JPH07256294A - Living waste water treatment apparatus - Google Patents
Living waste water treatment apparatusInfo
- Publication number
- JPH07256294A JPH07256294A JP5092394A JP5092394A JPH07256294A JP H07256294 A JPH07256294 A JP H07256294A JP 5092394 A JP5092394 A JP 5092394A JP 5092394 A JP5092394 A JP 5092394A JP H07256294 A JPH07256294 A JP H07256294A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- screen
- sewage
- membrane
- 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.)
- Granted
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、比較的規模が小さく、
内部に膜分離装置を設けた生活排水処理装置に関する。The present invention has a relatively small scale,
The present invention relates to a domestic wastewater treatment device having a membrane separation device inside.
【０００２】[0002]
【従来の技術】従来、下水道が普及していない地域にお
いては、集合住宅やホテル等から排出する生活排水を処
理するために小規模な生活排水処理装置を設置してい
る。このような生活排水処理装置は、嫌気性菌による生
物学的処理を行う腐敗槽、砕石層によって排水の濾過を
行う濾過槽、好気性菌による生物学的処理を行う酸化
槽、処理水の固液を分離する沈降分離槽、処理水を薬品
によって消毒する消毒槽等を備えている。2. Description of the Related Art Conventionally, in an area where sewerage is not widely used, a small-scale domestic wastewater treatment device is installed to treat domestic wastewater discharged from an apartment house or a hotel. Such domestic wastewater treatment equipment includes a septic tank for biological treatment with anaerobic bacteria, a filtration tank for filtering wastewater with a crushed stone layer, an oxidation tank for biological treatment with aerobic bacteria, and a solid wastewater treatment system. It is equipped with a sedimentation separation tank for separating liquid, a disinfection tank for disinfecting treated water with chemicals, and the like.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記した集合
住宅やホテル等の小規模施設においては、生活排水の排
出形態が１日当りの排水量の５０％を３時間の間に排出
するものとなるなど、排出量の変動が大きく、汚泥の沈
殿分離の不備や、未浄化のままに処理水が放流されてし
まうなどの問題があった。また、汚泥の沈殿分離が不備
となると、槽内の硝化菌が系外に流出し、汚泥濃度の低
下によって窒素除去が不完全となる問題があった。However, in the above-mentioned small-scale facilities such as apartment houses and hotels, the discharge form of domestic wastewater is such that 50% of the daily discharge amount is discharged within 3 hours. However, there were problems such as large fluctuations in the amount of discharge, inadequate sedimentation and separation of sludge, and the discharge of treated water without purification. In addition, if the sludge sludge separation is insufficient, the nitrifying bacteria in the tank flow out to the outside of the system, and there is a problem that the nitrogen removal is incomplete due to the decrease in the sludge concentration.
【０００４】本発明は上記課題を解決するものであり、
沈殿分離に替えて膜分離装置を組み込むことによって汚
泥の流出および未浄化の処理水の放流を防止する生活排
水処理装置を提供することを目的とする。The present invention is intended to solve the above problems,
An object of the present invention is to provide a domestic wastewater treatment device that prevents sludge outflow and discharge of unpurified treated water by incorporating a membrane separation device instead of sedimentation separation.
