JP3149465B2 - Automatic backwash control method for biological activated carbon treatment tower - Google Patents
Automatic backwash control method for biological activated carbon treatment towerInfo
- Publication number
- JP3149465B2 JP3149465B2 JP18427891A JP18427891A JP3149465B2 JP 3149465 B2 JP3149465 B2 JP 3149465B2 JP 18427891 A JP18427891 A JP 18427891A JP 18427891 A JP18427891 A JP 18427891A JP 3149465 B2 JP3149465 B2 JP 3149465B2
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- water
- backwashing
- carbon treatment
- backwash
- 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 - Fee Related
Links
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
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Water Treatment By Sorption (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は浄水処理装置における生
物活性炭処理塔の逆洗自動制御方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically controlling backwashing of a biological activated carbon treatment tower in a water purification treatment apparatus.
【０００２】[0002]
【従来の技術】図２は、現在、一般的に行われている浄
水プロセスを示すものである。図２において、１は着水
井、２は混和池、３は撹拌器、４はフロック形成池、５
は撹拌器、６は沈澱池、７はろ過池である。８は浄水処
理システムで、オゾン接触塔９と活性炭処理塔１０によ
って構成される。2. Description of the Related Art FIG. 2 shows a water purification process which is currently generally performed. In FIG. 2, 1 is a landing well, 2 is a mixing pond, 3 is a stirrer, 4 is a floc formation pond, 5
Is a stirrer, 6 is a sedimentation basin, and 7 is a filtration pond. Reference numeral 8 denotes a water purification treatment system, which includes an ozone contact tower 9 and an activated carbon treatment tower 10.
【０００３】図２の浄水プロセスにおいて、河川・湖沼
から取水した原水が着水井１に入る。つぎに、原水中の
濁質成分（粘度、有機物等）を除去する目的で凝集剤を
注入し混合する混和池２をへてフロック形成池４に入
る。フロック形成池４では、ある時間滞留させ、かつ、
緩やかな撹はんを行うことによりより大きなフロックを
成長させる。その後、フロック形成池で成長したフロッ
クは沈澱池６で分離され、さらに、沈澱６で分離できな
い微フロックをろ過池７で除去する。この浄水工程に於
いて、殺藻処理、除鉄、除マンガン、色度除去を目的と
した塩素を注入する処理が行われる。In the water purification process shown in FIG. 2, raw water taken from a river / lake enters the landing well 1. Next, in order to remove the turbid components (viscosity, organic matter, etc.) in the raw water, the flocculant enters the flocculation pond 4 through the mixing pond 2 in which the coagulant is injected and mixed. In the floc formation pond 4, it is kept for a certain time, and
Grow larger flocks by gentle stirring. Thereafter, the flocs grown in the floc forming pond are separated in the sedimentation basin 6, and fine flocs that cannot be separated in the sedimentation basin 6 are removed in the filtration pond 7. In this water purification process, a process of injecting chlorine for the purpose of algicidal treatment, iron removal, manganese removal, and chromaticity removal is performed.
