JP2582014B2 - Aerobic biological filter bed treatment method and apparatus - Google Patents

Aerobic biological filter bed treatment method and apparatus

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Publication number
JP2582014B2
JP2582014B2 JP5609892A JP5609892A JP2582014B2 JP 2582014 B2 JP2582014 B2 JP 2582014B2 JP 5609892 A JP5609892 A JP 5609892A JP 5609892 A JP5609892 A JP 5609892A JP 2582014 B2 JP2582014 B2 JP 2582014B2
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JP
Japan
Prior art keywords
water
filter bed
washing
tank
storage tank
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.)
Expired - Lifetime
Application number
JP5609892A
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Japanese (ja)
Other versions
JPH0623381A (en
Inventor
克之 片岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebara Corp
Ebara Research Co Ltd
Original Assignee
Ebara Corp
Ebara Research Co Ltd
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Priority to JP5609892A priority Critical patent/JP2582014B2/en
Publication of JPH0623381A publication Critical patent/JPH0623381A/en
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Publication of JP2582014B2 publication Critical patent/JP2582014B2/en
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Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Biological Treatment Of Waste Water (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、下水、各種産業排水な
どの有機性汚水や、河川、湖沼水および上・用水を生物
学的に浄化処理する技術に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for biologically purifying organic sewage such as sewage and various kinds of industrial wastewater, rivers, lakes and marshes, and tap water.

【０００２】[0002]

【従来の技術】現時点で、最も進歩した生物処理技術は
好気性生物濾床（Ｂｉｏｌｏｇｉｃａｌ Ａｅｒａｔｅ
ｄ Ｆｉｌｔｅｒ 略してＢＡＦという）による浄化処
理方法と言えよう。この方法は従来アンスラサイト、粒
状活性炭、各種セラミックなどの粒状濾材を充填した濾
床に空気泡を供給しながら原水を通過させ、粒状濾材に
固定化された微生物によって有機性汚濁物やＮＨ3 −Ｎ
などを除去し、かつＳＳを同時に濾過する技術である。2. Description of the Related Art At present, the most advanced biological treatment technology is the aerobic biological filter.
d Filter (abbreviated as BAF). In this method, raw water is passed while supplying air bubbles to a filter bed filled with granular filter media such as anthracite, granular activated carbon, and various ceramics, and organic pollutants and NH 3 − are fixed by microorganisms fixed to the granular filter media. N
This is a technique for simultaneously removing SS and filtering SS.

【０００３】上記ＢＡＦとは本来、微生物を粒状濾材に
固定化し、その濾材を濾床に充填して形成された濾床に
対する略称であるが、かかる好気性生物濾床が設置され
た処理槽および付帯設備をも含めてより広く粒状濾材に
固定化された微生物によって有機性汚濁物やＮＨ3 −Ｎ
などを除去し、かつＳＳを同時に濾過する技術に対する
総称としても使用される。従って、ここではＢＡＦは技
術の総称として使用し、そのなかで使用する好気性生物
濾床を略称する時は濾床という。[0003] The BAF is originally an abbreviation for a filter bed formed by immobilizing microorganisms on a granular filter medium and filling the filter medium into a filter bed. Organic contaminants and NH 3 -N
It is also used as a general term for the technology of removing SS and simultaneously filtering SS. Accordingly, BAF is used herein as a generic term for technology, and the aerobic biological filter bed used is referred to as filter bed when abbreviated.

【０００４】ＢＡＦは固液分離に関するトラブルが殆ど
なく、しかもエアレーション動力も少なくてすむという
特徴をもっているため最近注目を集めている技術であ
る。従来のＢＡＦの代表的な例は図２に示す様な構成で
ある。ＢＡＦは濾過機能を有する装置であるので運転を
続行すると必然的に処理槽１内の濾床２のＳＳ捕捉容量
が限界に達する。従ってこの時点で濾床２を洗浄して濾
床２を清浄な状態に回復させなくてはならない。そのた
め、従来は以下のような対策を採ってきた。[0004] BAF is a technology that has recently attracted attention because it has the characteristic that there is almost no trouble relating to solid-liquid separation and the aeration power is small. A typical example of the conventional BAF has a configuration as shown in FIG. Since BAF is a device having a filtering function, if the operation is continued, the SS trapping capacity of the filter bed 2 in the processing tank 1 necessarily reaches a limit. Therefore, at this point, the filter bed 2 must be washed to restore the filter bed 2 to a clean state. Therefore, conventionally, the following measures have been taken.

