowchart showing the procedure of the discharge control of the attached purification facility 50 executed by the purification control device 60 in the steady operation mode.

定常運転モードでの排出制御は、付属浄化施設５０の浄化済み下水の排出先をその都度に決定する制御であり、まず、付属浄化施設５０における処理水貯留域５１で水質管理パラメータを計測する指標計測器５４から計測水質管理パラメータを得るまでの計測待機時間が経過したか否かを判定する（ステップＳ１３１）。ステップＳ１３１で判定対象となる計測待機時間は、計測水質管理パラメータが水質管理パラメータを満たしているとの判定を得るに必要な判定所要時間であって、上記の指標１〜指標３に対応する各水質管理パラメータごとに指標計測器５４が含む各計測機器が対応する水質管理パラメータを計測するために要する所要時間（計測結果取得所要時間）の最長の所要時間より数秒長い時間である。そして、指標１〜指標３の水質管理パラメータごとに指標計測器５４が有する各計測機器は、指標３の水質管理パラメータについての最長の所要時間に対応した計測タイミングで水質管理パラメータの計測を開始し、計測結果が得られ次第、その計測結果、即ち計測水質管理パラメータを浄化制御装置６０に出力する。よって、浄化制御装置６０は、計測待機期間ごとに、指標１〜指標３の全ての計測水質管理パラメータを指標計測器５４から取得し、取得した計測水質管理パラメータを放水規制データベース６８（図２参照）に記憶して保存する。つまり、指標１〜指標３の全ての計測水質管理パラメータは、上記の計測結果取得所要時間を越える計測タイミングで得られることになる。   The discharge control in the steady operation mode is a control for determining the discharge destination of the purified sewage in the attached purification facility 50 each time. First, an index for measuring the water quality management parameter in the treated water storage area 51 in the attached purification facility 50. It is determined whether or not the measurement standby time until obtaining the measured water quality management parameter from the measuring instrument 54 has elapsed (step S131). The measurement standby time to be determined in step S131 is a determination required time required to obtain a determination that the measured water quality management parameter satisfies the water quality management parameter, and each of the measurement standby times corresponding to the above indices 1 to 3 is used. This time is several seconds longer than the longest required time (measurement result acquisition required time) required to measure the water quality management parameter corresponding to each measuring device included in the index measuring instrument 54 for each water quality management parameter. And each measuring device which index measuring instrument 54 has for every water quality management parameter of index 1 to index 3 starts measurement of a water quality management parameter at the measurement timing corresponding to the longest required time about water quality management parameter of index 3. As soon as the measurement result is obtained, the measurement result, that is, the measured water quality management parameter is output to the purification control device 60. Therefore, the purification control device 60 acquires all the measured water quality management parameters of the indices 1 to 3 from the index measuring instrument 54 for each measurement standby period, and the acquired measured water quality management parameters are used in the discharge regulation database 68 (see FIG. 2). ) And save. That is, all the measured water quality management parameters of the indices 1 to 3 are obtained at the measurement timing exceeding the measurement result acquisition time.

ステップＳ１３１で計測経過時間が経過していないと判定した場合は、指標１〜指標３の水質管理パラメータについての全ての計測水質管理パラメータが得られていないことになるので、浄化制御装置６０は、図４の排出制御ルーチンおよび図３の浄化制御ルーチンを一旦終了する。このようにステップＳ１３１の否定判定を経て制御ルーチンが終了した場合には、付属浄化施設５０の浄化済み下水の排出先は、前回の制御ルーチンで規定された排出先が維持される。例えば、前回の制御ルーチンで規定された排出先が自然環境水域Ｒｊｐ１に到る施設外排水流路５３であれば、付属浄化施設５０の浄化済み下水の排出先は施設外排水流路５３となり、浄化済み下水は施設外排水流路５３を経て自然環境水域Ｒｊｐ１に排出される。なお、計測経過時間が経過していない期間は、浄化水質が未定の浄化水質未確保状況となる。   If it is determined in step S131 that the measurement elapsed time has not elapsed, not all the measured water quality management parameters for the water quality management parameters of index 1 to index 3 have been obtained. The discharge control routine of FIG. 4 and the purification control routine of FIG. 3 are once ended. As described above, when the control routine is completed through the negative determination in step S131, the discharge destination defined in the previous control routine is maintained as the discharge destination of the purified sewage in the attached purification facility 50. For example, if the discharge destination specified in the previous control routine is the out-of-facility drainage channel 53 that reaches the natural environment water area Rjp1, the purified sewage discharge destination of the attached purification facility 50 becomes the out-of-facility drainage channel 53, The purified sewage is discharged to the natural environment water area Rjp1 through the drainage channel 53 outside the facility. In addition, in the period when the measurement elapsed time has not passed, the purified water quality is not yet secured and the purified water quality is not secured.

ところで、上記した計測待機期間の浄化水質未確保状況下においても、既述したステップＳ１２０の定常運転モードによる下水浄化は付属浄化施設５０でなされていることから、本実施形態の下水排出方法で用いる付属浄化施設５０では、次のような対処を図っている。付属浄化施設５０は、最下流域に処理水貯留域５１を有し、この処理水貯留域５１の浄化済み下水の貯留容積を、付属浄化施設５０で上記の計測待機時間に亘って浄化された浄化済み下水を貯留可能な容積としている。よって、本実施形態の下水排出方法で用いる付属浄化施設５０によれば、指標１〜指標３の水質管理パラメータに対応する計測水質管理パラメータが全て得られるまでに付属浄化施設５０で浄化された浄化済み下水を、仮に前回の制御ルーチンで排出先が施設外排水流路５３に規定されていても、この施設外排水流路５３を経て自然環境水域Ｒｊｐ１に排出しないようにできる。例えば、付属浄化施設５０の浄化能力が１００ｍ３／ｈであれば、計測待機時間に亘って浄化された浄化済み下水は６．７ｍ３程度となり、処理水貯留域５１の貯留容積をこの程度の浄化済み下水を貯留可能な容積、例えば７〜１０ｍ３とすれば済む。 By the way, since the sewage purification by the steady operation mode of the above-described step S120 is performed in the attached purification facility 50 even in the above-described situation where the purified water quality is not secured during the measurement standby period, it is used in the sewage discharge method of the present embodiment. In the attached purification facility 50, the following measures are taken. The attached purification facility 50 has a treated water storage area 51 in the most downstream area, and the storage volume of purified sewage in the treated water storage area 51 was purified over the measurement waiting time in the attached purification facility 50. The volume is enough to store purified sewage. Therefore, according to the attached purification facility 50 used in the sewage discharge method of this embodiment, the purification purified by the attached purification facility 50 until all the measured water quality management parameters corresponding to the water quality management parameters of the indicators 1 to 3 are obtained. Even if the drain destination is defined in the outside drainage flow channel 53 in the previous control routine, it is possible to prevent the discharged sewage from being discharged into the natural environment water area Rjp1 through this outside drainage flow channel 53. For example, if the purification capacity of the attached purification facility 50 is 100 m 3 / h, the purified sewage purified over the measurement waiting time is about 6.7 m 3, and the storage volume of the treated water storage area 51 is reduced to this level. A volume capable of storing purified sewage, for example, 7 to 10 m 3 suffices.