【０００４】近年、都市部での水環境の悪化により河
川、湖沼の水質汚濁が進んできており、従来の凝集沈
澱、ろ過処理、および塩素処理との組み合わせだけでは
水道用原水中の色度、臭気の除去には限界があり、ま
た、原水の水質悪化にともなう塩素注入量の増加により
生成される有機塩素化合物で発ガン性物質であるトリハ
ロメタンが増加する懸念が生じている。さらに、微量有
害物質の混入も問題となっている。このような背景から
「安全でおいしい水」を求める動きが強くなってきた。
そこで、これらの効果的な除去或は低減方法として、オ
ゾン処理、活性炭処理等とを複合した高度処理を浄水プ
ロセスに組み込む方式が実施されるようになってきた。
活性炭処理は、活性炭により被処理水中の微量有機物質
を吸着除去するものであり、浄水プロセスによっては活
性炭の表面に微生物を繁殖させ水中のアンモニアを除去
することも可能である（生物活性炭処理と呼ぶ）。活性
炭処理方式の種類は、固定槽式と流動槽式とがあり、活
性炭を固定槽状態か、流動状態で使用するかにより区別
され、各々、被処理水は活性炭処理塔を下向流および上
向流で移動する。固定槽式および流動槽式とは各々長所
・短所がある。下向流（固定槽）式活性炭処理は、流動
槽式に比べて運転操作が簡単で活性炭粒子の流出が少な
い点が長所であるが、浮遊懸濁物質の堆積による損失水
頭を取り除くために、定期的に活性炭槽の洗浄を行う必
要がある。[0004] In recent years, water pollution in rivers and lakes has been progressing due to the deterioration of the water environment in urban areas, and the chromaticity of raw water for tap water has been reduced by a combination of conventional coagulation sedimentation, filtration, and chlorination. There is a limit in removing odors, and there is a concern that trihalomethane, which is a carcinogenic substance, may increase in organochlorine compounds generated by an increase in the amount of chlorine injected due to deterioration of the quality of raw water. Furthermore, contamination of trace harmful substances has become a problem. Against this background, there has been an increasing demand for safe and delicious water.
Therefore, as a method for effectively removing or reducing these, a method of incorporating advanced treatment combining ozone treatment, activated carbon treatment, and the like into a water purification process has come into practice.
Activated carbon treatment is to remove trace organic substances in the water to be treated by activated carbon by adsorption. Depending on the water purification process, it is also possible to propagate microorganisms on the surface of activated carbon and remove ammonia in the water (referred to as biological activated carbon treatment). ). There are two types of activated carbon treatment methods: fixed tank type and fluidized tank type.The type of activated carbon is distinguished depending on whether the activated carbon is used in a fixed tank state or in a fluidized state. Moving in countercurrent. Each of the fixed tank type and the fluidized tank type has advantages and disadvantages. The downflow (fixed tank) type activated carbon treatment has the advantage of easier operation and less outflow of activated carbon particles than the fluidized tank type. However, in order to remove the head loss due to the accumulation of suspended suspended solids, It is necessary to periodically clean the activated carbon tank.
【０００５】[0005]
【発明が解決しようとする課題】下向流式生物活性炭処
理塔において、通水を継続して行うと活性炭槽に蓄積す
る懸濁物質あるいは活性炭槽内に繁殖する微生物の影響
により通水抵抗が増加し水頭（活性炭上端部の水位）が
上昇する。このため、定期的に活性炭槽を洗浄し、通水
の抵抗となる懸濁物質等を除去しなければならない。洗
浄の方式としては、水逆洗洗浄、空気洗浄等がある。水
逆洗洗浄は、被処理水の通水を止めて、処理塔の下部か
ら、活性炭処理水を逆洗用水として使用し活性炭槽の槽
膨張率を通常３０〜４０％程度になるように流量調節し
一定時間逆洗操作を継続するものであり、逆洗排水は処
理塔上部よりオーバーフローにより流出し浄水場原水へ
返送する。また、空気洗浄は、水逆洗洗浄と同様に被処
理水の通水を止めて、処理塔の下部から空気を送り活性
炭槽全体を激しく混合するため活性炭粒子相互間に与え
るせん断力が大きく水逆洗洗浄だけでは不十分な場合に
は有効であり洗浄効果が大きいが、活性炭粒子の摩耗や
生物活性炭処理を行っている場合には微生物の剥離する
問題がある。通常、空気洗浄は、単独には実施せず水逆
洗洗浄の補助として使用する。したがって、下向流式生
物活性炭処理塔を効率よく運転するためには、逆洗洗浄
の組合せ方法、および、逆洗をいかに適切に行うかが重
要であり、逆洗洗浄の自動化の必要性が生ずる。SUMMARY OF THE INVENTION In a downflow type biological activated carbon treatment tower, if water is continuously supplied, water flow resistance is affected by suspended substances accumulated in the activated carbon tank or microorganisms propagated in the activated carbon tank. The water head (water level at the top of the activated carbon) rises. For this reason, the activated carbon tank must be periodically cleaned to remove suspended substances and the like that cause water flow resistance. Washing methods include backwashing with water and air washing. In the water backwashing, the flow of the water to be treated is stopped, and from the lower part of the treatment tower, the activated carbon treated water is used as backwashing water so that the expansion rate of the activated carbon tank is usually about 30 to 40%. The backwash operation is to be continued for a certain period of time after adjustment, and the backwash wastewater flows out of the upper part of the treatment tower by overflow and is returned to the raw water of the water treatment plant. In the air cleaning, as in the case of backwashing, the flow of the water to be treated is stopped, air is sent from the lower part of the processing tower, and the entire activated carbon tank is vigorously mixed. Although backwashing alone is effective when the cleaning is not sufficient, the cleaning effect is great, but there is a problem that the activated carbon particles are worn away and the microorganisms are peeled off when biological activated carbon treatment is performed. Normally, air cleaning is not performed independently but is used as an aid to backwashing with water. Therefore, in order to operate the downflow type biological activated carbon treatment tower efficiently, it is important to combine backwashing and how to properly perform backwashing, and it is necessary to automate backwashing. Occurs.
