JP4384829B2 - Powder activated carbon circulation type membrane treatment method and apparatus - Google Patents

Powder activated carbon circulation type membrane treatment method and apparatus Download PDF

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Publication number
JP4384829B2
JP4384829B2 JP2001387533A JP2001387533A JP4384829B2 JP 4384829 B2 JP4384829 B2 JP 4384829B2 JP 2001387533 A JP2001387533 A JP 2001387533A JP 2001387533 A JP2001387533 A JP 2001387533A JP 4384829 B2 JP4384829 B2 JP 4384829B2
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Prior art keywords
activated carbon
separation membrane
raw water
powdered activated
membrane
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JP2003181451A (en
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辰彦 鈴木
妙子 黒沼
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Maezawa Industries Inc
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Maezawa Industries Inc
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    • 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

Description

【０００１】
【発明の属する技術分野】
本発明は、粉末活性炭循環型膜処理方法及び装置に関し、詳しくは、膜分離装置を用いた上水，下水，排水等を浄化処理する設備等において、原水中に含まれる溶解性有機成分や固体成分だけでなく、低分子有機成分も同時に除去することができる粉末活性炭循環型膜処理方法及び装置に関する。
【０００２】
【従来の技術】
原水中に粉末活性炭を投入して生物処理と膜処理とを行い、粉末活性炭を循環使用する方法、即ち粉末活性炭循環型膜処理は、ＭＦ膜やＵＦ膜では除去できない溶解成分のうち、低分子有機成分を粉末活性炭に吸着させるとともに、アンモニア性窒素等の溶解性有機物を膜分離汚泥中の微生物による生物学的酸化により酸化し、最終的に膜分離を行うことによって高度な分離除去を行うシステムとして知られている。
【０００３】
【発明が解決しようとする課題】
このような粉末活性炭循環型膜処理において、生物処理をより安定させるためには、水回収率を上げて処理槽内の生物量を増加させる必要がある。ところが、水回収率を上げると、活性炭に吸着せず、生物分解もされずに残った高分子有機物が、微生物（汚泥）や活性炭とともに分離膜の濃縮水中に濃縮されてしまうため、この高分子有機物によって膜孔が閉塞されてしまう可能性が高くなり、分離膜が閉塞し易くなって安定した運転状態が得られなくなってしまう。
【０００４】
そこで本発明は、膜分離における水回収率を向上させて処理槽内の生物量を増加させながら、高分子有機物による分離膜の閉塞を抑制して安定した状態で良好な処理水質を得ることができる粉末活性炭循環型膜処理方法及び装置を提供することを目的としている。
【０００５】
【課題を解決するための手段】
上記目的を達成するため、本発明の粉末活性炭循環型膜処理方法は、微生物による生物処理を行う原水中に粉末活性炭を投入して処理槽に設けた分離膜による固液分離を行い、分離膜を透過した水を処理水として抜き出すとともに、分離膜を透過せずに濃縮された微生物及び粉末活性炭を原水に循環させる粉末活性炭循環型膜処理方法において、前記分離膜を第１分離膜として、該第１分離膜に加えて前記処理槽に設けた、前記第１分離膜よりも大きな孔径で、原水中の微生物及び粉末活性炭を透過させずに原水中の高分子有機物を透過水と共に透過させる孔径を有する第２分離膜による固液分離を、前記第１分離膜によるろ過処理と同時に行って、粉末活性炭に吸着せずかつ生物分解もされずに原水中に残存している高分子有機物を前記第２分離膜により高分子有機物含有透過水として原水中から引き抜いて循環系外へ排出するとともに、前記濃縮された微生物及び粉末活性炭の前記原水への循環を前記処理槽底部から抜き取ることにより行うことを特徴としている。
【０００６】