浄化制御装置６０は、ステップＳ１３１で計測経過時間が経過したと肯定判定すると、指標計測器５４から取得して放水規制データベース６８に記憶済みの計測水質管理パラメータを読み込む（ステップＳ１３２）。次いで、浄化制御装置６０は、読み込んだ計測水質管理パラメータが放水規制データベース６８に記憶済みの水質管理パラメータを充足しているか否かを判定する（ステップＳ１３３）。ステップＳ１３３で計測水質管理パラメータが放水規制データベース６８に記憶済みの水質管理パラメータを充足していると肯定判定すると、浄化制御装置６０は、前回の図４の排出制御ルーチンに引き続いて、今回の計測水質管理パラメータが継続して水質管理パラメータを充足している否かを判定する（ステップＳ１３４）。そして、前回に引き続き今回も計測水質管理パラメータが継続して水質管理パラメータを充足していると肯定判定すると、浄化制御装置６０は、定常下での流路切換を行い（ステップＳ１３５）、本ルーチンを一旦終了させる。この定常下での流路切換は、付属浄化施設５０により浄化済み下水の排出先が図１の施設外排水流路５３を経た自然環境水域Ｒｊｐ１となるように、流路切換弁７０を切換制御することでなされる。   If the purification control device 60 makes a positive determination in step S131 that the elapsed measurement time has elapsed, it reads the measured water quality management parameter acquired from the index measuring instrument 54 and stored in the water discharge restriction database 68 (step S132). Next, the purification control device 60 determines whether or not the read measured water quality management parameter satisfies the water quality management parameter stored in the water discharge restriction database 68 (step S133). If it is determined in step S133 that the measured water quality management parameter satisfies the water quality management parameter stored in the discharge regulation database 68, the purification control device 60 continues to the current discharge control routine of FIG. It is determined whether or not the water quality management parameter continues to satisfy the water quality management parameter (step S134). If the determination that the measured water quality management parameter continues and satisfies the water quality management parameter is affirmed after the previous time, the purification control device 60 performs channel switching under normal conditions (step S135), and this routine Is temporarily terminated. In this steady-state flow path switching, the flow path switching valve 70 is controlled to be switched so that the discharge destination of the sewage purified by the attached purification facility 50 becomes the natural environment water area Rjp1 through the external drainage flow path 53 of FIG. Is done.

その一方、浄化制御装置６０は、ステップＳ１３３において計測水質管理パラメータが水質管理パラメータを充足していないと判定した場合と、ステップＳ１３４において今回の計測水質管理パラメータが継続して水質管理パラメータを充足していないと判定した場合には、浄化制御装置６０は、下水浄化を現状より高めるための浄化薬液の増量注入と浄化機器の浄化活性制御（ステップＳ１３６）と、非定常下での流路切換（ステップＳ１３７）とを順次行い、本ルーチンを一旦終了させる。ステップＳ１３６での、浄化薬液の増量注入は、例えばＴＯＣが高い計測値であったために、有機物の減少をもたらす浄化薬液を、ＴＯＣがこれに関する水質管理パラメータを満たす側に付属浄化施設５０の薬液処理槽において増量注入することである。また、浄化機器の浄化活性制御は、フィルター等による浮遊物除去を高めるために浄化機器である攪拌機を高回転で制御したり、曝気槽での曝気が活性化するよう曝気機器を高速駆動制御することなどである。非定常下でのステップＳ１３７の流路切換は、付属浄化施設５０の浄化済み下水の排出先が図１の環流浄化流路７２とリターン排出流路７３のいずれか一方、或いは両流路となるように、流路切換弁７０を切換制御することでなされる。付属浄化施設５０の浄化済み下水の排出先を環流浄化流路７２とリターン排出流路７３の両流路とする場合には、環流浄化流路７２への放出流量とリターン排出流路７３への放出流量とは、浄化制御装置６０の制御下での流路切換弁７０における流路開度設定により規定される。上記の両流量の流量比は、予め規定した流量比としてもよく、現時点での付属浄化施設５０への下水取水量に応じて、適宜、可変制御するようにしてもよい。   On the other hand, the purification control device 60 determines that the measured water quality management parameter does not satisfy the water quality management parameter in step S133 and the current measured water quality management parameter continues to satisfy the water quality management parameter in step S134. If it is determined that it is not, the purification control device 60 injects an increased amount of the cleaning chemical solution to improve the sewage purification from the current level, the purification activation control of the purification equipment (step S136), and the flow path switching under unsteady conditions (step S136). Step S137) is sequentially performed, and this routine is temporarily terminated. The increased injection of the purifying chemical solution in step S136 is, for example, a measurement value with a high TOC, so that the purifying chemical solution that causes a decrease in organic substances is treated with the chemical solution treatment of the attached purification facility 50 on the side where the TOC satisfies the water quality management parameters. It is to inject a larger amount in the tank. In addition, the purification activity control of the purification equipment controls the stirrer, which is a purification equipment, at a high rotation speed in order to enhance the removal of suspended matter by a filter, etc., and controls the aeration equipment at high speed so that aeration in the aeration tank is activated And so on. In the non-steady state, the flow path switching in step S137 is such that either the circulating purification flow path 72 or the return discharge flow path 73 in FIG. In this way, the flow path switching valve 70 is controlled to be switched. When the purified sewage discharge destination of the attached purification facility 50 is both the recirculation purification flow path 72 and the return discharge flow path 73, the discharge flow rate to the recirculation purification flow path 72 and the return discharge flow path 73 The discharge flow rate is defined by the channel opening degree setting in the channel switching valve 70 under the control of the purification control device 60. The flow rate ratio between the two flow rates may be a predetermined flow rate ratio, and may be appropriately variably controlled according to the amount of sewage water taken into the attached purification facility 50 at the present time.

なお、ステップＳ１３３において計測水質管理パラメータが水質管理パラメータを充足していないと判定した場合と、ステップＳ１３４において今回の計測水質管理パラメータが継続して水質管理パラメータを充足していないと判定した場合とにおいて、パラメータ非充足の旨を報知する警告灯の点灯やテキスト表示、アラーム音発生を行うようにしてもよい。こうすれば、パラメータ非充足を認知した施設管理人が、ステップＳ１３６における浄化薬液の増量注入や浄化機器の浄化活性制御の実行状況、およびステップＳ１３７における流路切換の実行状況を確認できる。また、浄化制御装置６０による浄化薬液の増量注入と浄化機器の浄化活性制御および流路切換に代わり、施設管理人によるこれら行為の代行も可能となる。   When it is determined in step S133 that the measured water quality management parameter does not satisfy the water quality management parameter, and when it is determined in step S134 that the current measured water quality management parameter does not continue to satisfy the water quality management parameter. In this case, a warning lamp for notifying that the parameter is not satisfied, lighting of a text, and generation of an alarm sound may be performed. In this way, the facility manager who has recognized that the parameter is not satisfied can check the execution state of the increased injection of the purifying chemical solution and the purifying activity control of the purifying device in step S136, and the execution state of the flow path switching in step S137. Further, in place of the increase injection of the purifying chemical solution by the purification control device 60, the purification activity control of the purification equipment, and the flow path switching, the facility manager can perform these acts.