【０００５】[0005]
【課題を解決するための手段】上記した課題を解決する
ために、本発明の生活排水処理装置は、汚水が流入する
流量調整兼汚泥貯留槽と、流量調整兼汚泥貯留槽に越流
堰を介して隣接し内部に散気装置を配設したスクリーン
槽と、スクリーン槽にスクリーンを介して連通する曝気
槽と、曝気槽に浸漬してなり、モジュールケース内の上
部位置に複数の膜カートリッジを適当間隔を開けて平行
に配設するとともに、モジュールケース内で膜カートリ
ッジの下方に曝気装置を配設した浸漬型膜分離装置と、
浸漬型膜分離装置に吸引管を通して吸引負圧を作用させ
る膜透過液吸引ポンプと、浸漬型膜分離装置の膜を透過
した処理水を吸引管を通して導く消毒槽と、流量調整兼
汚泥貯留槽からスクリーン槽に汚水を移送する汚水移送
ポンプと、曝気槽から流量調整兼汚泥貯留槽へ混合液を
循環させる混合液循環ポンプと、流量調整兼汚泥貯留槽
内の液位を検出する液位センサと、液位センサが検出し
た液位に基づいて膜透過液吸引ポンプの起動・停止を制
御する制御装置とを設けた構成とするものである。In order to solve the above-mentioned problems, the domestic wastewater treatment apparatus of the present invention has a flow rate adjusting and sludge storage tank into which wastewater flows, and an overflow weir in the flow rate adjusting and sludge storage tank. A screen tank with an air diffuser inside and adjacent to each other via a screen, an aeration tank communicating with the screen tank via a screen, and an aeration tank, and a plurality of membrane cartridges are placed at the upper position in the module case. An immersion type membrane separation device, which is arranged in parallel at appropriate intervals and in which an aeration device is arranged below the membrane cartridge in the module case,
From the membrane permeate suction pump that applies suction negative pressure through the suction pipe to the submerged membrane separation device, the disinfection tank that guides the treated water that has permeated the membrane of the submerged membrane separation device through the suction pipe, and the flow rate adjustment and sludge storage tank A sewage transfer pump that transfers sewage to the screen tank, a mixed solution circulation pump that circulates the mixed solution from the aeration tank to the sludge storage tank, and a liquid level sensor that adjusts the flow rate and detects the liquid level in the sludge storage tank. A control device for controlling the start / stop of the membrane permeated liquid suction pump based on the liquid level detected by the liquid level sensor is provided.
【０００６】[0006]
【作用】上記した構成により、流量調整兼汚泥貯留槽に
おいては、汚水移送ポンプによって槽内の汚水が後述す
る適当な流量をもってスクリーン槽へ流出する一方で、
越流堰を介してスクリーン槽から槽内液が越流し、さら
には混合液循環ポンプによって曝気槽内の混合液が硝化
液として還流する。この状態で槽内では汚水中のＢＯＤ
を炭素源として脱窒素処理が進行し、汚水中のＢＯＤの
大半を脱窒素反応に伴って消費し、結果として後述する
曝気槽における硝化を促進する。上述の汚水移送ポンプ
による汚水の移送量は、越流堰を介してスクリーン槽か
ら槽内液が常に流量調整兼汚泥貯留槽に越流する状態を
維持できる量とする。したがって、移送量は膜透過液吸
引ポンプによる引抜量と混合液循環ポンプによる循環量
を和した量より大きなものとする。With the above-described structure, in the sludge storage tank for adjusting the flow rate, the wastewater in the tank flows out to the screen tank at an appropriate flow rate described later by the wastewater transfer pump.
The in-tank liquid overflows from the screen tank through the overflow weir, and further, the mixed liquid in the aeration tank is refluxed as a nitrification liquid by the mixed liquid circulation pump. BOD in the wastewater in the tank in this state
As a carbon source, the denitrification process proceeds, and most of the BOD in the wastewater is consumed along with the denitrification reaction, and as a result, nitrification in the aeration tank described later is promoted. The amount of sewage transferred by the sewage transfer pump described above should be an amount that can maintain the state in which the in-tank liquid from the screen tank always overflows into the sludge storage tank through the overflow weir. Therefore, the transfer amount should be larger than the sum of the withdrawal amount by the membrane permeate suction pump and the circulating amount by the mixed liquid circulation pump.
【０００７】スクリーン槽においては、槽内の汚水が越
流堰を越流して流量調整兼汚泥貯留槽に還流するととも
に、スクリーンを通って曝気槽に自然流下する。このと
き、曝気槽へ流下する汚水中からスクリーンによって夾
雑物を除去し、散気装置から噴出する空気のエアリフト
作用によって生起する上向流によってスクリーン滓を洗
い流し、除去した夾雑物を汚水とともに越流堰を通して
流量調整兼汚泥貯留槽へ返送する。In the screen tank, the wastewater in the tank overflows the overflow weir and returns to the sludge storage tank for adjusting the flow rate, and also naturally flows down to the aeration tank through the screen. At this time, contaminants are removed from the sewage flowing down to the aeration tank by a screen, and the screen slag is washed away by the upward flow generated by the air lift action of the air ejected from the air diffuser, and the removed contaminants are overflowed with the sewage. It returns to the sludge storage tank through the weir for adjusting the flow rate.