【０００５】すなわち、通常時は濾床２の処理水は、す
べて処理槽１とは別に設置した処理水貯留槽１５に流入
させて貯留し、系外へ放流する際にはこの処理水貯留槽
１５からオーバーフローさせている。濾床２の洗浄が必
要な時には原水の流入を止め、処理ポンプ８を駆動させ
て処理水貯留槽１５に貯留してある処理水を洗浄用水と
して処理槽１の下部に供給し、濾床２を処理水で逆洗す
るようにしている。That is, normally, all the treated water in the filter bed 2 flows into the treated water storage tank 15 installed separately from the treatment tank 1 and is stored therein. When the treated water is discharged out of the system, the treated water storage tank is used. It overflows from 15. When it is necessary to wash the filter bed 2, the flow of raw water is stopped, and the treatment pump 8 is driven to supply the treated water stored in the treated water storage tank 15 to the lower part of the treatment tank 1 as washing water, and Is washed back with treated water.

【０００６】従来のＢＡＦの洗浄は上記のような方法を
採用しているため次のような問題点があった。 ＢＡＦで処理した清澄な処理水を消費して、ＢＡＦ
の濾床を洗浄しなければならないという不合理な点があ
る。 処理槽内の水イコール放流水であるため処理水槽内
の水の水質は常に清澄なものでなければならず、そのた
め、ＢＡＦの濾床洗浄時には濾床を十分洗浄し、洗浄後
の処理水の水質を直ちに放流可能な清澄な水質にしなけ
ればならない。そのため濾床の洗浄時には多量の洗浄用
水を使用せざるを得なくなっている。The conventional BAF cleaning employs the above-described method, and thus has the following problems. Consuming clear treated water treated with BAF,
There is an unreasonable point that the filter bed must be washed. Since the water in the treatment tank is equal to the water discharged, the water quality in the treatment tank must always be clear. Therefore, when the BAF filter bed is washed, the filter bed is thoroughly washed, and the treated water after washing is washed. The water quality must be clear so that it can be released immediately. Therefore, a large amount of washing water must be used when washing the filter bed.

【０００７】 その結果、洗浄用水槽を大容量な水槽
にしなければならず、設置面積や建設コストが大きなも
のとなる。 洗浄用水を多量に用いるため、必然的に洗浄排水の
発生量も多量となり、その処分が難しくなる。As a result, the cleaning water tank must be a large-capacity water tank, and the installation area and the construction cost become large. Since a large amount of cleaning water is used, a large amount of cleaning wastewater is inevitably generated, and its disposal becomes difficult.

【０００８】[0008]

【発明が解決しようとする課題】本発明の課題は、従来
装置の前記〜の課題を解決し、好気性生物濾床式処
理方法の処理効率および処理装置設置の空間利用性など
を著しく改善することにある。The object of the present invention is to solve the above-mentioned problems of the conventional apparatus, and to remarkably improve the processing efficiency of the aerobic biological filter type processing method and the space utilization of the processing apparatus installation. It is in.

【０００９】[0009]

【課題を解決するための手段】上記課題は、発想を転換
し、好気性生物処理で生産した清澄な処理水を用いるこ
となく生物処理槽内の濾床を洗浄できる構成とした新概
念により、以下に示す処理方法と処理装置とを開発する
ことにより達成される。１） 処理槽内の好気性生物濾床により原水を浄化する生
物濾過処理方法において、該濾床に立体的網目構造を有
する粒状物を充填し、該濾床を洗浄した後に、原水の供
給を再開し、該濾床から最初に出る流出水を所定時間洗
浄用水貯留槽に溜め、次回の濾床の洗浄の際に、該貯留
槽の貯留水をその洗浄用水として用いると共に、前記所
定時間以後の流出水を処理水として導出することを特徴
とする好気性生物濾床式処理方法。Means for Solving the Problems The above-mentioned problem has been solved by a new concept in which the idea has been changed and the filter bed in the biological treatment tank can be washed without using clear treated water produced by aerobic biological treatment. This is achieved by developing a processing method and a processing apparatus described below. 1) In a biological filtration treatment method for purifying raw water using an aerobic biological filter bed in a treatment tank, a granular material having a three-dimensional network structure is filled in the filter bed, and after washing the filter bed, the raw water is supplied.
The feed was resumed, a predetermined time wash the effluent initially exiting from the filter bed
Store it in the purified water storage tank and store it at the next washing of the filter bed.
An aerobic biological filter bed treatment method, wherein the water stored in the tank is used as washing water, and the effluent after the predetermined time is led out as treated water.