また、本発明の粉末活性炭循環型膜処理装置は、微生物による生物処理を行う原水中に粉末活性炭を投入する粉末活性炭投入手段と、前記粉末活性炭を投入した原水を分離膜で固液分離する処理槽と、該処理槽で前記分離膜を透過した水を処理水として抜き出す透過水経路と、前記処理槽で分離膜を透過せずに濃縮された微生物及び粉末活性炭を原水に循環させる返送経路とを備えた粉末活性炭循環型膜処理装置において、前記分離膜を第１分離膜とし、さらに前記処理槽に、前記第１分離膜のろ過処理と同時に固液分離処理を行う第２分離膜を設け、該第２分離膜は、前記第１分離膜よりも大きな孔径で、原水中の微生物及び粉末活性炭を透過させずに原水中の高分子有機物を透過水と共に透過させる孔径を有し、前記第２分離膜を透過した高分子有機物含有透過水を循環系外に排出するドレン経路を設けるとともに、前記返送経路を前記処理槽底部に設けたことを特徴とし、特に、前記分離膜の公称孔径が０．１〜０．２μｍであり、前記第２の分離膜の公称孔径が０．８〜２μｍであることを特徴としている。
【０００７】
【発明の実施の形態】
図１は本発明の一形態例を示す粉末活性炭循環型膜処理装置の系統図である。この粉末活性炭循環型膜処理装置は、従来と同様の膜分離を行う第１分離膜１１と、この第１分離膜１１よりも大きな孔径を有する第２分離膜１２とを備えた処理槽１３の前段に、活性炭投入手段１４及び撹拌機１５を有する活性炭混合槽１６を設けたものであって、原水は、流入経路２１から活性炭混合槽１６に流入し、処理水は、第１分離膜１１の透過水経路２２から抜き出される。また、処理槽１３内で濃縮された汚泥は、ポンプ２３によって返送経路２４に抜き取られ、前記活性炭混合槽１６に返送される。
【０００８】
このような粉末活性炭循環型膜処理装置において、原水は、活性炭混合槽１６内で撹拌機１５で撹拌されながら、活性炭投入手段１４から投入される粉末活性炭及び汚泥返送経路２４から流入する返送汚泥、すなわち、生物処理を行うための微生物及び粉末活性炭を含む汚泥と混合し、経路２５を通って処理槽１３に流入する。
【０００９】
処理槽１３内では、原水中のアンモニア性窒素等の溶解性有機物が微生物による生物学的酸化によって酸化され、溶解性の低分子有機成分が粉末活性炭に吸着され、さらに、不溶性の固体成分が第１分離膜１１によって固液分離されることにより、これらが除去された処理水が透過水経路２２から抜き出される。また、処理槽１３内に濃縮された汚泥及び粉末活性炭は、槽底部から返送経路２４に引き抜かれて活性炭混合槽１６に循環する。このとき、一部の汚泥を余剰汚泥として経路２６に分岐させ、回収槽２７に引き抜くことができる。
【００１０】
さらに、処理槽１３では、前記第１分離膜１１による通常のろ過処理と同時に、前記第２分離膜１２による固液分離処理が行われ、活性炭に吸着せず、生物分解もされずに原水中に残存している高分子有機物が第２分離膜１２を透過して原水中から分離される。すなわち、図２の説明図に示すように、通常の膜処理に用いられているＭＦ膜やＵＦ膜からなり、その孔径（公称孔径）が０．１〜０．２μｍである第１分離膜１１では、原水中に存在する微生物３１や粉末活性炭３２及びこれらに付着している低分子有機成分３３、さらに、前記高分子有機物３４が第１分離膜１１の膜孔１１ａを透過しないので、該第１分離膜１１の透過水３５は、これらが含まれない清浄な処理水となる。
【００１１】
一方、第１分離膜１１よりも大きな孔径で、原水中の微生物３１及び粉末活性炭３２を透過させずに原水中の高分子有機物３４を透過させる孔径、好ましくは、公称孔径が０．８〜２μｍの第２分離膜１２では、高分子有機物３４が第２分離膜１２の透過水３６と共に膜孔１２ａを透過して原水中から分離され、透過水３６と共にドレン経路２８から回収槽２７に引き抜かれる。
【００１２】
このように、原水中に残存した高分子有機物３４を透過水と共に第２分離膜１２で原水中から引き抜くことにより、第１分離膜１１の目詰まりの要因となる高分子有機物３４の濃度を低くできるので、高分子有機物３４によって第１分離膜１１の膜孔が閉塞される可能性を低くすることができる。同時に、微生物３１と粉末活性炭３２とを効果的に濃縮した状態の返送汚泥を原水に循環混合することができるので、原水の生物処理が安定し、有機物濃度が下がり、高い回収率を維持したまま良好な生物分解と安定した膜の運転とを行うことができる。
【００１３】
なお、第２分離膜１２で引き抜く水量は、原水の状態や水回収率、生物分解の進行状況等の各種条件に応じて設定すればよいが、通常は、水回収率に見合う量をドレンとして循環系外の回収槽２７に排出すればよい。また、両分離膜は、従来からこの種の処理に用いられている中空糸膜等を用いた各種膜分離手段を用いることが可能であり、膜の種類も特に限定されるものではなく、原水の状態に応じて適宜選択することができ、例えば、ＭＦ膜，ＵＦ膜を好適に使用でき、さらに、適宜なメッシュの網状体を使用することも可能である。
【００１４】
さらに、回収槽２７内のドレンに含まれる高分子有機物は、汚泥の脱水処理や濃縮処理を行うことによって汚泥から分離した後、再び原水に混合して再処理することができる。また、両分離膜の洗浄は従来と同様にして行うことができ、例えば、ブロワ１７から膜下方の散気装置１８を介してエアスクラビングを行うことによって洗浄することができ、必要に応じて薬品洗浄を行うことができる。
【００１５】
【発明の効果】