【０００８】曝気槽においては、液位センサで検出する
流量調整兼汚泥貯留槽の液位が上位設定値に達した時点
で制御装置によって膜透過液吸引ポンプを起動し、液位
が下位設定値に達した時点で膜透過液吸引ポンプを停止
する。この間に、浸漬型膜分離装置の曝気装置から空気
を間欠的に、例えば１時間曝気し１時間停止するように
して供給し、曝気時の好気状態において混合液中のＢＯ
Ｄの分解とアンモニアの硝化処理を行い、空気の供給を
停止した嫌気状態において混合液中のＢＯＤを炭素源と
して脱窒素反応を生起させる。In the aeration tank, the membrane permeate suction pump is activated by the control unit when the liquid level in the sludge storage tank for adjusting the flow rate detected by the liquid level sensor reaches the upper set value, and the liquid level is set to the lower set value. When it reaches, the membrane permeate suction pump is stopped. During this period, air is intermittently supplied from the aeration device of the immersion type membrane separation device, for example, so as to aerate for 1 hour and then stop for 1 hour.
Decomposition of D and nitrification treatment of ammonia are performed, and in an anaerobic state in which air supply is stopped, a denitrification reaction is caused by using BOD in the mixed solution as a carbon source.
【０００９】膜透過液吸引ポンプの起動時には、吸引管
を通して浸漬型膜分離装置に吸引負圧を作用させ、各膜
カートリッジの濾過膜を通して曝気槽内の混合液の固液
を分離し、膜を透過した膜透過液を吸引管を通して消毒
槽へ導く。このとき、モジュールケース内ではエアリフ
ト作用によって生起する上向流が各膜カートリッジの膜
面上を掃流となって流れケーキ層の形成を抑制する。ま
た、上向流が曝気槽内の混合液を曝気混合することによ
り、混合液中の繊維や髪の毛等からなる塊が生成する
が、この生成した塊は硝化液とともに混合液循環ポンプ
を通って流量調整兼汚泥貯留槽に還流するので、塊が浸
漬型膜分離装置の各膜カートリッジ間に形成する膜間流
路を閉塞することを防止できる。When the membrane permeate suction pump is started, a negative suction pressure is applied to the submerged membrane separator through the suction pipe to separate the solid solution of the mixed solution in the aeration tank through the filtration membrane of each membrane cartridge. The permeated liquid that has permeated is guided to the disinfection tank through a suction tube. At this time, in the module case, the upward flow generated by the air lift action sweeps over the membrane surface of each membrane cartridge to suppress the formation of the flow cake layer. In addition, the upward flow aeration-mixes the mixed liquid in the aeration tank, whereby lumps composed of fibers and hair in the mixed liquid are generated.The generated lumps pass through the mixed liquid circulation pump together with the nitrification liquid. Since the flow rate is adjusted and the liquid is returned to the sludge storage tank, it is possible to prevent the block from blocking the intermembrane flow channel formed between the membrane cartridges of the submerged membrane separation apparatus.
【００１０】[0010]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図１において、流量調整兼汚泥貯留槽１には一
側上部に汚水流入路２が開口し、槽内には液位を検出す
る液位センサ３を設置している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the flow rate adjusting / sludge storage tank 1 has a sewage inflow passage 2 opened on one side and a liquid level sensor 3 for detecting the liquid level is installed in the tank.
【００１１】スクリーン槽４は越流堰５を介して流量調
整兼汚泥貯留槽１に隣接しており、槽内に散気装置６を
配設している。また、スクリーン槽４は仕切壁７を介し
て曝気槽８に隣接し、スクリーン槽４と曝気槽８は仕切
壁７の上端に設けた傾斜スクリーン９を介して連通して
いる。The screen tank 4 is adjacent to the flow rate adjusting and sludge storage tank 1 via an overflow weir 5, and an air diffuser 6 is arranged in the tank. Further, the screen tank 4 is adjacent to the aeration tank 8 via a partition wall 7, and the screen tank 4 and the aeration tank 8 are communicated with each other via an inclined screen 9 provided on the upper end of the partition wall 7.