次に、上記した定常運転モード以外の運転モードにおける付属浄化施設５０の浄化制御について、図３に戻って説明する。既述したステップＳ１１０において、緊急止水ファクターの設定状況や制御停止スイッチ等の操作状況から、現状の運転モードは定常運転モードではないと判定すると、浄化制御装置６０は、緊急止水の要請があるか否かを判定する（ステップＳ１４０）。この判定は、緊急止水ファクターの設定状況に基づいて下され、緊急止水ファクターが設定されていると、浄化制御装置６０は、付属浄化施設５０を緊急止水モードで駆動制御し（ステップＳ１５０）、本ルーチンを一旦終了させる。この緊急止水モードは、例えば、自然環境水域Ｒｊｐ１にて河川の氾濫が想定されるような場合に採られる運転モードであり、自然環境水域Ｒｊｐ１には、付属浄化施設５０にて浄化済みとはいえ、その浄化済み下水を排出しないようにする。つまり、浄化制御装置６０は、下水分配弁４２による取水下水流量を低減した上で、付属浄化施設５０をアイドル状態の浄化とするように、緊急止水モードで付属浄化施設５０を駆動制御する。緊急止水ファクターは、自治体や広域連合からの要請により設定したり、河川管理組合等から発せられる河川状況データにより設定される。また、浄化済み下水の排出先については、付属排水流路５２を流れる下水全量を環流浄化流路７２にて環流させるよう、流路切換弁７０を切換制御する。こうすることで、付属浄化施設５０をアイドル状態で継続して浄化運転させたまま、その浄化済み下水を、付属排水流路５２および施設外排水流路５３を経て自然環境水域Ｒｊｐ１に排出しないようにできる。この場合、環流浄化流路７２からの環流により付属浄化施設５０のオーバーフローが起きないよう、下水分配弁４２からの取水を停止して、閉じられた系にて付属浄化施設５０をアイドル状態で浄化運転したり、一時的に停止制御することもできる。或いは、浄化済み下水の排出先にリターン排出流路７３も加え、リターン排出流路７３から合流弁４３を経て公共下水流路Ｇｐに浄化済み下水を排出するようにしてもよい。なお、ここで言う付属浄化施設５０のアイドル状態の浄化運転は、付属浄化施設５０における各槽での下水循環や曝気等の浄化処理が、その駆動機器の運転範囲の下限近くでなされていることを意味する。   Next, the purification control of the attached purification facility 50 in an operation mode other than the above-described steady operation mode will be described with reference to FIG. In step S110 described above, when it is determined that the current operation mode is not the steady operation mode from the setting state of the emergency water stop factor and the operation state of the control stop switch, the purification control device 60 requests the emergency water stop. It is determined whether or not there is (step S140). This determination is made based on the setting status of the emergency water stop factor, and when the emergency water stop factor is set, the purification control device 60 drives and controls the attached purification facility 50 in the emergency water stop mode (step S150). ), This routine is temporarily terminated. This emergency water stop mode is, for example, an operation mode that is adopted when river flooding is assumed in the natural environment water area Rjp1, and that the natural environment water area Rjp1 has been purified by the attached purification facility 50. No, do not discharge the purified sewage. That is, the purification control device 60 drives and controls the attached purification facility 50 in the emergency water stop mode so that the attached purification facility 50 is set in the idle state after reducing the flow rate of the intake sewage by the sewage distribution valve 42. The emergency water stop factor is set by a request from a local government or a wide-area union, or by river condition data issued by a river management association or the like. In addition, with respect to the discharge destination of the purified sewage, the flow path switching valve 70 is controlled so that the entire amount of sewage flowing through the attached drainage flow path 52 is circulated in the recirculation purification flow path 72. By doing so, the purified sewage is not discharged into the natural environment water area Rjp1 through the attached drainage channel 52 and the facility drainage channel 53 while the attached purification facility 50 is continuously operated in the idle state. Can be. In this case, water intake from the sewage distribution valve 42 is stopped and the auxiliary purification facility 50 is purified in an idle state in a closed system so that the auxiliary purification facility 50 does not overflow due to the recirculation from the recirculation flow passage 72. It can be operated or temporarily stopped. Alternatively, the return discharge channel 73 may be added to the destination of the purified sewage, and the purified sewage may be discharged from the return discharge channel 73 through the junction valve 43 to the public sewage channel Gp. In addition, the purification operation in the idle state of the attached purification facility 50 referred to here is that purification treatment such as sewage circulation and aeration in each tank in the attached purification facility 50 is performed near the lower limit of the operation range of the driving device. Means.

ステップＳ１１０での否定判定およびステップＳ１４０での否定判定に続くステップＳ１６０では、浄化制御装置６０は、現状の運転モードは制御停止スイッチ等の操作により停止要請があるとして、付属浄化施設５０を停止モードで駆動制御し（ステップＳ１５０）、本ルーチンを一旦終了させる。この停止モードは、付属浄化施設５０の保守点検等による運転停止の要請に対応した運転モードであり、下水分配弁４２による取水を停止した上で、付属浄化施設５０についてもその運転を一時的に停止する。こうすることで、保守点検を要する付属浄化施設５０には下水が流れ込まないようにして、上水使用施設ＪＹからの下水の全てを、未浄化下水として、施設内下水流路４０と公共下水流路Ｇｐを経て下水浄化処理施設ＧＪＰに排出できる。また、付属浄化施設５０に残存する下水を、付属浄化施設５０に設定した図示しないポンプ等により、強制的にリターン排出流路７３から公共下水流路Ｇｐを経て下水浄化処理施設ＧＪＰに排出してもよい。   In step S160 following the negative determination in step S110 and the negative determination in step S140, the purification control device 60 sets the attached purification facility 50 in the stop mode, assuming that the current operation mode is requested to stop by operating the control stop switch or the like. The driving control is performed (step S150), and this routine is temporarily terminated. This stop mode is an operation mode corresponding to a request for operation stop by maintenance inspection of the attached purification facility 50, and after the water intake by the sewage distribution valve 42 is stopped, the operation of the attached purification facility 50 is temporarily performed. Stop. In this way, all the sewage from the water use facility JY is treated as unpurified sewage so that the sewage does not flow into the attached purification facility 50 requiring maintenance and inspection, and the in-facility sewage flow path 40 and the public sewage flow. It can be discharged to the sewage purification facility GJP via the road Gp. Further, the sewage remaining in the attached purification facility 50 is forcibly discharged from the return discharge passage 73 to the sewage purification treatment facility GJP through the public drainage passage Gp by a pump (not shown) set in the attached purification facility 50. Also good.