以上説明したように、本発明によれば、粉末活性炭循環型膜処理における水回収率を向上させて処理槽内の生物量を増加させながら、高分子有機物による分離膜の閉塞を抑制して安定した運転状態で良好な処理水質を得ることができる。
【図面の簡単な説明】
【図１】 本発明の一形態例を示す粉末活性炭循環型膜処理装置の系統図である。
【図２】 第１分離膜及び第２分離膜におけるろ過状態を示す説明図である。
【符号の説明】
１１…第１分離膜、１２…第２分離膜、１３…処理槽、１４…活性炭投入手段、１５…撹拌機、１６…活性炭混合槽、２１…流入経路、２２…透過水経路、２３…ポンプ、２４…返送経路、２７…回収槽、２８…ドレン経路、３１…微生物、３２…粉末活性炭、３３…低分子有機成分、３４…高分子有機物、３５…第１分離膜１１の透過水、３６…第２分離膜１２の透過水[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a powdered activated carbon circulating membrane treatment method and apparatus, and more particularly, in a facility for purifying water, sewage, wastewater, etc. using a membrane separator, soluble organic components and solids contained in raw water The present invention relates to a powder activated carbon circulating membrane treatment method and apparatus capable of simultaneously removing not only components but also low molecular organic components.
[0002]
[Prior art]
A method in which powdered activated carbon is introduced into raw water to perform biological treatment and membrane treatment, and powdered activated carbon is circulated and used, that is, powder activated carbon circulation type membrane treatment is a low molecular weight component that cannot be removed by MF membranes or UF membranes. A system that adsorbs organic components to powdered activated carbon, oxidizes soluble organic substances such as ammonia nitrogen by biological oxidation by microorganisms in membrane separation sludge, and performs advanced separation and removal by finally performing membrane separation Known as.
[0003]
[Problems to be solved by the invention]
In such a powdered activated carbon circulation membrane treatment, in order to make the biological treatment more stable, it is necessary to increase the water recovery rate and increase the amount of biological matter in the treatment tank. However, when the water recovery rate is increased, the polymer organic matter that is not adsorbed on the activated carbon and is not biodegraded is concentrated in the concentrated water of the separation membrane together with microorganisms (sludge) and activated carbon. The possibility of the membrane pores being blocked by the organic matter is increased, and the separation membrane is likely to be blocked, so that a stable operation state cannot be obtained.