【００１２】曝気槽８に浸漬した浸漬型膜分離装置１０
は、モジュールケース１１内の上部位置に複数の膜カー
トリッジ１２を適当間隔を開けて平行に配設するととも
に、モジュールケース１１内で膜カートリッジ１２の下
方に曝気装置１３を配設したものである。図２に示すよ
うに、膜カートリッジ１２は膜支持体１２ａの表裏面を
袋状の濾過膜１４で覆ったものであり、膜支持体１２ａ
と濾過膜１４の間には膜支持ネット１５を介装してい
る。また、膜支持体１２ａは一端側が表裏面に開口する
膜透過液通路１６を有しており、他端側が膜支持体１２
ａの上端縁に設けた吸込口部１７に連通している。各膜
カートリッジ１２は吸引チューブ１８を通して透過液吸
引ヘッダ１９に連通し、透過液吸引ヘッダ１９には膜透
過液吸引ポンプ２０を介在させた吸引管２１の一端が連
通している。この吸引管２１の他端は曝気槽８に隣接す
る消毒槽２２に連通し、消毒槽２２は処理水流出路２３
が開口している。Immersion type membrane separator 10 immersed in aeration tank 8
In the above, a plurality of membrane cartridges 12 are arranged in parallel at appropriate intervals in the module case 11, and an aerator 13 is arranged below the membrane cartridge 12 in the module case 11. As shown in FIG. 2, the membrane cartridge 12 includes a membrane support 12a having front and back surfaces covered with a bag-shaped filtration membrane 14.
A membrane support net 15 is interposed between the filter membrane 14 and the filter membrane 14. In addition, the membrane support 12a has a membrane permeate passage 16 that is open at the front and back sides on one end side and the membrane support 12 at the other end side.
It communicates with a suction port portion 17 provided at the upper edge of a. Each of the membrane cartridges 12 communicates with a permeated liquid suction header 19 through a suction tube 18, and one end of a suction pipe 21 having a membrane permeated liquid suction pump 20 interposed therein communicates with the permeated liquid suction header 19. The other end of the suction pipe 21 communicates with a disinfecting tank 22 adjacent to the aeration tank 8, and the disinfecting tank 22 is a treated water outflow passage 23.
Is open.
【００１３】流量調整兼汚泥貯留槽１とスクリーン槽４
の間には汚水をスクリーン槽４に移送する汚水移送エア
ーリフトポンプ２４を介装しており、流量調整兼汚泥貯
留槽１と曝気槽８の間には混合液を流量調整兼汚泥貯留
槽１へ循環させる混合液循環エアーリフトポンプ２５を
介装している。また、散気装置６と曝気装置１３には送
気管２６を介して送風機２７を接続している。Sludge storage tank 1 for adjusting flow rate and screen tank 4
A sewage transfer air lift pump 24 that transfers sewage to the screen tank 4 is interposed between the two, and a flow rate of the mixed liquid is adjusted between the sludge storage tank 1 and the aeration tank 8 as well. A mixed liquid circulation air lift pump 25 that circulates the liquid is interposed. Further, a fan 27 is connected to the air diffuser 6 and the aerator 13 via an air supply pipe 26.
【００１４】制御装置２８には液位センサ３と膜透過液
吸引ポンプ２０と送風機２７を接続しており、制御装置
２８は液位センサ３が検出した液位に基づいて膜透過液
吸引ポンプ２０の起動・停止を制御するとともに、送風
機２７を必要に応じて間欠運転する。The liquid level sensor 3, the membrane permeation liquid suction pump 20 and the blower 27 are connected to the control device 28, and the control device 28 uses the liquid permeation liquid suction pump 20 based on the liquid level detected by the liquid level sensor 3. The start / stop of the fan is controlled, and the blower 27 is intermittently operated as necessary.