以上説明した本実施形態の下水排出方法が適用された下水浄化システムＪＧＳでは、上水使用施設ＪＹから排出される下水を付属浄化施設５０で浄化して自然環境水域Ｒｊｐ１に排出するに当たり、付属浄化施設５０の浄化済み下水について指標計測器５４で計測した計測水質管理パラメータが水質管理パラメータを継続して充足していると（ステップＳ１３４：肯定判定）、付属浄化施設５０の浄化済みの下水を、流路切換弁７０による流路切換を経て、自然環境水域Ｒｊｐ１に排出する（ステップＳ１３５）。しかも、本実施形態の下水排出方法が適用された下水浄化システムＪＧＳでは、付属浄化施設５０の浄化済み下水について指標計測器５４で計測した計測水質管理パラメータが水質管理パラメータを充足していない状況下では（ステップＳ１３４：否定判定）、指標計測器５４より下流側に設けた流路切換弁７０により自然環境水域Ｒｊｐ１への排出を停止すると共に、付属浄化施設５０の浄化済み下水を、下水浄化処理施設ＧＪＰに到る公共下水流路Ｇｐに流路切換弁７０から送り込んだり、流路切換弁７０から環流浄化流路７２を経て付属浄化施設５０に循環させる（ステップＳ１３７）。よって、本実施形態の下水排出方法が適用された下水浄化システムＪＧＳによれば、浄化済み下水の上記した排出先切換により、水質管理パラメータを満たす放流許容水質まで実際に浄化された下水しか自然環境水域Ｒｊｐ１に排出しないようにできる。この点につき、以下に詳述する。   In the sewage purification system JGS to which the sewage discharge method of this embodiment described above is applied, the sewage discharged from the water use facility JY is purified by the attached purification facility 50 and discharged to the natural environment water area Rjp1. When the measured water quality management parameter measured by the index measuring instrument 54 for the purified sewage of the facility 50 continues to satisfy the water quality management parameter (step S134: affirmative determination), the purified sewage of the attached purification facility 50 is The flow is switched to the natural environment water area Rjp1 through the flow path switching by the flow path switching valve 70 (step S135). Moreover, in the sewage purification system JGS to which the sewage discharge method of this embodiment is applied, the measured water quality management parameter measured by the index measuring instrument 54 for the purified sewage in the attached purification facility 50 does not satisfy the water quality management parameter. Then (step S134: negative determination), the discharge to the natural environment water area Rjp1 is stopped by the flow path switching valve 70 provided on the downstream side of the index measuring instrument 54, and the purified sewage of the attached purification facility 50 is treated with the sewage purification process. The water is sent from the flow path switching valve 70 to the public sewage flow path Gp reaching the facility GJP, or is circulated from the flow path switching valve 70 to the attached purification facility 50 via the circulation purification flow path 72 (step S137). Therefore, according to the sewage purification system JGS to which the sewage discharge method of the present embodiment is applied, only the sewage actually purified to the discharge allowable water quality that satisfies the water quality management parameters by the above-described discharge destination switching by the purified sewage is the natural environment. It is possible not to discharge to the water area Rjp1. This point will be described in detail below.

計測待機時間ごとに指標計測器５４から得られる計測水質管理パラメータが水質管理パラメータを継続して充足していると言うことは（ステップＳ１３４：肯定判定）、計測水質管理パラメータが水質管理パラメータを充足している継続回数分の計測待機時間に亘って、浄化済み下水は放流許容水質を満たしている。よって、この場合は、放流許容水質まで実際に浄化された下水しか自然環境水域Ｒｊｐ１に排出されない。   The fact that the measured water quality management parameter obtained from the index measuring instrument 54 for each measurement standby time continues to satisfy the water quality management parameter (step S134: affirmative determination) means that the measured water quality management parameter satisfies the water quality management parameter. The purified sewage satisfies the discharge allowable water quality over the measurement waiting time corresponding to the number of continuous operations. Therefore, in this case, only the sewage actually purified to the discharge allowable water quality is discharged to the natural environment water area Rjp1.

また、前回の制御ルーチンにおいて指標計測器５４から得られた計測水質管理パラメータが水質管理パラメータを充足しておらず、今回の制御ルーチンにおいて指標計測器５４から得られた計測水質管理パラメータが水質管理パラメータを充足した場合の計測待機時間、即ち水質向上推移時の計測待機期間では、ステップＳ１３１の否定判定を経て、付属浄化施設５０の浄化済み下水の排出先は、前回の制御ルーチンで規定された排出先が維持される。この場合には、前回の制御ルーチンで規定された排出先は、計測水質管理パラメータが水質管理パラメータを充足していなかったことから、自然環境水域Ｒｊｐ１に到る施設外排水流路５３以外の環流浄化流路７２かリターン排出流路７３であるので、この排出先が維持される。よって、上記した水質向上推移時の計測待機期間においては、浄化済み下水は自然環境水域Ｒｊｐ１に排出されない。そして、この水質向上推移時の計測待機期間における浄化済み下水は、放流許容水質まで浄化されたか不明であるが、環流浄化流路７２かリターン排出流路７３に排出されるのであって、施設外排水流路５３を経て自然環境水域Ｒｊｐ１には排出されない。このことは、放流許容水質まで実際に浄化された下水しか自然環境水域Ｒｊｐ１に排出しないことと同義である。   Further, the measured water quality management parameter obtained from the index measuring instrument 54 in the previous control routine does not satisfy the water quality management parameter, and the measured water quality management parameter obtained from the index measuring instrument 54 in the current control routine is the water quality management. In the measurement standby time when the parameters are satisfied, that is, the measurement standby period at the time of the water quality improvement transition, the destination of the purified sewage discharged from the attached purification facility 50 is defined in the previous control routine through a negative determination in step S131. The discharge destination is maintained. In this case, since the discharge destination specified in the previous control routine is that the measured water quality management parameter does not satisfy the water quality management parameter, the circulation flow other than the facility outside drainage flow path 53 reaching the natural environment water area Rjp1. Since it is the purification flow path 72 or the return discharge flow path 73, this discharge destination is maintained. Therefore, the purified sewage is not discharged to the natural environment water area Rjp1 during the measurement standby period when the water quality is improved. And it is unclear whether the purified sewage in the measurement waiting period during the water quality improvement transition has been purified to the discharge allowable water quality, but it is discharged to the recirculation purification flow path 72 or the return discharge flow path 73, and is outside the facility. It is not discharged to the natural environment water area Rjp1 through the drainage flow channel 53. This is synonymous with the fact that only the sewage that has actually been purified to the discharge allowable water quality is discharged into the natural environment water area Rjp1.