【００１０】２）処理槽内に立体網目構造をもつ粒状物
を充填した好気性生物濾床を有し、該処理槽の該濾床に
原水を供給する手段と酸素含有ガス供給手段とを備えた
好気性生物処理槽において、該処理槽と別個に洗浄用水
貯留槽を配備し、該処理槽には洗浄後に通水を開始した
時に該濾床から最初に出る流出水を所定時間該貯留槽へ
導き貯留する手段とその後の流出水を処理水として該洗
浄用水貯留槽を経ず系外に導出する手段および濾床洗浄
排水の排出手段を備え、洗浄時に該洗浄用水貯留槽から
は貯留水を該処理槽の該濾床へ導く手段を備えたことを
特徴とする好気性生物濾床式処理装置。 2) An aerobic biological filter bed filled with granular material having a three-dimensional network structure is provided in a treatment tank, and a means for supplying raw water to the filter bed of the treatment tank and an oxygen-containing gas supply means are provided. In the aerobic biological treatment tank, a washing water storage tank was provided separately from the treatment tank, and water was started to pass through the treatment tank after washing.
Sometimes the first effluent flowing out of the filter bed is transferred to the storage tank for a predetermined time.
Guided storage means and the subsequent runoff as treated water
Means leading out of the system without passing through the purification water storage tank and filter bed cleaning
An aerobic biological filter bed processing apparatus, comprising : means for discharging waste water; and means for guiding stored water from the washing water storage tank to the filter bed of the processing tank during washing.

【００１１】ここで、原水とは好気性生物濾床を有する
生物処理槽に浄化処理を行うために供給される下水、各
種産業排水などの有機性汚水や、河川、湖沼水、上水お
よび用水を意味する。また、生物濾過とは生物濾床に原
水を通水して浄化処理する時生物学的処理による有機性
汚物の除去と同時に原水に含まれるＳＳが濾床の濾過作
用により除去される処理方法を意味する。Here, raw water refers to organic wastewater such as sewage and various industrial effluents supplied for purifying biological treatment tanks having an aerobic biological filter bed, rivers, lakes and marshes water, clean water, and water. Means In addition, biological filtration is a treatment method in which raw water is passed through a biological filter bed for purification treatment, and at the same time, SS contained in raw water is removed by the filtration action of the filter bed at the same time as removal of organic waste by biological treatment. means.

【００１２】本発明の骨子は、処理槽と別個に洗浄用水
を貯留する貯留槽を設け、該貯留槽の貯留水を洗浄用水
として処理槽内の濾床を洗浄した後、原水を該濾床で処
理しながらその処理水と共に所定時間貯留槽に導き貯留
し、次回の濾床洗浄時に同様に貯留槽から貯留していた
洗浄用水を用いて濾床を洗浄できるようにすることで濾
床の洗浄を処理水（充分清澄となったもの）を使用せず
に行うことを可能にしたことにある。The gist of the present invention is to provide a storage tank for storing cleaning water separately from the treatment tank, and to wash the filter bed in the processing tank using the water stored in the storage tank as the cleaning water, and then remove the raw water from the filter bed. The treatment bed is guided for a predetermined time together with the treated water and stored in the storage tank, and the filter bed can be washed using the washing water stored in the storage tank in the next washing of the filter bed at the next time. The object of the present invention is to enable washing to be performed without using treated water (which is sufficiently clear).

【００１３】以下に図１を用いて本発明の好気性生物濾
床式処理装置の構成について説明する。但し、図１は本
発明の装置の１具体例を示したものであり、本発明の実
施態様はこれによって制限されるものではない。本発明
のＢＡＦは処理槽１と洗浄用水貯留槽１３とこれらを連
結する配管、弁とポンプなどで構成される。すなわち、
処理槽１は原水供給管５、好気性生物濾床２、空気供給
手段３と処理水流出管４などを有し、また処理水流出管
４からは、分岐用弁１１を備えた洗浄用水移送管６が分
岐され、この洗浄用水移送管６により洗浄用水貯留槽１
３と連結されている。ここで、空気供給手段３とした
が、より一般的には酸素含有ガス供給手段である。以下
本発明の具体的態様の説明では酸素含有ガスの一例は空
気とする。The configuration of the aerobic biological filter type treatment apparatus of the present invention will be described below with reference to FIG. However, FIG. 1 shows one specific example of the device of the present invention, and the embodiment of the present invention is not limited thereto. The BAF of the present invention is composed of the treatment tank 1, the cleaning water storage tank 13, and the pipes, valves, pumps and the like connecting these. That is,
The treatment tank 1 has a raw water supply pipe 5, an aerobic filter bed 2, an air supply means 3, a treated water outlet pipe 4, and the like. The pipe 6 is branched, and the cleaning water transfer pipe 6 is used for the cleaning water storage tank 1.
3 is connected. Here, the air supply means 3 is used, but more generally, an oxygen-containing gas supply means. Hereinafter, in the description of the specific embodiment of the present invention, an example of the oxygen-containing gas is air.