【０００６】本発明は上述の問題点に鑑みてなされたも
ので、その目的は、水逆洗洗浄と空気逆洗洗浄を効率的
に組合せ制御することにより高性能な洗浄作用を得るこ
とである。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to obtain a high-performance cleaning action by efficiently controlling the combination of water backwashing and air backwashing. .
【０００７】[0007]
【課題を解決するための手段】本発明は、上記目的を達
成するために、活性炭処理塔に処理すべき原水を通流さ
せた後に処理槽に導びき、前記原水を処理するものにお
いて、前記生物活性炭処理塔内の逆洗終了時水位レベ
ル、逆洗開始水位レベル、および空気洗浄開始レベルを
予め設定する工程と、前記生物活性炭処理塔の水頭が前
記設定された逆洗開始レベルに達したときに前記生物活
性炭処理塔への前記原水の通水を停止すると共に逆洗を
開始する工程と、その後、前記生物活性炭処理塔の水頭
が前記設定された空気洗浄開始レベルに達したときに逆
洗を停止して所定時間の空気洗浄を開始する工程と、前
記空気洗浄終了後に再び所定時間の逆洗を開始して逆洗
排水を前記生物活性炭処理塔からオーバーフローさせる
工程と、前記逆洗の所定時間経過後に前記処理槽へ処理
水を導き、前記生物活性炭処理塔の水頭が前記設定され
た逆洗終了時水位レベルに達したときに前記原水の通水
を再開する工程とからなることを特徴とする。The present invention SUMMARY OF], in order to achieve the above object, conductive sawn to the processing tank after flowing through the raw water to be processed activated carbon treatment column, in which process the raw water, the Water level at the end of backwash in biological activated carbon treatment tower
Level, backwash start water level, and air wash start level.
The step of setting in advance and the head of the biological activated carbon treatment tower is
When the set backwash start level is reached, the biological activity
Stop the flow of the raw water to the charcoal treatment tower and backwash
Starting and then the head of the biological activated carbon treatment tower
Is reversed when the set air cleaning start level is reached.
Stopping the washing and starting air cleaning for a predetermined time;
After the air cleaning is completed, start backwashing for a predetermined time again and backwash
Wastewater overflows from the biological activated carbon treatment tower
Process and after the predetermined time of the backwash has passed, the treatment is performed in the treatment tank.
Guide the water, the head of the biological activated carbon treatment tower is set as above
When the water level reaches the end of the backwash,
And restarting the process .