[0004]
Therefore, the present invention can improve the water recovery rate in membrane separation and increase the amount of organisms in the treatment tank, while suppressing clogging of the separation membrane by polymer organic matter and obtaining good treated water quality in a stable state. An object of the present invention is to provide a powder activated carbon circulation type membrane treatment method and apparatus.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the powder activated carbon circulating membrane treatment method of the present invention performs solid-liquid separation using a separation membrane provided in a treatment tank by introducing powdered activated carbon into raw water for biological treatment with microorganisms, and a separation membrane. In the powder activated carbon circulation membrane treatment method in which the permeated water is extracted as treated water and the concentrated microorganisms and powdered activated carbon are circulated to the raw water without passing through the separation membrane, the separation membrane is used as the first separation membrane, In addition to the first separation membrane, the pore size provided in the treatment tank is larger than the first separation membrane, and allows the macromolecular organic matter in the raw water to permeate with the permeated water without allowing the microorganisms and powdered activated carbon in the raw water to permeate. second frequency separation membrane of solid-liquid separation by the line I at the same time as the filtering processing by the first separation membrane, a polymer organic material which does not adsorb to the powdered activated carbon and without being also biodegradable remaining in the raw water having a It said first Thereby discharged into the circulation outside of have pull disconnect from raw water as the polymer organic substance-containing permeated water by partial separation membrane, be done by withdrawing the circulation to raw water of the concentrated microorganisms and powdered activated carbon from said processing bath bottom It is characterized by.
[0006]
Also, powdered activated carbon recycling film processing apparatus of the present invention, the solid-liquid separation and powdered activated carbon dosing means to inject powdered activated carbon in the raw water to perform the biological treatment, the raw water was charged the powdered activated carbon in the separation membrane due to microbial treatment a tank, a permeate path for extracting water having passed through the separation membrane in the processing tank as treated water, and return path for circulating the microorganisms and powdered activated carbon which has been concentrated separation membrane without being transmitted in the processing bath to the raw water in powdered activated carbon recycling film processing apparatus provided with the above separation membrane as a first separation layer, the more the processing bath, the second minute separation membrane simultaneously performed solid-liquid separation treatment and filtration of the first separation membrane provided, the second minute separation membrane is in the larger pore size than the first separation membrane, have a pore size that transmits raw water a polymer organic material together with the permeate without transmitting microorganisms and powdered activated carbon in the raw water, transmitted through the second minute separation membrane Rutotomoni provided drain path for discharging a polymer organic material-containing permeate out circulation, the return path is characterized in that provided in the processing tank bottom, in particular, the nominal pore size of the separation membrane from 0.1 to 0 2 μm, and the nominal pore size of the second separation membrane is 0.8 to 2 μm.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a system diagram of a powdered activated carbon circulating membrane treatment apparatus showing one embodiment of the present invention. This powder activated carbon circulation type membrane treatment apparatus includes a first separation membrane 11 that performs the same membrane separation as a conventional one, and a treatment tank 13 that includes a second separation membrane 12 having a larger pore diameter than the first separation membrane 11. In the preceding stage, an activated carbon mixing tank 16 having activated carbon charging means 14 and a stirrer 15 is provided, and raw water flows into the activated carbon mixing tank 16 from the inflow path 21, and treated water passes through the first separation membrane 11. It is extracted from the permeate passage 22. Further, the sludge concentrated in the treatment tank 13 is extracted to the return path 24 by the pump 23 and returned to the activated carbon mixing tank 16.
[0008]
In such a powdered activated carbon circulation type membrane treatment apparatus, raw water is stirred with the stirrer 15 in the activated carbon mixing tank 16, and the activated carbon charged from the activated carbon charging means 14 and the return sludge flowing in from the sludge return path 24, That is, it is mixed with microorganisms for biological treatment and sludge containing powdered activated carbon, and flows into the treatment tank 13 through the path 25.
[0009]
In the treatment tank 13, soluble organic substances such as ammonia nitrogen in raw water are oxidized by biological oxidation by microorganisms, soluble low-molecular organic components are adsorbed on the powdered activated carbon, and insoluble solid components are added first. By the solid-liquid separation by the 1 separation membrane 11, the treated water from which these have been removed is extracted from the permeate passage 22. Further, the sludge and powdered activated carbon concentrated in the treatment tank 13 are extracted from the tank bottom to the return path 24 and circulated to the activated carbon mixing tank 16. At this time, a part of the sludge can be branched to the path 26 as surplus sludge and pulled out to the collection tank 27.
[0010]
Further, in the treatment tank 13, a solid-liquid separation process using the second separation membrane 12 is performed simultaneously with a normal filtration process using the first separation membrane 11, and it is not adsorbed on activated carbon and is not biodegraded. The polymer organic matter remaining in the water permeates through the second separation membrane 12 and is separated from the raw water. That is, as shown in the explanatory diagram of FIG. 2, the first separation membrane 11 is composed of an MF membrane or a UF membrane used for normal membrane treatment, and the pore diameter (nominal pore diameter) is 0.1 to 0.2 μm. Then, since the microorganisms 31 and the powdered activated carbon 32 existing in the raw water, the low molecular organic component 33 adhering to them, and the high molecular organic substance 34 do not permeate the membrane hole 11a of the first separation membrane 11, the first The permeated water 35 of the 1 separation membrane 11 becomes clean treated water that does not contain these.