【００１４】洗浄用水貯留槽１３はまた、途中に洗浄ポ
ンプ８と洗浄用水弁１２を備えた洗浄用水供給管７によ
り処理槽１と連結され、貯留槽１３に貯留されていた洗
浄用水を処理槽１に供給し槽内の好気性生物濾床２を洗
浄できる。好気性生物濾床２を洗浄した排水は処理槽１
に設けられた洗浄排水放出管１０から系外に放出され
る。The cleaning water storage tank 13 is connected to the processing tank 1 by a cleaning water supply pipe 7 provided with a cleaning pump 8 and a cleaning water valve 12 on the way, and the cleaning water stored in the storage tank 13 is processed by the processing tank. 1 to wash the aerobic biological filter bed 2 in the tank. The waste water after washing the aerobic filter bed 2 is treated in the treatment tank 1
Is discharged out of the system from a cleaning drainage discharge pipe 10 provided in the system.

【００１５】上記本発明のＢＡＦの構成を従来のＢＡＦ
の構成と比較すると、以下の様な相違点が見出される。 （１）本発明のＢＡＦでは別途洗浄用水貯留槽が設置さ
れている。これは従来の処理水貯留槽と異なり、処理水
が全量通過する槽ではない。 （２）本発明では、処理水流出管を通って系外に流出さ
れる処理水の水質と処理水流出管から分岐した洗浄用水
移送管を通って洗浄用水貯留槽に流入する洗浄用水の水
質とは同じでなく、洗浄用水移送管を通る洗浄用水のＳ
Ｓは処理水のＳＳより高い値を示すものであってもよ
い。The configuration of the BAF according to the present invention is replaced with a conventional BAF.
The following differences are found in comparison with the configuration of (1) In the BAF of the present invention, a washing water storage tank is separately provided. This is different from the conventional treated water storage tank, and is not a tank through which the entire amount of treated water passes. (2) In the present invention, the quality of the treated water flowing out of the system through the treated water outflow pipe and the quality of the cleaning water flowing into the cleaning water storage tank through the cleaning water transfer pipe branched from the treated water outflow pipe. Is not the same as
S may indicate a higher value than SS of the treated water.

【００１６】[0016]

【作用】本発明のＢＡＦは上記したように従来のＢＡＦ
と異なった構成を有するので、以下に示すような本発明
に独自的な作用を生む。以下に本発明のＢＡＦの作用を
図１を用いて説明する。下水などの処理対象の原水は、
原水供給管５により濾床２に流入し、空気供給手段３か
らの上昇空気泡と向流接触しながら濾床２内を通過し、
ここで生物濾過処理が行われ、処理された処理水は非常
に清澄な処理水として処理水流出管４を通って系外に移
送される。The BAF of the present invention is, as described above, a conventional BAF.
Since the present invention has a configuration different from that of the first embodiment, unique effects are produced in the present invention as described below. Hereinafter, the operation of the BAF of the present invention will be described with reference to FIG. Raw water to be treated, such as sewage,
The water flows into the filter bed 2 through the raw water supply pipe 5, passes through the filter bed 2 while being in countercurrent contact with the rising air bubbles from the air supply means 3,
Here, biological filtration processing is performed, and the treated water that has been treated is transferred to the outside of the system through the treated water outflow pipe 4 as very clear treated water.