【００１５】以下、上記した構成における作用を説明す
る。流量調整兼汚泥貯留槽１においては、汚水流入路２
から流入する汚水が滞留し、この汚水が汚水移送エアー
リフトポンプ２４によって後述する適当な流量をもって
スクリーン槽４へ流出する一方で、越流堰５を介してス
クリーン槽４から槽内液が越流し、さらには混合液循環
エアーリフトポンプ２５によって曝気槽８内の混合液が
硝化液として還流する。上述した汚水移送エアーリフト
ポンプ２４による汚水の移送量は、越流堰５を介してス
クリーン槽４から槽内液が常に流量調整兼汚泥貯留槽１
に越流する状態を維持できる量とする。したがって、移
送量は膜透過液吸引ポンプ２１による引抜量と混合液循
環エアーリフトポンプ２５による循環量を和した量より
大きなものとする。The operation of the above structure will be described below. In the flow rate adjusting and sludge storage tank 1, the wastewater inflow passage 2
Sewage flowing in from the stagnation stays, and this sewage flows out to the screen tank 4 by the sewage transfer air lift pump 24 at an appropriate flow rate described later, while the liquid in the tank overflows from the screen tank 4 via the overflow weir 5. Further, the mixed liquid circulating air lift pump 25 causes the mixed liquid in the aeration tank 8 to flow back as a nitrification liquid. As for the amount of sewage transferred by the sewage transfer air lift pump 24 described above, the amount of liquid in the tank from the screen tank 4 via the overflow weir 5 is always adjusted and the sludge storage tank 1 is also adjusted.
Sufficient to maintain the condition of overflow. Therefore, the transfer amount is larger than the sum of the withdrawal amount by the membrane permeated liquid suction pump 21 and the circulating amount by the mixed liquid circulation air lift pump 25.
【００１６】この状態で流量調整兼汚泥貯留槽１の内部
では汚水中のＢＯＤを炭素源として脱窒素処理が進行
し、汚水中のＢＯＤの大半を脱窒素反応に伴って消費
し、結果として後述する曝気槽８における硝化を促進す
る。In this state, inside the sludge storage tank 1 for adjusting the flow rate, the denitrification process proceeds using BOD in the wastewater as a carbon source, and most of the BOD in the wastewater is consumed along with the denitrification reaction. Promotes nitrification in the aeration tank 8.
【００１７】スクリーン槽４においては、流量調整兼汚
泥貯留槽１の汚水が汚水移送エアーリフトポンプ２４に
よって流出する一方で、槽内の汚水が越流堰５を越流し
て流量調整兼汚泥貯留槽１に還流するとともに、スクリ
ーン９を通って曝気槽８に自然流下する。このとき、ス
クリーン９は曝気槽８へ流下する汚水中から夾雑物を除
去する。このスクリーン９に付着したスクリーン滓とし
ての夾雑部は、散気装置６から噴出する空気のエアリフ
ト作用によって生起する気液二相の上向流によってスク
リーン９から洗い流されて汚水とともに越流堰５を通し
て流量調整兼汚泥貯留槽１へ返送される。In the screen tank 4, the wastewater in the flow rate adjusting and sludge storage tank 1 flows out by the wastewater transfer air lift pump 24, while the wastewater in the tank overflows the overflow weir 5 and the flow rate adjusting and sludge storage tank. While flowing back to 1, it naturally flows down to the aeration tank 8 through the screen 9. At this time, the screen 9 removes contaminants from the dirty water flowing down to the aeration tank 8. The contaminated portion as a screen slag attached to the screen 9 is washed away from the screen 9 by the gas-liquid two-phase upward flow generated by the air lift action of the air jetted from the air diffuser 6 and passes through the overflow weir 5 together with the sewage. It is returned to the sludge storage tank 1 which also adjusts the flow rate.