【０００８】[0008]
【作用】下向流式生物活性炭処理塔の逆洗自動制御をコ
ントローラーにより行い、そのシステム構成はレベル計
（逆洗開始水位レベル、空気洗浄開始水位レベル、逆洗
終了時水位レベル）と水逆洗配管系（逆洗用電動弁、逆
洗用流量計、逆洗用ポンプ）と空気洗浄配管系（空気洗
浄用電動弁、空気洗浄用風量計、空気洗浄用エアーポン
プ）からなる。逆洗操作開始には活性炭混合部分の流動
スペースを確保するために活性炭処理水を処理塔に送り
水位レベルを上げる。ただし、逆洗開始時の水頭が十分
あればこの操作は省略できる。逆洗洗浄方法は、空気曝
気と水逆洗洗浄とを組み合わせ活性炭粒子表面の微生物
膜の剥離を極力抑えた方法と空気洗浄と水逆洗洗浄とを
組み合わせて逆洗効果を向上させる方法の選択が可能で
ある。空気曝気と水逆洗洗浄とを組み合わせた通常の逆
洗方法では、水逆洗洗浄効果をあげるために空気曝気に
より活性炭槽の流動化をはかる。空気洗浄開始水位レベ
ルはオーバフローレベルよりも低い位置に設定し、空気
曝気及び空気洗浄時に活性炭粒子が塔上部から流出しな
いようにしている。[Function] The controller automatically controls the backwashing of the downflow type biological activated carbon treatment tower using a controller. The system configuration consists of a level meter (backwashing start water level, air cleaning start water level, backwashing end water level) and water backflow. It consists of a washing pipe system (motor valve for back washing, flow meter for back washing, pump for back washing) and an air washing pipe system (motor valve for air washing, air meter for air washing, air pump for air washing). At the start of the backwashing operation, activated carbon treated water is sent to the treatment tower to increase the water level in order to secure a flow space for the activated carbon mixed portion. However, this operation can be omitted if the head at the start of backwashing is sufficient. The backwashing method is a method that combines air aeration and water backwashing to select a method that minimizes the separation of microbial membranes on the surface of activated carbon particles and a method that combines air washing and water backwashing to improve the backwashing effect. Is possible. In a normal backwashing method combining air aeration and water backwashing, the activated carbon tank is fluidized by air aeration in order to increase the water backwashing cleaning effect. The air cleaning start water level is set at a position lower than the overflow level so that activated carbon particles do not flow out of the top of the tower during air aeration and air cleaning.
【０００９】[0009]
【実施例】以下に本発明の実施例を図１を参照しながら
説明する。An embodiment of the present invention will be described below with reference to FIG.
【００１０】図１は本発明の生物活性炭処理塔の逆洗自
動制御方法を実施するためのシステムを示すもので、活
性炭処理塔１０は粒状活性炭層１１，フィルタ１２，処
理水集水部１３および逆洗水集水部１４からなる。すな
わち、塔最下部に処理水集水部１３があり、その上部に
活性炭１１を保持し処理水のみを通過させるフィルタ１
２がある。また、塔最上部には水逆洗浄時にオーバーフ
ローした逆洗排水を集水する逆洗水集水部１４があり、
ここでオーバーフローした逆洗排水は逆洗水１５として
排出される。FIG. 1 shows a system for implementing the method for automatically controlling backwashing of a biological activated carbon treatment tower according to the present invention. The activated carbon treatment tower 10 includes a granular activated carbon layer 11, a filter 12, a treated water collecting section 13, and It consists of a backwash water collecting part 14. That is, there is a treated water collecting section 13 at the bottom of the tower, and a filter 1 for holding activated carbon 11 and allowing only treated water to pass therethrough.
There are two. In addition, at the top of the tower, there is a backwash water collecting section 14 for collecting backwash wastewater overflowed during backwashing,
The backwash wastewater overflowed here is discharged as backwash water 15.
【００１１】また、図１において、１６は処理水用電動
弁、１７は逆洗用電動弁、１８は逆洗用流量計、１９は
逆洗用ポンプである。２０は空気洗浄用電動弁、２１は
空気洗浄用風量計、２２は空気洗浄用エアポンプ、２３
は逆洗制御用レベル計であり、２４はシステム制御用コ
ントローラである。In FIG. 1, reference numeral 16 denotes an electric valve for treated water, 17 an electric valve for backwashing, 18 a flowmeter for backwashing, and 19 a pump for backwashing. Reference numeral 20 denotes an electric valve for air cleaning, 21 denotes an air flow meter for air cleaning, 22 denotes an air pump for air cleaning, 23
Denotes a backwash control level meter, and 24 denotes a system control controller.