これに加え、前回の制御ルーチンにおいて指標計測器５４から得られた計測水質管理パラメータが水質管理パラメータを充足しており、今回の制御ルーチンにおいて指標計測器５４から得られた計測水質管理パラメータが水質管理パラメータを充足していなかった場合の計測待機時間、即ち水質低下推移時の計測待機期間では、ステップＳ１３１の否定判定を経て、付属浄化施設５０の浄化済み下水の排出先は、前回の制御ルーチンで規定された排出先が維持される。この場合には、前回の制御ルーチンで規定された排出先は、計測水質管理パラメータが水質管理パラメータを充足していたことから、自然環境水域Ｒｊｐ１に到る施設外排水流路５３が維持される。しかしながら、処理水貯留域５１は、上記の水質低下推移時の計測待機時間に亘って浄化された浄化済み下水を貯留しているので、自然環境水域Ｒｊｐ１に到る施設外排水流路５３が維持されていても、水質低下推移時の計測待機時間に亘って浄化された浄化済み下水は自然環境水域Ｒｊｐ１に排出されない。そして、この水質低下推移時の計測待機期間における浄化済み下水は、放流許容水質まで浄化されたか不明であるが、処理水貯留域５１に貯め置かれるのであって、施設外排水流路５３を経て自然環境水域Ｒｊｐ１には排出されない。このことも、放流許容水質まで実際に浄化された下水しか自然環境水域Ｒｊｐ１に排出しないことと同義である。以上より、本実施形態の下水排出方法が適用された下水浄化システムＪＧＳによれば、放流許容水質を担保した浄化済み下水の自然環境水域Ｒｊｐ１への放出の信頼性を高めることができる。また、本実施形態の下水排出方法が適用された下水浄化システムＪＧＳによれば、自然環境水域Ｒｊｐ１に排出する分の水量の浄化済み下水を下水浄化処理施設ＧＪＰに排出しないようにできるので、下水浄化処理施設ＧＪＰの浄化負荷を軽減できる。なお、水質低下推移時の計測待機期間の経過後は、その際の計測水質管理パラメータが水質管理パラメータを充足していないので、図３のステップＳ１３３の否定判定を受けて、浄化済み下水は、その排出先が施設外排水流路５３以外の環流浄化流路７２やリターン排出流路７３となり（ステップＳ１３６）、施設外排水流路５３を経て自然環境水域Ｒｊｐ１には排出されない。   In addition to this, the measured water quality management parameter obtained from the index measuring instrument 54 in the previous control routine satisfies the water quality management parameter, and the measured water quality management parameter obtained from the index measuring instrument 54 in the current control routine is the water quality. In the measurement standby time when the management parameters are not satisfied, that is, in the measurement standby period when the water quality is lowered, the negative destination of step S131 is passed, and the discharge destination of the purified sewage of the attached purification facility 50 is the previous control routine. The destination specified in is maintained. In this case, since the discharge destination specified in the previous control routine is that the measured water quality management parameter satisfies the water quality management parameter, the out-of-facility drainage flow path 53 reaching the natural environment water area Rjp1 is maintained. . However, since the treated water storage area 51 stores the purified sewage purified over the measurement waiting time at the time of the above-described deterioration in water quality, the outside facility drainage flow path 53 reaching the natural environment water area Rjp1 is maintained. Even if it is done, the purified sewage purified over the measurement waiting time at the time of transition of the water quality decline is not discharged to the natural environment water area Rjp1. And it is unclear whether the purified sewage in the measurement waiting period at the time of this water quality transition has been purified to the discharge allowable water quality, but it is stored in the treated water storage area 51, and passes through the drainage channel 53 outside the facility. It is not discharged into the natural environment water area Rjp1. This is also synonymous with the fact that only the sewage actually purified to the discharge allowable water quality is discharged into the natural environment water area Rjp1. As described above, according to the sewage purification system JGS to which the sewage discharge method of the present embodiment is applied, it is possible to improve the reliability of the release of the purified sewage that guarantees the discharge allowable water quality into the natural environment water area Rjp1. In addition, according to the sewage purification system JGS to which the sewage discharge method of the present embodiment is applied, it is possible to prevent the purified sewage of the amount of water to be discharged to the natural environment water area Rjp1 from being discharged to the sewage purification treatment facility GJP. The purification load of the purification treatment facility GJP can be reduced. In addition, after the elapse of the measurement standby period at the time of the water quality transition, since the measured water quality management parameter at that time does not satisfy the water quality management parameter, the negative sewage in step S133 in FIG. The discharge destination is the recirculation purification flow path 72 and the return discharge flow path 73 other than the facility drainage flow path 53 (step S136), and is not discharged to the natural environment water area Rjp1 via the facility drainage flow path 53.

本実施形態の下水排出方法が適用された下水浄化システムＪＧＳでは、付属浄化施設５０は、上水使用施設ＪＹから排出される下水の全量を放流許容水質となるまで浄化可能な浄化能力を備え、この付属浄化施設５０に上水使用施設ＪＹから排出される下水の全量を取水して下水の浄化を図る。よって、計測水質管理パラメータが水質管理パラメータを充足している状況下（ステップＳ１３３：肯定判定状況下）では、浄化済み下水の全量が自然環境水域Ｒｊｐ１に排出され、計測水質管理パラメータが水質管理パラメータを充足していない状況下（ステップＳ１３３：否定判定状況下）に限って、付属浄化施設５０で浄化済みの下水をリターン排出流路７３を介して下水浄化処理施設ＧＪＰに排出するに過ぎない。この結果、本実施形態の下水排出方法が適用された下水浄化システムＪＧＳによれば、下水浄化処理施設ＧＪＰへの排出下水量を少なくでき、下水排出に伴う下水道コストも低減できる。   In the sewage purification system JGS to which the sewage discharge method of the present embodiment is applied, the attached purification facility 50 has a purification capability capable of purifying the entire amount of sewage discharged from the water use facility JY until the discharge water quality becomes acceptable, The entire amount of sewage discharged from the water use facility JY is taken into the attached purification facility 50 to purify the sewage. Therefore, under the situation where the measured water quality management parameter satisfies the water quality management parameter (step S133: under the affirmative determination situation), the entire amount of purified sewage is discharged into the natural environment water area Rjp1, and the measured water quality management parameter is the water quality management parameter. The sewage that has been purified by the attached purification facility 50 is only discharged to the sewage purification treatment facility GJP via the return discharge channel 73 only in a situation where the above is not satisfied (step S133: under a negative determination situation). As a result, according to the sewage purification system JGS to which the sewage discharge method of this embodiment is applied, the amount of discharged sewage to the sewage purification treatment facility GJP can be reduced, and the sewage cost associated with sewage discharge can also be reduced.

本実施形態の下水排出方法が適用された下水浄化システムＪＧＳでは、下水分配弁４２にて取水した下水を放流許容水質となるまで浄化するための水質管理パラメータを、下水浄化処理施設ＧＪＰが浄化済み下水について規定する水質管理パラメータに倣った指標とする。このため、上水使用施設ＪＹの付属浄化施設５０で浄化して自然環境水域Ｒｊｐ１に排出する浄化済み下水の水質を、下水浄化処理施設ＧＪＰで浄化して排出される下水の水質と同程度とできるので、自然環境水域Ｒｊｐ１への放流が許容される放流許容水質となるまでの下水浄化をより確実に担保できる。   In the sewage purification system JGS to which the sewage discharge method of the present embodiment is applied, the sewage purification treatment facility GJP has purified the water quality management parameters for purifying the sewage taken by the sewage distribution valve 42 until the discharge water quality becomes acceptable. This is an index that follows the water quality management parameters specified for sewage. For this reason, the quality of the purified sewage purified by the attached purification facility 50 of the water use facility JY and discharged to the natural environment water area Rjp1 is about the same as the quality of the sewage purified and discharged by the sewage purification treatment facility GJP. Therefore, the purification of sewage can be ensured more reliably until the discharge water quality allows the discharge to the natural environment water area Rjp1.