[0011]
On the other hand, the pore diameter is larger than that of the first separation membrane 11 and allows the polymer organic matter 34 in the raw water to permeate without passing through the microorganisms 31 and the powdered activated carbon 32 in the raw water, preferably the nominal pore diameter is 0.8 to 2 μm. In the second separation membrane 12, the polymer organic substance 34 is separated from the raw water through the membrane hole 12 a together with the permeated water 36 of the second separation membrane 12, and is drawn out from the drain path 28 to the recovery tank 27 together with the permeated water 36. .
[0012]
In this way, by pulling out the high molecular organic substance 34 remaining in the raw water from the raw water together with the permeated water by the second separation membrane 12, the concentration of the high molecular organic substance 34 that causes the clogging of the first separation membrane 11 is lowered. Therefore, the possibility that the pores of the first separation membrane 11 are blocked by the polymer organic substance 34 can be reduced. At the same time, since the return sludge in a state where the microorganisms 31 and the powdered activated carbon 32 are effectively concentrated can be circulated and mixed with the raw water, the biological treatment of the raw water is stable, the organic matter concentration is lowered, and the high recovery rate is maintained. Good biodegradation and stable membrane operation can be performed.
[0013]
The amount of water withdrawn by the second separation membrane 12 may be set according to various conditions such as the state of raw water, the water recovery rate, the progress of biodegradation, etc. Usually, the amount corresponding to the water recovery rate is used as the drain. What is necessary is just to discharge | emit to the collection tank 27 outside a circulation system. In addition, both separation membranes can use various membrane separation means using a hollow fiber membrane or the like conventionally used for this kind of treatment, and the type of membrane is not particularly limited. For example, an MF film or a UF film can be suitably used, and an appropriate mesh network can also be used.
[0014]
Furthermore, the polymer organic matter contained in the drain in the recovery tank 27 can be separated from the sludge by performing sludge dehydration or concentration treatment, and then mixed with the raw water again and reprocessed. Both separation membranes can be cleaned in the same manner as before, for example, by scrubbing air from the blower 17 through the air diffuser 18 below the membrane, and if necessary, chemicals Cleaning can be performed.
[0015]
【The invention's effect】
As described above, according to the present invention, while improving the water recovery rate in the powdered activated carbon circulation membrane treatment and increasing the amount of organisms in the treatment tank, the blockage of the separation membrane by the polymer organic matter is suppressed and stabilized. A good quality of treated water can be obtained in the operated state.
[Brief description of the drawings]
FIG. 1 is a system diagram of a powdered activated carbon circulating membrane treatment apparatus showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing filtration states in a first separation membrane and a second separation membrane.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... 1st separation membrane, 12 ... 2nd separation membrane, 13 ... Treatment tank, 14 ... Activated carbon injection means, 15 ... Stirrer, 16 ... Activated carbon mixing tank, 21 ... Inflow path, 22 ... Permeate water path, 23 ... Pump , 24 ... Return path, 27 ... Recovery tank, 28 ... Drain path, 31 ... Microorganism, 32 ... Powdered activated carbon, 33 ... Low molecular organic component, 34 ... High molecular organic substance, 35 ... Permeated water of the first separation membrane 11, 36 ... Permeated water of the second separation membrane 12

Claims (3)