【００１２】図１のシステムにおいて、通常の活性炭処
理では、活性炭処理用原水を活性炭処理塔１０の上部よ
り供給し、この原水中の微量有機物・濁質成分等を活性
炭により吸着させ、処理水を処理水集水部１３に集め処
理水用電動弁１６を開状態にし処理水槽へ送る。通水を
継続すると、活性炭層１１への濁質成分等による吸着に
より除々に水頭が増加する。Ｌ１は逆洗終了時水位レベ
ル、Ｌ２は逆洗開始水位レベル、Ｌ３は空気洗浄開始水
位レベルである。この水頭の位置を逆洗制御用レベル計
２３により検出し、予め設定しておいた逆洗開始レベル
Ｌ２に達したら逆洗自動洗浄が開始される。In the system shown in FIG. 1, in the ordinary activated carbon treatment, raw water for activated carbon treatment is supplied from the upper part of the activated carbon treatment tower 10, and trace organic substances and turbid components in the raw water are adsorbed by the activated carbon, and the treated water is removed. The collected water is collected in the treated water collecting section 13 and the electric valve 16 for treated water is opened to be sent to the treated water tank. When the water flow is continued, the water head gradually increases due to the adsorption of the turbid components and the like to the activated carbon layer 11. L1 is a water level at the end of backwashing, L2 is a water level at the start of backwashing, and L3 is a water level at the start of air washing. The position of the water head is detected by the backwash control level meter 23, and when the backwash start level L2 is set in advance, the automatic backwashing is started.
【００１３】自動化逆洗洗浄では、システム洗浄用コン
トローラ２４により次のシーケンスで各機器の操作が行
われる。In the automatic backwashing, each device is operated by the system washing controller 24 in the following sequence.
【００１４】すなわち、（ステップ１）レベル計２３が
逆洗開始水位レベルＬ２を検出すると、（ステップ２）
活性炭処理用原水を停止し、コントローラ２４は処理水
用電動弁１６を閉にすると共に、（ステップ３）逆洗用
電動弁１７を開、逆洗用ポンプ１９を運転して活性炭処
理層１１を逆洗浄する。この逆洗浄作用により活性炭処
理塔１０の水位が上昇してレベルＬ３（空気洗浄逆洗開
始水位レベル）まで達すると、レベル計２３の検出信号
を基にコントローラ２４は、逆洗用電動弁１７を閉、逆
洗用ポンプ１９を停止させると共に、（ステップ４）空
気洗浄用電動弁２０を開、空気洗浄用ポンプ２２を運転
して空気曝気を行う。空気曝気操作継続時間は予め操作
員が設定しておく。That is, (Step 1) When the level meter 23 detects the backwashing start water level L2, (Step 2)
The raw water for activated carbon treatment is stopped, and the controller 24 closes the electric valve 16 for treated water, (Step 3) opens the electric valve 17 for backwashing, and operates the backwash pump 19 to operate the activated carbon treatment layer 11. Backwash. When the water level of the activated carbon treatment tower 10 rises to the level L3 (air cleaning backwashing start water level) due to the backwashing action, the controller 24 activates the backwash motorized valve 17 based on the detection signal of the level meter 23. The pump 19 for closing and backwashing is stopped, and (step 4) the electric valve 20 for air cleaning is opened, and the pump 22 for air cleaning is operated to perform air aeration. The duration of the air aeration operation is set in advance by the operator.
【００１５】また、（ステップ５）逆洗用電動弁１７を
開、逆流用ポンプ１０を運転し、逆洗用流量計１８の流
量信号が予め設定された設定値になるように逆洗用電動
弁１７の開度を調節して流量制御を実行する。水逆洗洗
浄継続時間は予め操作員が設定しておく。逆洗排水は活
性炭処理塔１０の上部よりオーバーフローし逆洗水集水
部１４へ流入し逆洗水１５として排出される。逆洗設定
時間経過後、逆洗用電動弁１７を閉、逆洗用ポンプを停
止させる。(Step 5) The backwash motor valve 17 is opened, the backflow pump 10 is operated, and the backwash motor is operated so that the flow signal of the backwash flowmeter 18 becomes a preset value. The flow rate control is executed by adjusting the opening of the valve 17. The operator sets the water backwashing continuation time in advance. The backwash water overflows from the upper part of the activated carbon treatment tower 10, flows into the backwash water collecting section 14, and is discharged as backwash water 15. After the elapse of the set backwashing time, the backwash electric valve 17 is closed, and the backwash pump is stopped.