本実施形態の下水排出方法が適用された下水浄化システムＪＧＳでは、ＴＯＣの計測水質管理パラメータが水質管理パラメータを充足していなければ、ＴＯＣが水質管理パラメータを満たす側に付属浄化施設５０の薬液処理槽において浄化薬液を増量注入したり、攪拌機等の浄化機器の浄化活性制御を行う（ステップＳ１３６）。このため、自然環境水域Ｒｊｐ１への放流が許容される放流許容水質となるまでの下水浄化を早期のうちに達成できる。   In the sewage purification system JGS to which the sewage discharge method of this embodiment is applied, if the measured water quality management parameter of the TOC does not satisfy the water quality management parameter, the chemical treatment of the attached purification facility 50 is performed on the side where the TOC satisfies the water quality management parameter. An increased amount of the purifying chemical solution is injected into the tank, or purifying activity control of a purifying device such as a stirrer is performed (step S136). For this reason, sewage purification can be achieved at an early stage until the discharge water quality that allows discharge into the natural environment water area Rjp1 is obtained.

本発明は、上述の実施形態に限られるものではなく、その趣旨を逸脱しない範囲において種々の構成で実現することができる。例えば、発明の概要の欄に記載した各形態中の技術的特徴に対応する実施形態の技術的特徴は、上述の課題の一部又は全部を解決するために、あるいは、上述の効果の一部又は全部を達成するために、適宜、差し替えや、組み合わせを行うことが可能である。また、その技術的特徴が本明細書中に必須なものとして説明されていなければ、適宜、削除することが可能である。   The present invention is not limited to the above-described embodiment, and can be realized with various configurations without departing from the spirit of the present invention. For example, the technical features of the embodiments corresponding to the technical features in each embodiment described in the summary section of the invention are intended to solve part or all of the above-described problems, or part of the above-described effects. Or, in order to achieve the whole, it is possible to replace or combine as appropriate. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

既述した実施形態では、計測水質管理パラメータが２回継続して水質管理パラメータを充足していると、付属浄化施設５０の浄化済み下水の排出先を自然環境水域Ｒｊｐ１に切り換えるが（ステップＳ１３３−１３５）、計測水質管理パラメータが水質管理パラメータの未充足の状態から充足に推移（水質向上推移）した時点で、付属浄化施設５０の浄化済み下水の排出先を自然環境水域Ｒｊｐ１に切り換えてもよい。具体的には、図４に示すステップＳ１３４を省略してもよい。こうすれば、水質向上推移を起こした計測待機時間における浄化済み下水は、自然環境水域Ｒｊｐ１への放流が許容される放流許容水質であると断定できないものの、放流許容水質に近似した水質の浄化済み下水であって、計測待機時間における浄化済み下水の流量は、例えば終日稼働の付属浄化施設５０が浄化処理する下水流量に比べれば、極めて少量である。よって、一日を単位に自然環境水域Ｒｊｐ１への浄化済み下水の放出を評価するとすれば、水質向上推移した時点で浄化済み下水の排出先を自然環境水域Ｒｊｐ１に切り換えても、実質的に放流許容水質とされた浄化済み下水を自然環境水域Ｒｊｐ１に放出できる、と言える。また、計測水質管理パラメータが３回以上継続して水質管理パラメータを充足した場合に、付属浄化施設５０の浄化済み下水の排出先を自然環境水域Ｒｊｐ１に切り換えてもよい。こうすれば、自然環境水域Ｒｊｐ１への放流が許容される放流許容水質となるまでの下水浄化の確実性がより高まる。   In the above-described embodiment, when the measured water quality management parameter continues twice and satisfies the water quality management parameter, the purified sewage discharge destination of the attached purification facility 50 is switched to the natural environment water area Rjp1 (step S133-). 135), when the measured water quality management parameter changes from the unsatisfactory state of the water quality management parameter to the satisfaction (water quality improvement transition), the discharge destination of the purified sewage of the attached purification facility 50 may be switched to the natural environment water area Rjp1. . Specifically, step S134 shown in FIG. 4 may be omitted. In this way, although the purified sewage during the measurement waiting time that caused the water quality improvement transition cannot be determined as the discharge allowable water quality that is allowed to be discharged into the natural environment water area Rjp1, the water quality that has been approximated to the discharge allowable water quality has been purified. The flow rate of purified sewage during the measurement standby time is extremely small compared to the flow rate of sewage purified by the attached purification facility 50 that operates all day, for example. Therefore, if the release of purified sewage to the natural environment water area Rjp1 is evaluated on a day-by-day basis, even if the destination of the purified sewage is switched to the natural environment water area Rjp1 when the water quality is improved, it will be discharged substantially. It can be said that purified sewage having an acceptable water quality can be discharged to the natural environment water area Rjp1. In addition, when the measured water quality management parameter continues three times or more and satisfies the water quality management parameter, the discharge destination of the purified sewage of the attached purification facility 50 may be switched to the natural environment water area Rjp1. In this way, the certainty of sewage purification until the discharge allowable water quality that allows discharge into the natural environment water area Rjp1 is increased.

既述した実施形態では、自然環境水域Ｒｊｐ１への放流が許容される放流許容水質の目処となる指標を、指標１：水素イオン濃度（ｐＨ）と指標２：浮遊物質量（ＳＳ）と指標３：全有機炭素（ＴＯＣ）としたが、動植物油脂類含有量、銅含有量、亜鉛含有量などを指標として用いてもよい。   In the embodiment described above, the index serving as the target of the discharge allowable water quality that is allowed to be discharged into the natural environment water area Rjp1 is as follows: Index 1: Hydrogen ion concentration (pH), Index 2: Suspended matter amount (SS), and Index 3 : Total organic carbon (TOC), but animal and vegetable oils and fats content, copper content, zinc content and the like may be used as indicators.

既述した実施形態では、計測水質管理パラメータが水質管理パラメータを充足していない場合において、ＴＯＣが水質管理パラメータを満たす側への浄化薬液の増量注入と浄化機器の浄化活性制御とを行ったが、浄化改善に有益ないずれか一方を行うようにしてもよい。   In the embodiment described above, in the case where the measured water quality management parameter does not satisfy the water quality management parameter, the increase in the amount of the purification chemical solution to the side where the TOC satisfies the water quality management parameter and the purification activity control of the purification equipment are performed. Any one of those beneficial to purification improvement may be performed.

既述した実施形態では、付属浄化施設５０を複数の曝気槽や沈殿槽、薬品処理槽を備えるものとしたが、自然環境水域への放流が許容される放流許容水質となるまでの浄化が可能であれば、単一の処理槽、例えば、高温環境下で活性炭を貯留した処理槽を用い、この高温活性炭で下水を浄化する浄化施設を用いてもよい。   In the embodiment described above, the attached purification facility 50 is provided with a plurality of aeration tanks, sedimentation tanks, and chemical treatment tanks. However, it is possible to purify the water until it reaches the discharge allowable water quality that allows discharge into the natural environment water area. If so, a single treatment tank, for example, a treatment tank storing activated carbon in a high temperature environment, and a purification facility for purifying sewage with this high temperature activated carbon may be used.