【００１７】上記のように濾床２内での生物濾過処理を
続けると、濾床２のＳＳ捕捉容量が限界に達し、処理水
の水質が悪化しはじめるので、その時点で原水供給管５
に配備した原水弁１４を閉じて原水の供給を停止し、以
下に示す方法で濾床２を洗浄する。すなわち、まず処理
水流出弁９を閉じ、洗浄用水供給管７の洗浄用水弁１２
を開き、前回の洗浄時に、洗浄用水貯留槽１３に貯留し
ておいた洗浄用水を洗浄ポンプ８により洗浄用水供給管
７を通して処理槽１に供給し処理槽１内の濾床２を逆洗
する。この時空気供給手段３からの空気供給量を適切に
調整し、空気・水混合流による洗浄を行うことが好まし
い。濾材内に捕捉されていたＳＳは洗浄用水と共に洗浄
排水放出管１０から系外に放出される。If the biological filtration treatment in the filter bed 2 is continued as described above, the SS trapping capacity of the filter bed 2 reaches the limit and the quality of the treated water starts to deteriorate.
The supply of raw water is stopped by closing the raw water valve 14 disposed in the filter bed, and the filter bed 2 is washed by the following method. That is, first, the treated water outflow valve 9 is closed, and the cleaning water valve 12 of the cleaning water supply pipe 7 is closed.
And the washing water stored in the washing water storage tank 13 during the previous washing is supplied to the treatment tank 1 through the washing water supply pipe 7 by the washing pump 8, and the filter bed 2 in the treatment tank 1 is backwashed. . At this time, it is preferable to appropriately adjust the amount of air supplied from the air supply means 3 and perform cleaning with a mixed flow of air and water. The SS trapped in the filter medium is discharged from the cleaning drainage pipe 10 together with the cleaning water to the outside of the system.

【００１８】洗浄用水の使用量は濾床２の濾床容量の
１．５倍程度で十分であり、洗浄用水貯留槽１３の容量
の水位が所定の水位にまで低下した時点で、洗浄ポンプ
８を止め洗浄用水弁１２を閉じ、空気供給手段３からの
空気洗浄用の空気の供給も停止する。The amount of the washing water used is about 1.5 times the capacity of the filter bed of the filter bed 2 and is sufficient. When the water level of the capacity of the washing water storage tank 13 falls to a predetermined level, the washing pump 8 is used. Is stopped, the cleaning water valve 12 is closed, and the supply of air for air cleaning from the air supply means 3 is also stopped.

【００１９】ここで重要な点は、濾床２内のＳＳを完全
に系外に追い出す必要がなく、洗浄終了時に濾床２内に
ＳＳが残留していても構わないという点である。そして
この点が本発明の独自の概念である。An important point here is that there is no need to completely drive out SS in the filter bed 2 to the outside of the system, and SS may remain in the filter bed 2 at the end of washing. This is a unique concept of the present invention.

【００２０】この状態で原水供給管５に配備した原水弁
１４を開いて原水の供給を再開し、空気供給手段３から
生物処理のための空気の供給も再開する。当初は処理水
流出管４からＳＳ濃度の高い水が流出してくる。このＳ
Ｓは洗浄終了時に濾床２内に残留していたＳＳである。
すなわち、洗浄終了時には濾床２内にはＳＳ含量の多い
洗浄用水が残留しているために、それ以降約２時間の間
は濾床２から流出する処理水のＳＳ含量は比較的多い。
従ってその間の流出水は分岐弁１１を開いて処理水流出
管４から分岐した洗浄用水移送管６を通して洗浄用水貯
留槽１３に移送し、貯留する。In this state, the raw water valve 14 provided in the raw water supply pipe 5 is opened to restart the supply of the raw water, and the supply of air for biological treatment from the air supply means 3 is also restarted. Initially, water with a high SS concentration flows out of the treated water outflow pipe 4. This S
S is SS remaining in the filter bed 2 at the end of the washing.
That is, at the end of washing, since the washing water having a high SS content remains in the filter bed 2, the SS content of the treated water flowing out from the filter bed 2 is relatively large for about 2 hours thereafter.
Therefore, the effluent during this time is transferred to the washing water storage tank 13 through the washing water transfer pipe 6 branched from the treated water outflow pipe 4 by opening the branch valve 11 and stored therein.

【００２１】上記したように洗浄終了後原水の供給を再
開して約２時間ほどすると、原水を濾床２によって処理
して処理水の水質となった水が濾床２内に残留していた
ＳＳ分を追い出し、残留ＳＳ分を追い出した後、濾床２
から流出する水はＳＳ濃度の低い清澄なものとなる。こ
の時点で洗浄用水移送管６の分岐弁１１を閉じ、処理水
として系外に放出する。As described above, when the supply of raw water was resumed for about 2 hours after the completion of the washing, the raw water was treated by the filter bed 2, and water having the quality of the treated water remained in the filter bed 2. After removing the SS content and the remaining SS content, the filter bed 2
The water flowing out of the system becomes clear with a low SS concentration. At this time, the branch valve 11 of the cleaning water transfer pipe 6 is closed to discharge the treated water out of the system.