【００１６】（ステップ６）通水開始操作として、処理
水電動弁１６を開状態にし、水逆洗洗浄後の活性炭塔１
０の水頭が減少し水位レベルＬ１（逆洗終了時水位レベ
ル）に達した時点で活性炭処理用原水の供給を開始す
る。(Step 6) As a water flow start operation, the treated water electric valve 16 is opened, and the activated carbon tower 1 after backwashing and washing is performed.
When the water head of 0 decreases and reaches the water level L1 (water level at the end of backwashing), supply of raw water for activated carbon treatment is started.
【００１７】逆洗洗浄による効果を上げるために、ステ
ップ４において「空気洗浄」を行う。この場合、空気洗
浄用電動弁２０を開にしてその後洗浄用エアポンプ２２
を運転する。空気洗浄用風量計２１の流量値信号が予め
設定された設定値になるように空気洗浄用電動弁１７の
開度を調節して流量制御を行う。空気逆洗洗浄継続時間
は予め操作員が設定しておく。In order to enhance the effect of the backwashing, "air cleaning" is performed in step 4. In this case, the air cleaning electric valve 20 is opened, and then the cleaning air pump 22 is opened.
To drive. The flow rate is controlled by adjusting the opening degree of the air cleaning electric valve 17 so that the flow value signal of the air cleaning air flow meter 21 becomes a preset value. The air backwashing continuation time is set in advance by an operator.
【００１８】ステップの意味及び留意点は次の通りであ
る。The meanings and points to be noted of the steps are as follows.
【００１９】（１）ステップ３［処理水送水］は、ステ
ップ４で［空気曝気］、［空気洗浄］を行う際に活性炭
混合部分の流動スペースを確保するための操作であり、
逆洗開始時の水頭が十分あれば水位レベルＬ２，Ｌ３を
共通化しステップ３を省略することも可能である。(1) Step 3 [Water treatment water supply] is an operation for securing a flow space for the activated carbon mixed portion when performing [air aeration] and [air cleaning] in step 4;
If the water head at the start of backwashing is sufficient, the water level levels L2 and L3 can be made common and step 3 can be omitted.
【００２０】（２）ステップ４［空気曝気］の継続時間
は、活性炭が流動状態となるような最小の時間設定を行
い、活性炭粒子の摩耗と表面の微生物剥離を最小限に抑
える。(2) The duration of step 4 [air aeration] is set to a minimum time so that the activated carbon is in a fluidized state, thereby minimizing wear of the activated carbon particles and microbial detachment on the surface.
【００２１】（３）ステップ５［水逆洗洗浄］時の逆洗
流量は、活性炭層の層膨張率を通常３０〜４０％程度に
なるように流量設定・調節し、活性炭粒子が流出しなし
ようにする。(3) The backwashing flow rate in step 5 [water backwashing] is set and adjusted so that the coefficient of expansion of the activated carbon layer is usually about 30 to 40%, so that activated carbon particles do not flow out. To try.
【００２２】（４）ステップ４にて［空気洗浄］を実施
するかの判断として、数回の逆洗操作ごとに［空気洗
浄］を設定する事も可能であるし、通常の逆洗浄操作の
時間間隔が短縮し、ある設定時間以下になった時点［空
気洗浄］を実施することも可能である。(4) As a judgment as to whether or not to perform [air washing] in step 4, it is possible to set [air washing] every several backwash operations, or to perform a normal backwash operation. It is also possible to execute the [air cleaning] when the time interval is shortened and becomes less than a certain set time.