１０…上水流量計測機器
２０…上水分配流路
３０…集合下水流路
４０…施設内下水流路
４２…下水分配弁
４３…合流弁
５０…付属浄化施設
５１…処理水貯留域
５２…付属排水流路
５３…施設外排水流路
５４…指標計測器
６０…浄化制御装置
６２…制御装置
６３…データ更新部
６４…センサー群
６６…駆動機器群
６８…放水規制データベース
７０…流路切換弁
７２…環流浄化流路
７３…リターン排出流路
８０…下水流量計測機器
ＧＪＰ…下水浄化処理施設
Ｇｐ…公共下水流路
Ｈ…一般住居
Ｆ…工場
ＪＧＳ…下水浄化システム
ＪＳ…上水施設
ＪＳｐ…上水道流路
ＪＹ…上水使用施設
ＮＷ…インターネット
Ｒｇｊｐ…自然環境水域
Ｒｊｐ１…自然環境水域 DESCRIPTION OF SYMBOLS 10 ... Water flow rate measuring device 20 ... Water distribution channel 30 ... Collective sewage channel 40 ... In-facility sewage channel 42 ... Sewage distribution valve 43 ... Merge valve 50 ... Attached purification facility 51 ... Treated water storage area 52 ... Attached Drainage channel 53 ... Drainage channel outside facility 54 ... Indicator measuring device 60 ... Purification control device 62 ... Control device 63 ... Data update unit 64 ... Sensor group 66 ... Drive equipment group 68 ... Water discharge regulation database 70 ... Channel switching valve 72 ... recirculation purification flow path 73 ... return discharge flow path 80 ... sewage flow measurement device GJP ... sewage purification treatment facility Gp ... public sewage flow path H ... general dwelling house F ... factory JGS ... sewage purification system JS ... water supply facility JSp ... water supply flow Road JY ... Water use facility NW ... Internet Rgjp ... Natural environment water area Rjp1 ... Natural environment water area

Claims (5)

上水を使用して生じる下水を排出する上水使用施設における下水排出方法であって、
前記上水使用施設から排出される前記下水を取水し、該取水した下水を、自然環境水域への放流が許容される放流許容水質となるまで浄化可能な付属浄化施設で浄化する工程（１）と、
前記取水した下水についての前記放流許容水質の判断に用いられる水質管理パラメータを、前記工程（１）で浄化済み下水について指標計測器で計測し、該計測した計測水質管理パラメータが前記水質管理パラメータを満たしているかを判定する工程（２）と、
該工程（２）で前記計測水質管理パラメータが前記水質管理パラメータを満たすとの判定が得られた状況において、前記工程（１）の前記付属浄化施設で浄化済みの下水を、前記自然環境水域に到る排水流路に排出する工程（３）とを備え、
更に、前記工程（３）では、
前記工程（２）で前記計測水質管理パラメータが前記水質管理パラメータを満たすとの判定が得られていない状況下においては、前記指標計測器より下流側に設けた流路切換弁により前記自然環境水域に到る排水流路への排出を停止すると共に、前記付属浄化施設で浄化済みの下水を、前記上水使用施設が属する自治体もしくは近隣の自治体が連携した広域連合が運営する下水浄化処理施設に到る公共下水流路に前記流路切換弁から送り込む、または前記流路切換弁から前記付属浄化施設に循環させる、下水排出方法。 A method for discharging sewage in a facility for using sewage that discharges sewage generated by using sewage,
The step (1) of taking the sewage discharged from the water use facility and purifying the collected sewage at an attached purification facility capable of being purified until it has a discharge-permitted water quality that allows discharge into a natural environment water area. When,
The water quality management parameter used for the determination of the discharge allowable water quality for the taken-up sewage is measured with an index measuring instrument for the sewage that has been purified in the step (1), and the measured water quality management parameter represents the water quality management parameter. A step (2) of determining whether or not it is satisfied;
In the situation where it is determined in the step (2) that the measured water quality management parameter satisfies the water quality management parameter, the sewage purified at the attached purification facility in the step (1) is supplied to the natural environment water area. And a step (3) of discharging to the drainage channel to reach,
Furthermore, in the step (3),
In a situation where it is not determined that the measured water quality management parameter satisfies the water quality management parameter in the step (2), the natural environment water area is provided by a flow path switching valve provided downstream of the index measuring instrument. The sewage that has been purified by the attached purification facility is treated as a sewage purification treatment facility operated by a wide-area federation in which the municipality to which the water-use facility belongs or a neighboring municipality cooperates. A sewage discharge method, wherein the sewage is discharged from the flow path switching valve to the public sewage flow path, or circulated from the flow path switching valve to the attached purification facility. 請求項１に記載の下水排出方法であって、
前記工程（１）で用いる前記付属浄化施設は、前記上水使用施設から排出される前記下水の全量を、前記放流許容水質となるまで浄化可能とされ、
前記工程（１）では、前記上水使用施設から排出される前記下水の全量を取水する、下水排出方法。 A method for discharging sewage according to claim 1,
The attached purification facility used in the step (1) is capable of purifying the entire amount of the sewage discharged from the water use facility until the discharge allowable water quality is achieved.
In the step (1), a sewage discharge method, wherein the entire amount of the sewage discharged from the water use facility is taken. 請求項１または請求項２に記載の下水排出方法であって、
前記工程（２）で用いる前記指標計測器は、前記計測水質管理パラメータが前記水質管理パラメータを満たしているとの判定を得るに必要な判定所要時間を越える計測タイミングで前記水質管理パラメータを繰り返し計測し、
前記工程（２）では、前記計測水質管理パラメータが前記水質管理パラメータを満たしているとの判定が予め定めた回数に亘って継続して得られると、前記計測水質管理パラメータが前記水質管理パラメータを満たしていると判定する、下水排出方法。 A method for discharging sewage according to claim 1 or claim 2,
The index measuring instrument used in the step (2) repeatedly measures the water quality management parameter at a measurement timing exceeding a required time required for obtaining a determination that the measured water quality management parameter satisfies the water quality management parameter. And
In the step (2), when the determination that the measured water quality management parameter satisfies the water quality management parameter is continuously obtained for a predetermined number of times, the measured water quality management parameter sets the water quality management parameter to A sewage discharge method that determines that it satisfies 請求項１から請求項３のいずれか一項に記載の下水排出方法であって、
前記工程（２）では、前記取水した下水を前記放流許容水質となるまで浄化するための水質管理パラメータを、前記下水浄化処理施設が浄化済み下水について規定する水質管理パラメータに倣った指標とする、下水排出方法。 A sewage discharge method according to any one of claims 1 to 3,
In the step (2), the water quality management parameter for purifying the taken sewage until it becomes the discharge allowable water quality is set as an index following the water quality management parameter defined for the purified sewage by the sewage purification treatment facility. Sewage discharge method. 上水を使用して生じる下水を排出する上水使用施設における下水浄化システムであって、
前記上水使用施設から排出される前記下水を取水し、該取水した下水を、自然環境水域への放流が許容される放流許容水質となるまで浄化可能な付属浄化施設と、
前記取水した下水の前記放流許容水質の判断に用いられる水質管理パラメータを、前記付属浄化施設で浄化済み下水について指標計測器で計測し、該計測した計測水質管理パラメータが前記水質管理パラメータを満たしているかを判定するパラメータ判定部と、
該パラメータ判定部で前記計測水質管理パラメータが前記水質管理パラメータを満たすとの判定が得られた状況において、前記付属浄化施設で浄化済みの下水を、前記自然環境水域に到る排水流路に排出する排出機構部とを備え、
更に、排出機構部は、
前記パラメータ判定部で前記計測水質管理パラメータが前記水質管理パラメータを満たすとの判定が得られていない状況下においては、前記指標計測器より下流側に設けた流路切換弁により前記自然環境水域に到る排水流路への排出を停止すると共に、前記付属浄化施設で浄化済みの下水を、前記上水使用施設が属する自治体もしくは近隣の自治体が連携した広域連合が運営する下水浄化処理施設に到る公共下水流路に前記流路切換弁から送り込む、または前記流路切換弁から前記付属浄化施設に循環させる、下水浄化システム。 A sewage purification system in a facility for using sewage that discharges sewage generated by using sewage,
An attached purification facility capable of purifying the sewage discharged from the water use facility, and purifying the collected sewage until it has a discharge-permitted water quality that allows discharge into a natural environment water area;
The water quality management parameter used to determine the discharge allowable water quality of the taken sewage is measured with an index measuring instrument for the sewage purified at the attached purification facility, and the measured water quality management parameter satisfies the water quality management parameter. A parameter determination unit for determining whether or not
In a situation where the parameter determination unit determines that the measured water quality management parameter satisfies the water quality management parameter, the sewage purified by the attached purification facility is discharged to a drainage channel that reaches the natural environment water area. And a discharge mechanism that
Furthermore, the discharge mechanism
In a situation where it is not determined that the measured water quality management parameter satisfies the water quality management parameter in the parameter judgment unit, the flow path switching valve provided on the downstream side of the index measuring instrument causes the natural environment water area to enter. In addition to stopping the discharge to the drainage channel, the sewage purified by the attached purification facility reaches a sewage purification treatment facility operated by a wide-area federation in which the municipality to which the facility for using water supply belongs or a neighboring municipality cooperates. A sewage purification system that feeds into a public sewage flow path from the flow path switching valve or circulates from the flow path switching valve to the attached purification facility.
JP2017082590A 2017-04-19 2017-04-19 Sewage discharge method and sewage purification system Active JP6168545B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017082590A JP6168545B1 (en) 2017-04-19 2017-04-19 Sewage discharge method and sewage purification system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017082590A JP6168545B1 (en) 2017-04-19 2017-04-19 Sewage discharge method and sewage purification system