【００２２】濾床２内に充填する濾材の種類としては、
従来と同様アンスラサイトなどの粒状鉱物を用いても生
物学的処理を行うことはきるが、以下に記載する理由か
ら、好ましい濾材としてポリウレタンフォームなどで作
成した立体的網目構造を有する多孔性粒状物を使用する
のが本発明の特徴の一つである。また、かかる濾材は生
物学的処理に使用する微生物を濾材の表面のみならず内
部にまで多量に保持でき、かつ軽量であるので、種々の
点で有利である。The type of the filter medium to be filled in the filter bed 2 is as follows.
Biological treatment can be performed using a granular mineral such as anthracite as in the past, but for the reasons described below, a porous granular material having a three-dimensional network structure made of polyurethane foam or the like as a preferred filter medium. Is one of the features of the present invention. Further, such a filter medium is advantageous in various points because it can hold a large amount of microorganisms used for biological treatment not only on the surface of the filter medium but also inside the filter medium and is lightweight.

【００２３】すなわち、従来のＢＡＦにおいてアンスラ
サイトなどの粒状鉱物からなる濾材を使用する際には、
その支持床として４０〜５０ｃｍの厚さの砂利層を必要
とした。かかる砂利層が濾材充填層と共に存在する場合
には、上記した本発明の充填層洗浄法を適用したとする
と、洗浄終了時に濾床内に存在するＳＳ含量の多い残留
洗浄用水を約２時間の間で濾材層から流出させ、清澄な
処理水を得ることは困難である。なぜなら、砂利層にＳ
Ｓが捕捉され、支持床の汚染がおき易いからである。本
発明の場合には、濾材が軽量で、その濾材からなる濾床
を支持するのに簡単な網のような多孔性部材で充分であ
り、かかる簡単な網のような多孔性部材で支持された濾
床であってこそ本発明の濾床洗浄法を有効に適用するこ
とができる。これが本発明の特徴の一つである。That is, when a filter medium made of a granular mineral such as anthracite is used in a conventional BAF,
The supporting floor required a gravel layer of 40 to 50 cm in thickness. When such a gravel layer is present together with the filter medium packed bed, assuming that the packed bed washing method of the present invention described above is applied, at the end of washing, residual SS-rich washing water present in the filter bed for about 2 hours. It is difficult to flow out from the filter medium layer to obtain clear treated water. Because the gravel layer is S
This is because S is captured and contamination of the support floor is likely to occur. In the case of the present invention, the filter medium is lightweight, and a porous member such as a simple net is sufficient to support the filter bed made of the filter medium, and the filter medium is supported by the porous member such as the simple net. The filter bed washing method of the present invention can be applied effectively only with a filter bed. This is one of the features of the present invention.

【００２４】また、ポリウレタンフォームなどで作成し
た立体的網目構造を有する粒状物濾材は表面のみならず
その内部にも微生物を保持できるので、表面のみにしか
微生物を保持できないアンスラサイトなどの粒状鉱物か
らなる濾材に比較し系内の微生物濃度を５〜７倍も高め
ることができ、処理反応速度を著しく大きくできるとい
うメリットもある。Further, since a particulate filter medium having a three-dimensional network structure made of polyurethane foam or the like can retain microorganisms not only on the surface but also inside thereof, it can be used to remove particulate minerals such as anthracite that can retain microorganisms only on the surface only. There is also an advantage that the concentration of microorganisms in the system can be increased by 5 to 7 times as compared with the filter medium, and the treatment reaction speed can be significantly increased.

【００２５】[0025]

【実施例】以下、本発明の１具体例である図１に示した
処理装置を用いて行った濾床洗浄に伴うＳＳ流出の状況
を図３のグラフで示す。 （実施例１）図３において、時間ｔ0 までの間に濾床２
から流出する水は放流可能なＳＳ濃度値Ｃ0 より大きい
ＳＳ濃度値を示すので、洗浄用水弁１１を開いて洗浄用
水貯留槽１３に移送し貯留する。洗浄用水貯留槽１３が
満水になった時点ｔ1 で洗浄用水弁１１を閉じ、処理水
の放流を開始する。FIG. 3 is a graph showing the state of SS effluent accompanying filter bed washing performed using the processing apparatus shown in FIG. 1 which is one embodiment of the present invention. (Example 1) FIG. 3, the filter bed until the time t 0 2
Since the water flowing out of the tank has an SS concentration value larger than the releasable SS concentration value C 0 , the cleaning water valve 11 is opened, and the water is transferred to the cleaning water storage tank 13 and stored therein. Washing water valve 11 to close the washing water storage tank 13 at time t 1 it becomes full water, starts the discharge of the treated water.