【００２３】[0023]
【発明の効果】本発明は上述の如くであって、活性炭処
理塔に処理すべき原水を通流させた後に処理槽に導び
き、前記原水を処理するものにおいて、前記生物活性炭
処理塔内の逆洗終了時水位レベル、逆洗開始水位レベ
ル、および空気洗浄開始レベルを予め設定する工程と、
前記生物活性炭処理塔の水頭が前記設定された逆洗開始
レベルに達したときに前記生物活性炭処理塔への前記原
水の通水を停止すると共に逆洗を開始する工程と、その
後、前記生物活性炭処理塔の水頭が前記設定された空気
洗浄開始レベルに達したときに逆洗を停止して所定時間
の空気洗浄を開始する工程と、前記空気洗浄終了後に再
び所定時間の逆洗を開始して逆洗排水を前記生物活性炭
処理塔からオーバーフローさせる工程と、前記逆洗の所
定時間経過後に前記処理槽へ処理水を導き、前記生物活
性炭処理塔の水頭が前記設定された逆洗終了時水位レベ
ルに達したときに前記原水の通水を再開する工程とから
なることを特徴とするものであっるから、操作員があら
かじめ必要な設定値（レベル計水位、流量、風量、時間
設定）を定めておけば、自動で逆洗操作を行うことがで
きる。また、水逆洗洗浄と空気曝気とを組み合わせるこ
とにより、活性炭粒子表面の微生物膜の剥離を極力抑え
た逆洗操作が可能であり、また、活性炭層の汚濁物質の
蓄積程度に応じて空気洗浄を組み込むことができ洗浄効
果を上げることができる。さらに、高度浄水処理におい
て下向流式生物活性炭処理塔の逆洗自動制御を行うこと
により、活性炭処理操作の信頼性向上、ひいては浄水工
程全体の信頼性向上につながる。The present invention is as described above, and comprises an activated carbon treatment.
After flowing the raw water to be treated into the tower,
Can, in which process the raw water, the biological activated carbon
Water level at the end of backwash in the treatment tower, water level at backwash start
Setting the air and air cleaning start level in advance,
The head of the biological activated carbon treatment tower starts backwashing at the set time
When the level is reached, the source
A step of stopping water flow and starting backwashing, and
Then, the head of the biological activated carbon treatment tower is set to the air
Stop backwashing when the cleaning start level is reached
Starting the air cleaning, and restarting after the air cleaning.
And start backwashing for a specified period of time,
A step of overflowing from the treatment tower, and
After a lapse of a fixed time, the treated water is guided to the treatment tank, and the biological activity is
The head of the charcoal treatment tower is at the water level
Restarting the flow of the raw water when the water reaches
Therefore, if an operator previously sets necessary setting values (level meter water level, flow rate, air volume, time setting), the backwashing operation can be performed automatically. In addition, by combining backwashing with water and air aeration, a backwashing operation that minimizes the separation of microbial membranes on the surface of activated carbon particles is possible, and air washing is performed according to the degree of accumulation of pollutants in the activated carbon layer. Can be incorporated to increase the cleaning effect. Further, by performing automatic backwashing control of the downflow type biological activated carbon treatment tower in the advanced water purification treatment, the reliability of the activated carbon treatment operation is improved, and the reliability of the entire water purification process is improved.
【図１】本発明の実施例による生物活性炭処理塔の逆洗
自動制御方法を実施するための逆洗自動制御システムの
ブロック図。FIG. 1 is a block diagram of an automatic backwashing control system for implementing an automatic backwashing control method for a biological activated carbon treatment tower according to an embodiment of the present invention.
【図２】一般の浄水プロセスのブロック図。FIG. 2 is a block diagram of a general water purification process.