【００１８】曝気槽８においては、流量調整兼汚泥貯留
槽１の液位センサ３によって検出する液位が上昇局面に
おいて上位設定値ＨＬに達した時点で制御装置２８によ
り膜透過液吸引ポンプ２０を自動起動し、液位が下降局
面において下位設定値ＬＬに達した時点で制御装置２８
によって膜透過液吸引ポンプ２０を自動停止する。この
間に、送風機２７を間欠的に運転し、例えば１時間曝気
し、１時間停止する状態を繰り返す。In the aeration tank 8, when the liquid level detected by the liquid level sensor 3 of the flow rate adjusting / sludge storage tank 1 reaches the upper set value HL in the rising phase, the controller 28 controls the membrane permeated liquid suction pump 20. When the liquid level is automatically started and reaches the lower set value LL in the descending phase, the control device 28
Thus, the membrane permeate suction pump 20 is automatically stopped. During this time, the blower 27 is intermittently operated, aerated for 1 hour, and stopped for 1 hour, for example.
【００１９】そして、空気を供給する曝気時の好気状態
において混合液中のＢＯＤの分解とアンモニアの硝化処
理を行い、空気の供給を停止した嫌気状態において混合
液中のＢＯＤを炭素源として脱窒素反応を生起させる。
膜透過液吸引ポンプ２０が起動する状態においては、吸
引管２１を通して浸漬型膜分離装置１０に吸引負圧を作
用させ、各膜カートリッジ１２の濾過膜１４を通して曝
気槽８内の混合液の固液を分離する。膜を透過した膜透
過液は吸引管２１を通して消毒槽２２へ導き、次亜塩素
酸ナトリウム等の塩素系剤の添加によって消毒後に処理
水流出路２３を通して系外へ排出する。Then, the BOD in the mixed solution is decomposed and the nitrification treatment of ammonia is performed in an aerobic state at the time of supplying air, and the BOD in the mixed solution is removed as a carbon source in an anaerobic state in which the supply of air is stopped. It causes a nitrogen reaction.
When the membrane permeate suction pump 20 is activated, suction negative pressure is applied to the submerged membrane separation device 10 through the suction pipe 21, and the solid solution of the mixed liquid in the aeration tank 8 is passed through the filtration membrane 14 of each membrane cartridge 12. To separate. The membrane-permeated liquid that has permeated the membrane is guided to the disinfection tank 22 through the suction pipe 21, and is discharged to the outside of the system through the treated water outflow passage 23 after disinfection by adding a chlorine-based agent such as sodium hypochlorite.
【００２０】浸漬型膜分離装置１０のモジュールケース
１１内ではエアリフト作用によって生起する上向流が各
膜カートリッジ１２の膜面上を掃流となって流れケーキ
層の形成を抑制する。また、モジュールケース１１から
流れ出る上向流が曝気槽８内を攪拌流となって流れ、曝
気槽８内の混合液を曝気混合することにより、混合液中
の繊維や髪の毛等からなる塊が生成するが、この生成し
た塊は硝化液とともに混合液循環エアーリフトポンプ２
５を通って流量調整兼汚泥貯留槽１に還流するので、塊
が浸漬型膜分離装置１０の各膜カートリッジ１２間に形
成する膜間流路を閉塞することを防止できる。In the module case 11 of the submerged membrane separation apparatus 10, the upward flow generated by the air lift action sweeps the membrane surface of each membrane cartridge 12 to suppress the formation of a flow cake layer. Further, the upward flow flowing out from the module case 11 flows as an agitated flow in the aeration tank 8 and aerates and mixes the mixed liquid in the aeration tank 8 to generate a lump composed of fibers and hair in the mixed liquid. However, the generated lumps are mixed with the nitrification liquid and circulated in the mixed liquid circulating air lift pump 2
Since it flows back to the sludge storage tank 1 for adjusting the flow rate through 5, it is possible to prevent the block from blocking the intermembrane flow channel formed between the membrane cartridges 12 of the submerged membrane separation apparatus 10.
【００２１】このように、流量調整兼汚泥貯留槽１には
汚水中の夾雑物および余剰汚泥が蓄積するので、槽内の
汚泥濃度が２〜３％に達した時点でバキューム車によっ
て汚泥を引き抜く。As described above, since the impurities and excess sludge in the wastewater are accumulated in the sludge storage tank 1 for adjusting the flow rate, when the sludge concentration in the tank reaches 2-3%, the sludge is drawn out by the vacuum truck. .