【００２６】本実施態様では、ｔ1 とｔ0 との関係は常
にｔ1 ＞ｔ0 となりｔ1 ＜ｔ0 となる状況は発生しな
い。つまり濾床２からの流出水のＳＳ濃度値が放流基準
Ｃ0 以下に低下しないうちに洗浄用水貯留槽１３が満水
になってしまうという状況が発生しないように設計され
る。洗浄用水貯留槽１３は、放流可能な水質の処理水が
得られるまでに流出する洗浄用水を貯留するに適性なサ
イズとしておけばよく、最小限の施設容量で済む。In the present embodiment, the relationship between t 1 and t 0 is always t 1 > t 0 , and the situation where t 1 <t 0 does not occur. That SS density value of effluent water from the filter bed 2 is situation cleaning water storage tank 13 before it falls below effluent standard C 0 becomes full level is designed so as not to generate. The cleaning water storage tank 13 may have a size suitable for storing the cleaning water flowing out before the treatment water having a water quality that can be discharged is obtained, and requires only a minimum facility capacity.

【００２７】（比較例１）従来法の濾床洗浄法に伴うＳ
Ｓ流出の状況を図３を用いて説明する。従来法では、濾
床の洗浄後の流出水のＳＳが直ちに放流基準ＳＳ値Ｃ0
以下になっているように洗浄する仕方で行われてきたた
め、洗浄後の処理槽内にある水が放流基準ＳＳ値Ｃ0 以
下になるよう洗浄するために清澄なＢＡＦ処理水を多量
に消費しなければならなくなっていたのである。（実績
値では、濾床容量の３倍の処理水を必要とした）これに
対して本発明の洗浄方法では発想を転換させ、ＢＡＦを
洗浄するのに、せっかく生産した清澄なＢＡＦ処理水を
使用しないように独自の洗浄方法を案出した点に特徴が
ある。(Comparative Example 1) S accompanying the conventional filter bed washing method
The situation of S outflow will be described with reference to FIG. In the conventional method, the SS of the effluent water after washing the filter bed is immediately changed to the discharge reference SS value C 0.
Since cleaning has been performed as described below, a large amount of clear BAF treated water is consumed in order to clean the water in the treatment tank after cleaning to be equal to or lower than the discharge reference SS value C 0. It had to be done. In contrast, the cleaning method of the present invention changed the idea and used the clean BAF treated water that had been produced to clean the BAF. The feature is that a unique cleaning method was devised so as not to use it.

【００２８】[0028]

【発明の効果】上記したような本発明の構成と作用によ
り以下のような効果を生み出すことができる。 清澄な処理水を濾床の洗浄用として消費する必要がな
いので、処理水生産効率が高い。 洗浄時に、濾床内に捕捉されていたＳＳを完全に系外
に排出する必要がないので、洗浄用水の使用量が少量で
すむ。 洗浄用水の貯留タンクの大きさと設置スペースが削減
でき、洗浄排水の発生量も少なくなるので、その処分も
容易になる。（一連の実施では洗浄用に使用した処理水
量および洗浄排水発生量は図２の従来システムの場合の
二分の一に削減できることが確かめられた。）The following effects can be produced by the configuration and operation of the present invention as described above. Since there is no need to consume clear treated water for washing the filter bed, the treated water production efficiency is high. At the time of washing, it is not necessary to completely discharge the SS trapped in the filter bed out of the system, so that a small amount of washing water is used. The size and installation space of the washing water storage tank can be reduced, and the amount of washing wastewater generated is also reduced, thereby facilitating disposal. (In a series of implementations, it was confirmed that the amount of treated water used for washing and the amount of washing wastewater generated can be reduced to half that of the conventional system of FIG. 2).

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の好気性生物濾床式処理方法の一例を説
明するためのフロー図である。FIG. 1 is a flow chart for explaining an example of an aerobic biological filter type treatment method of the present invention.

【図２】従来の好気性生物濾床式処理方法の一例を説明
するためのフロー図である。FIG. 2 is a flowchart for explaining an example of a conventional aerobic biological filter type treatment method.

【図３】本発明における濾床洗浄後の流出水のＳＳ含量
の時間経過を示すグラフである。FIG. 3 is a graph showing the time course of the SS content of effluent water after washing the filter bed in the present invention.