１０…活性炭処理塔、１１…粒状活性炭、１２…フィル
タ、１３…処理水集水部、１４…逆洗水集水部、１５…
逆洗水、１６…処理水用電動弁、１７…逆洗用電動弁、
１８…逆洗用流量計、１９…逆洗用ポンプ、２０…空気
洗浄用電弁、２１…空気洗浄用風量計、２２…エアポン
プ、２３…逆洗制御用レベル計、２４…システム制御用
コントローラ。10 activated carbon treatment tower, 11 granular activated carbon, 12 filter, 13 treated water collecting section, 14 backwash water collecting section, 15
Backwash water, 16 ... Electric valve for treated water, 17 ... Electric valve for backwash,
18: Backwash flow meter, 19: Backwash pump, 20: Air valve for air washing, 21: Air flow meter for air washing, 22: Air pump, 23: Level meter for backwash control, 24: Controller for system control .
Claims (1)
せた後に処理槽に導びき、前記原水を処理するものにお
いて、前記生物活性炭処理塔内の逆洗終了時水位レベル、逆洗
開始水位レベルおよび空気洗浄開始レベルを予め設定す
る工程と、 前記生物活性炭処理塔の水頭が前記設定された逆洗開始
レベルに達したときに前記生物活性炭処理塔への前記原
水の通水を停止すると共に逆洗を開始する工程と、 その後、前記生物活性炭処理塔の水頭が前記設定された
空気洗浄開始レベルに達したときに逆洗を停止して所定
時間の空気洗浄を開始する工程と、 前記空気洗浄終了後に再び所定時間の逆洗を開始して逆
洗排水を前記生物活性炭処理塔からオーバーフローさせ
る工程と、 前記逆洗の所定時間経過後に前記処理槽へ処理水を導
き、前記生物活性炭処理塔の水頭が前記設定された逆洗
終了時水位レベルに達したときに前記原水の通水を再開
する工程とからなる ことを特徴とする生物活性炭処理塔
の逆洗自動制御方法。1. A guide sawn into the treatment tank after flowed through the raw water to be processed activated carbon treatment column, in which process the raw water backwash at the end water level of the biological activated carbon treatment tower, backwash
Set the starting water level and air cleaning start level in advance.
And the head of the biological activated carbon treatment tower is set to the set backwashing start.
When the level is reached, the source
Stopping the flow of water and starting backwashing, and then setting the head of the biological activated carbon treatment tower to the set value.
Stop backwash when the air cleaning start level is reached and
Starting air cleaning for a time, and starting backwashing again for a predetermined time after the air cleaning is completed.
The washing wastewater overflows from the biological activated carbon treatment tower.
And introducing treated water to the treatment tank after a lapse of a predetermined time of the backwashing.
When the head of the biological activated carbon treatment tower is
When the end water level is reached, restart the flow of the raw water
A method for automatically controlling backwashing of a biological activated carbon treatment tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18427891A JP3149465B2 (en) | 1991-07-24 | 1991-07-24 | Automatic backwash control method for biological activated carbon treatment tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18427891A JP3149465B2 (en) | 1991-07-24 | 1991-07-24 | Automatic backwash control method for biological activated carbon treatment tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0523664A JPH0523664A (en) | 1993-02-02 |
| JP3149465B2 true JP3149465B2 (en) | 2001-03-26 |
Family
ID=16150521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18427891A Expired - Fee Related JP3149465B2 (en) | 1991-07-24 | 1991-07-24 | Automatic backwash control method for biological activated carbon treatment tower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3149465B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100358167B1 (en) * | 1999-02-09 | 2002-10-25 | 엘지건설 주식회사 | An equipment and method for the automatic backwashing of activated carbon process |
| KR100378924B1 (en) * | 2000-05-03 | 2003-04-07 | 윤복현 | The treatment device for sewage |
| KR20030021022A (en) * | 2001-09-05 | 2003-03-12 | 주식회사 유니테크 | A sewage water treatment system and method, using activated carbon fiber |
| JP6599096B2 (en) * | 2014-11-25 | 2019-10-30 | 水ｉｎｇ株式会社 | Filtration basin cleaning method and water treatment apparatus |
| CN107938742A (en) * | 2017-11-21 | 2018-04-20 | 谢安鹏 | A kind of stream cleaner |
-
1991
- 1991-07-24 JP JP18427891A patent/JP3149465B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0523664A (en) | 1993-02-02 |
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