微生物による生物処理を行う原水中に粉末活性炭を投入して処理槽に設けた分離膜による固液分離を行い、分離膜を透過した水を処理水として抜き出すとともに、分離膜を透過せずに濃縮された微生物及び粉末活性炭を原水に循環させる粉末活性炭循環型膜処理方法において、前記分離膜を第１分離膜として、該第１分離膜に加えて前記処理槽に設けた、前記第１分離膜よりも大きな孔径で、原水中の微生物及び粉末活性炭を透過させずに原水中の高分子有機物を透過水と共に透過させる孔径を有する第２分離膜による固液分離を、前記第１分離膜によるろ過処理と同時に行って、粉末活性炭に吸着せずかつ生物分解もされずに原水中に残存している高分子有機物を前記第２分離膜により高分子有機物含有透過水として原水中から引き抜いて循環系外へ排出するとともに、前記濃縮された微生物及び粉末活性炭の前記原水への循環を前記処理槽底部から抜き取ることにより行うことを特徴とする粉末活性炭循環型膜処理方法。Activated powdered activated carbon in raw water for biological treatment with microorganisms, and solid-liquid separation using a separation membrane provided in the treatment tank . The water that permeated the separation membrane was extracted as treated water and concentrated without passing through the separation membrane. In the powder activated carbon circulating membrane treatment method of circulating the activated microorganism and powdered activated carbon in raw water, the first separation membrane is provided in the treatment tank in addition to the first separation membrane as the first separation membrane in larger pore size than the solid-liquid separation by a second minute separation membrane having a pore size of transmitting raw water a polymer organic material together with the permeate without transmitting microorganisms and powdered activated carbon in the raw water, according to the first isolation layer filtration and row I simultaneously drawing a polymeric organic material that does not adsorb to the powdered activated carbon and without being also biodegradable remaining in the raw water from the raw water as the polymer organic substance-containing permeated water by the second minute separation membrane and disconnect As well as discharged to the ring system outside of powdered activated carbon recycling film processing method, which comprises carrying out by withdrawing the circulation to raw water of the concentrated microorganisms and powdered activated carbon from said processing bath bottom. 微生物による生物処理を行う原水中に粉末活性炭を投入する粉末活性炭投入手段と、前記粉末活性炭を投入した原水を分離膜で固液分離する処理槽と、該処理槽で前記分離膜を透過した水を処理水として抜き出す透過水経路と、前記処理槽で分離膜を透過せずに濃縮された微生物及び粉末活性炭を原水に循環させる返送経路とを備えた粉末活性炭循環型膜処理装置において、前記分離膜を第１分離膜とし、さらに前記処理槽に、前記第１分離膜のろ過処理と同時に固液分離処理を行う第２分離膜を設け、該第２分離膜は、前記第１分離膜よりも大きな孔径で、原水中の微生物及び粉末活性炭を透過させずに原水中の高分子有機物を透過水と共に透過させる孔径を有し、前記第２分離膜を透過した高分子有機物含有透過水を循環系外に排出するドレン経路を設けるとともに、前記返送経路を前記処理槽底部に設けたことを特徴とする粉末活性炭循環型膜処理装置。A powdered activated carbon dosing means to inject powdered activated carbon in the raw water to perform a biological treatment by microorganisms, a process tank for solid-liquid separation by the separation membrane raw water which supplied the powdered activated carbon, water that has passed through the separation membrane in the processing tank in powdered activated carbon recycling film processing apparatus having a permeate path withdrawn as treated water, and a return path for circulating the microorganisms and powdered activated carbon which is enriched with the separation membrane without being transmitted in the processing bath to the raw water, the separation the membrane was the first separation membrane, the more the processing bath, the first providing the second minute separation membrane simultaneously performed solid-liquid separation process filtration and separation membrane, the second minute separation membrane, the first separation in larger pore size than the membrane, the pore size of transmitting raw water a polymer organic material together with the permeate without transmitting microorganisms and powdered activated carbon in the raw water and organic, transparent polymeric organic material containing transmitted through the second minute separation membrane Discharge water out of the circulation system Rutotomoni provided Ren route, powdered activated carbon recycling film processing apparatus, characterized in that the return path provided in the treatment tank bottom. 前記分離膜の公称孔径が０．１〜０．２μｍであり、前記第２の分離膜の公称孔径が０．８〜２μｍであることを特徴とする請求項２記載の粉末活性炭循環型膜処理装置。  The powder activated carbon circulating membrane treatment according to claim 2, wherein the separation membrane has a nominal pore size of 0.1 to 0.2 µm, and the second separation membrane has a nominal pore size of 0.8 to 2 µm. apparatus.
JP2001387533A 2001-12-20 2001-12-20 Powder activated carbon circulation type membrane treatment method and apparatus Expired - Fee Related JP4384829B2 (en)

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