【符号の説明】[Explanation of symbols]

１ 処理槽 １０ 洗浄排水放出管 ２ 濾床 １１ 分岐弁 ３ 空気供給手段 １２ 洗浄用水弁 ４ 処理水流出管 １３ 洗浄用水貯留槽 ５ 原水供給管 １４ 原水弁 ６ 洗浄用水移送管 １５ 処理水貯留槽 ７ 洗浄用水供給管 Ｃ0 放流可能ＳＳ濃度 ８ 洗浄ポンプ ｔ0 放流可能時間 ９ 処理水流出弁 ｔ1 洗浄排水貯留槽満
水時間REFERENCE SIGNS LIST 1 treatment tank 10 washing drainage pipe 2 filter bed 11 branch valve 3 air supply means 12 washing water valve 4 treated water outlet pipe 13 washing water storage tank 5 raw water supply pipe 14 raw water valve 6 washing water transfer pipe 15 treated water storage tank 7 washing water supply pipe C 0 effluent can SS concentration of 8 wash pump t 0 discharged uptime 9 the treated water outlet valve t 1 detergent drain reservoir full level time

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 処理槽内の好気性生物濾床により原水を
浄化する生物濾過処理方法において、該濾床に立体的網
目構造を有する粒状物を充填し、該濾床を洗浄した後
に、原水の供給を再開し、該濾床から最初に出る流出水
を所定時間洗浄用水貯留槽に溜め、次回の濾床の洗浄の
際に、該貯留槽の貯留水をその洗浄用水として用いると
共に、前記所定時間以後の流出水を処理水として導出す
ることを特徴とする好気性生物濾床式処理方法。1. A biological filtration treatment method for purifying raw water by aerobic biological filter bed in the processing tank, filled with granules having a three-dimensional network structure filtrate floor, after washing the filtrate bed, raw water and the supply of resumption, effluent water first to come out from the filter bed
In the washing water storage tank for a predetermined time, and
At this time, an aerobic biological filter bed treatment method characterized by using the water stored in the storage tank as the washing water and extracting the effluent after the predetermined time as treated water. 【請求項２】 処理槽内に立体網目構造をもつ粒状物を
充填した好気性生物濾床を有し、該処理槽の該濾床に原
水を供給する手段と酸素含有ガス供給手段とを備えた好
気性生物処理槽において、該処理槽と別個に洗浄用水貯
留槽を配備し、該処理槽には洗浄後に通水を開始した時
に該濾床から最初に出る流出水を所定時間該貯留槽へ導
き貯留する手段とその後の流出水を処理水として該洗浄
用水貯留槽を経ず系外に導出する手段および濾床洗浄排
水の排出手段を備え、洗浄時に該洗浄用水貯留槽からは
貯留水を該処理槽の該濾床へ導く手段を備えたことを特
徴とする好気性生物濾床式処理装置。2. A treatment tank having an aerobic biological filter bed filled with granular material having a three-dimensional network structure, comprising means for supplying raw water to the filter bed of the treatment tank and means for supplying oxygen-containing gas. In the aerobic biological treatment tank, a washing water storage tank is provided separately from the treatment tank, and when water is started to flow through the treatment tank after washing.
The effluent first flowing out of the filter bed is introduced into the storage tank for a predetermined time.
Means for storing and washing the effluent after that as treated water
Means and the filter bed washed waste deriving out system without passing through the water reservoir
An aerobic biological filter bed processing apparatus, comprising : means for discharging water; and means for guiding stored water from the washing water storage tank to the filter bed of the processing tank during washing.
JP5609892A 1992-02-07 1992-02-07 Aerobic biological filter bed treatment method and apparatus Expired - Lifetime JP2582014B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5609892A JP2582014B2 (en) 1992-02-07 1992-02-07 Aerobic biological filter bed treatment method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5609892A JP2582014B2 (en) 1992-02-07 1992-02-07 Aerobic biological filter bed treatment method and apparatus

Publications (2)

Publication Number Publication Date
JPH0623381A JPH0623381A (en) 1994-02-01
JP2582014B2 true JP2582014B2 (en) 1997-02-19

Family

ID=13017639

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP2582014B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104176820A (en) * 2014-09-10 2014-12-03 徐东海 Noise-reduction aeration biological filter tank

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5551639B2 (en) * 1972-10-23 1980-12-25
JPS58146492A (en) * 1982-02-23 1983-09-01 Kankyo Kagaku Center:Kk Biological treatment of waste water using organism fixed bed
JPH0223664A (en) * 1988-07-12 1990-01-25 Seiko Epson Corp Manufacture of semiconductor device

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