Publications (2)

Publication Number Publication Date
JP6168545B1 true JP6168545B1 (en) 2017-07-26
JP2018178621A JP2018178621A (en) 2018-11-15

Family

ID=59384307

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017082590A Active JP6168545B1 (en) 2017-04-19 2017-04-19 Sewage discharge method and sewage purification system

Country Status (1)

Country Link
JP (1) JP6168545B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110657844B (en) * 2019-10-18 2020-12-29 安徽世纪科技咨询服务有限公司 Sewage discharge capacity detection equipment for environmental monitoring and detection method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007002474A (en) * 2005-06-22 2007-01-11 Mitsubishi Electric Corp Integrated operation management method for sewage treatment plant
JP2014012927A (en) * 2012-07-03 2014-01-23 Vertex Japan Co Ltd Sewage discharge method
JP2015107464A (en) * 2013-12-05 2015-06-11 三菱重工業株式会社 Circulating water utilization system
JP2016217895A (en) * 2015-05-21 2016-12-22 株式会社ヴェルテックスジャパン Sewage flow rate measurement system and sewage flow rate measurement method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007002474A (en) * 2005-06-22 2007-01-11 Mitsubishi Electric Corp Integrated operation management method for sewage treatment plant
JP2014012927A (en) * 2012-07-03 2014-01-23 Vertex Japan Co Ltd Sewage discharge method
JP2015107464A (en) * 2013-12-05 2015-06-11 三菱重工業株式会社 Circulating water utilization system
JP2016217895A (en) * 2015-05-21 2016-12-22 株式会社ヴェルテックスジャパン Sewage flow rate measurement system and sewage flow rate measurement method

Also Published As

Publication number Publication date
JP2018178621A (en) 2018-11-15

Similar Documents

Publication Publication Date Title
US6245224B1 (en) Water quality management system
CA2531764C (en) Biological water treatment process and plant using activated sludge with regulation of aeration
CN109534501B (en) A kind of monitoring and managing method of rural domestic sewage treatment facility
JP5512032B1 (en) Circulating water usage system charging device, circulating water usage system
US9783963B2 (en) Safety device for circulating water utilization system and circulating-water utilization system
CN105442670B (en) A kind of building water supply pipeline circulatory system and method ensured for secondary water-supply water quality
CN108532720A (en) Multifunctional rain storage pond intelligence control system and control method
JP7344328B2 (en) Operation control device and operation control method for wastewater treatment equipment
CN109542150B (en) Method for adjusting water inlet load of rural domestic sewage treatment facilities
JP6168545B1 (en) Sewage discharge method and sewage purification system
JP5087713B1 (en) Sewage discharge method
Gin et al. Comparison of nutrient limitation in freshwater and estuarine reservoirs in tropical urban Singapore
JP2020151611A (en) Water treatment plant operation support device and water treatment plant
JPH07119184A (en) Operating apparatus for water supply and sewerage system
KR20150064574A (en) Energy-saving system for treatment of wastewater and method for control of the same
KR102396986B1 (en) Intelligent water treatment process management system based on machine learning platform
JP3707526B2 (en) Waste water nitrification method and apparatus
CN210030157U (en) Sequencing batch biofilm reactor device
CN109362638B (en) Control system for circulating water treatment equipment of fish proliferation releasing station
JP2009226234A (en) Sludge volume calculation method, and monitoring method and control method for aeration tank using the same
Lee et al. Assessing the water quality impacts of phosphorus in runoff from agricultural lands
Ou et al. Performance of a Constructed Wetland‐Pond System for Treatment and Reuse of Wastewater from Campus Buildings
Kobylinski et al. Starting up a 5-stage Bardenpho plant with in-line fermentation-one step at a time
JP2001219183A (en) Water quality control apparatus of sewerage equipment
CN101698549A (en) Integrated oxygen-poor intermittent aeration domestic sewage treatment device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20170426

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20170426

A975 Report on accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A971005

Effective date: 20170529

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20170606

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20170620

R150 Certificate of patent or registration of utility model

Ref document number: 6168545

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150