【００２２】[0022]
【発明の効果】以上述べたように、本発明によれば、曝
気槽において浸漬型膜分離装置を通して処理水を取り出
すので、槽内の汚泥が系外へ流出することを防止でき
る。スクリーン槽において除去した夾雑物を越流堰を通
して流量調整兼汚泥貯留槽へ返送し、曝気槽の曝気攪拌
によって生起した繊維等の塊および浸漬型膜分離装置に
よって濃縮した分離を混合液循環ポンプによって流量調
整兼汚泥貯留槽へ返送するので、流量調整兼汚泥貯留槽
に汚水中の夾雑物および余剰汚泥を蓄積させるととも
に、浸漬型膜分離装置における膜間流路の閉塞を防止で
きる。また、流量調整兼汚泥貯留槽の液位の変動に応じ
て膜透過液吸引ポンプの起動・停止を制御することによ
り、流入水量の変動に影響されることなく汚水を確実に
浄化して未浄化の処理水の放流を防止することができ
る。As described above, according to the present invention, since the treated water is taken out through the submerged membrane separation device in the aeration tank, the sludge in the tank can be prevented from flowing out of the system. Contaminants removed in the screen tank are returned to the sludge storage tank through the overflow weir to adjust the flow rate, and the lumps of fibers, etc. generated by aeration and agitation in the aeration tank and the separation concentrated by the immersion type membrane separation device are separated by the mixed solution circulation pump. Since the flow rate is adjusted and returned to the sludge storage tank, it is possible to accumulate impurities and excess sludge in the waste water in the flow rate adjustment / sludge storage tank and prevent clogging of the intermembrane flow channel in the immersion type membrane separation device. In addition, by controlling the start / stop of the membrane permeate suction pump according to the flow rate adjustment and the fluctuation of the liquid level in the sludge storage tank, the sewage can be reliably purified and unpurified without being affected by the fluctuation of the inflow water amount. It is possible to prevent the treated water from being discharged.
【図１】本発明の一実施例を示す生活排水処理装置の全
体構成図である。FIG. 1 is an overall configuration diagram of a domestic wastewater treatment device showing an embodiment of the present invention.
【図２】同実施例における膜カートリッジの断面図であ
る。FIG. 2 is a cross-sectional view of the membrane cartridge according to the same embodiment.
１ 流量調整兼汚泥貯留槽 ３ 液位センサ ４ スクリーン槽 ５ 越流堰 ６ 散気装置 ８ 曝気槽 ９ スクリーン １０ 浸漬型膜分離装置 １３ 曝気装置 ２０ 膜透過液吸引ポンプ ２１ 吸引管 ２２ 硝化槽 ２８ 制御装置 1 Flow rate adjusting and sludge storage tank 3 Liquid level sensor 4 Screen tank 5 Overflow weir 6 Aeration device 8 Aeration tank 9 Screen 10 Immersion type membrane separation device 13 Aeration device 20 Membrane permeation liquid suction pump 21 Suction pipe 22 Nitrification tank 28 Control apparatus
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｄ 61/22 9153−4Ｄ Ｃ０２Ｆ 1/44 Ｋ 9153−4Ｄ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI Technical display location B01D 61/22 9153-4D C02F 1/44 K 9153-4D
Claims (1)
と、流量調整兼汚泥貯留槽に越流堰を介して隣接し内部
に散気装置を配設したスクリーン槽と、スクリーン槽に
スクリーンを介して連通する曝気槽と、曝気槽に浸漬し
てなり、モジュールケース内の上部位置に複数の膜カー
トリッジを適当間隔を開けて平行に配設するとともに、
モジュールケース内で膜カートリッジの下方に曝気装置
を配設した浸漬型膜分離装置と、浸漬型膜分離装置に吸
引管を通して吸引負圧を作用させる膜透過液吸引ポンプ
と、浸漬型膜分離装置の膜を透過した処理水を吸引管を
通して導く消毒槽と、流量調整兼汚泥貯留槽からスクリ
ーン槽に汚水を移送する汚水移送ポンプと、曝気槽から
流量調整兼汚泥貯留槽へ混合液を循環させる混合液循環
ポンプと、流量調整兼汚泥貯留槽内の液位を検出する液
位センサと、液位センサが検出した液位に基づいて膜透
過液吸引ポンプの起動・停止を制御する制御装置とを設
けたことを特徴とする生活排水処理装置。1. A sludge storage tank for adjusting the flow rate of sewage, a screen tank adjacent to the flow rate adjusting and sludge storage tank with an overflow weir, and a screen for the screen tank. An aeration tank that communicates with each other via the aeration tank, and a plurality of membrane cartridges are arranged in parallel at appropriate intervals at the upper position in the module case.
The submerged membrane separation device, in which the aeration device is arranged below the membrane cartridge in the module case, the membrane permeate suction pump that applies suction negative pressure through the suction pipe to the submerged membrane separation device, and the submerged membrane separation device Disinfection tank that guides the treated water that has passed through the membrane through a suction pipe, a sewage transfer pump that transfers the sewage from the sludge storage tank to the screen tank, and a mixing tank that circulates the mixed liquid from the aeration tank to the sludge storage tank. A liquid circulation pump, a liquid level sensor that adjusts the flow rate and detects the liquid level in the sludge storage tank, and a control device that controls the start / stop of the membrane permeation liquid suction pump based on the liquid level detected by the liquid level sensor. A domestic wastewater treatment device characterized by being provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05092394A JP3171746B2 (en) | 1994-03-23 | 1994-03-23 | Domestic wastewater treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05092394A JP3171746B2 (en) | 1994-03-23 | 1994-03-23 | Domestic wastewater treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07256294A true JPH07256294A (en) | 1995-10-09 |
| JP3171746B2 JP3171746B2 (en) | 2001-06-04 |
Family
ID=12872329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05092394A Expired - Lifetime JP3171746B2 (en) | 1994-03-23 | 1994-03-23 | Domestic wastewater treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3171746B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002205087A (en) * | 2001-01-09 | 2002-07-23 | Kubota Corp | Air diffuser |
| WO2009118788A1 (en) * | 2008-03-27 | 2009-10-01 | 株式会社クボタ | Membrane element and membrane module |
| JP2009247989A (en) * | 2008-04-07 | 2009-10-29 | Daiei Sangyo Kk | Septic tank |
| JP5611032B2 (en) * | 2008-03-27 | 2014-10-22 | 株式会社クボタ | Immersion membrane separator |
| CN114262659A (en) * | 2021-12-03 | 2022-04-01 | 中国船舶重工集团公司第七0四研究所 | Automatic bacteria culture system for marine domestic sewage treatment device |
| CN114635879A (en) * | 2022-04-08 | 2022-06-17 | 河南天原智控环保科技有限公司 | Air lift pump capable of conveying sludge and control method thereof |
-
1994
- 1994-03-23 JP JP05092394A patent/JP3171746B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002205087A (en) * | 2001-01-09 | 2002-07-23 | Kubota Corp | Air diffuser |
| WO2009118788A1 (en) * | 2008-03-27 | 2009-10-01 | 株式会社クボタ | Membrane element and membrane module |
| JP5441887B2 (en) * | 2008-03-27 | 2014-03-12 | 株式会社クボタ | Membrane element and membrane module |
| JP5611032B2 (en) * | 2008-03-27 | 2014-10-22 | 株式会社クボタ | Immersion membrane separator |
| JP2009247989A (en) * | 2008-04-07 | 2009-10-29 | Daiei Sangyo Kk | Septic tank |
| CN114262659A (en) * | 2021-12-03 | 2022-04-01 | 中国船舶重工集团公司第七0四研究所 | Automatic bacteria culture system for marine domestic sewage treatment device |
| CN114262659B (en) * | 2021-12-03 | 2024-06-04 | 中国船舶重工集团公司第七0四研究所 | Automatic bacteria culturing system for marine domestic sewage treatment device |
| CN114635879A (en) * | 2022-04-08 | 2022-06-17 | 河南天原智控环保科技有限公司 | Air lift pump capable of conveying sludge and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3171746B2 (en) | 2001-06-04 |
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