JPH02268889A - Treatment of sewage by hollow-fiber membrane - Google Patents
Treatment of sewage by hollow-fiber membraneInfo
- Publication number
- JPH02268889A JPH02268889A JP1091629A JP9162989A JPH02268889A JP H02268889 A JPH02268889 A JP H02268889A JP 1091629 A JP1091629 A JP 1091629A JP 9162989 A JP9162989 A JP 9162989A JP H02268889 A JPH02268889 A JP H02268889A
- Authority
- JP
- Japan
- Prior art keywords
- fiber membrane
- membrane
- hollow fiber
- suction
- bioreactor
- 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.)
- Pending
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 42
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 30
- 239000010865 sewage Substances 0.000 title claims abstract description 9
- 238000011282 treatment Methods 0.000 title claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 abstract description 8
- 239000010410 layer Substances 0.000 abstract 2
- 238000005056 compaction Methods 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 239000004576 sand Substances 0.000 description 7
- 238000005273 aeration Methods 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 239000010802 sludge Substances 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野１
本発明は、中空糸膜による汚水処理方法に係るものであ
り、更に詳しくは、生物反応処理と中空糸膜による固液
分離とを組み合わせた汚水処理方法に関するものである
。[Detailed Description of the Invention] [Industrial Application Field 1] The present invention relates to a wastewater treatment method using a hollow fiber membrane, and more specifically, a method that combines biological reaction treatment and solid-liquid separation using a hollow fiber membrane. This relates to sewage treatment methods.
Ｅ従来の技術１
従来、この種の汚水処理における固液分離は、平膜やチ
ューブラ−膜を使用したものが知られている。EPrior Art 1 Conventionally, solid-liquid separation in this type of sewage treatment using flat membranes or tubular membranes has been known.
しかしながら、上記従来の固液分離は、膜表面に濃度分
極の発生と泥のデル層が付着するのを防止するために、
混合液に乱流を与える必要があり、そのために所要動力
が大きくなるという問題点があった。However, in the conventional solid-liquid separation described above, in order to prevent the occurrence of concentration polarization and the adhesion of a del layer of mud on the membrane surface,
There is a problem in that it is necessary to create turbulence in the mixed liquid, which increases the required power.
また、膜面に付着したゲル層を剥離除去するためにボー
ル洗浄を必要としたり、さらに透過流量の制御が困難で
ある等の問題点があった。Further, there are other problems such as requiring ball cleaning to peel off the gel layer adhering to the membrane surface and making it difficult to control the permeation flow rate.
［発明が解決しようとする課題］
本発明は、上記従来の問題点を解決するためになされた
もので、その目的とするところは、生成デル層による膜
の目詰りを効果的に防止することができるだけでなく、
膜の透過流量を容易に制御して処理能力に柔軟性をもた
せることができ、さらに、装置をコンパクトに構成する
ことがでさる中空糸膜による汚水処理方法を提供するも
のである。[Problems to be Solved by the Invention] The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to effectively prevent clogging of the membrane by the generated Del layer. Not only can you
The object of the present invention is to provide a wastewater treatment method using a hollow fiber membrane in which the permeation flow rate through the membrane can be easily controlled to provide flexibility in treatment capacity, and the apparatus can be configured compactly.
［課題を解決するだめの手段］
本発明の中空糸膜による汚水処理方法は、水位変動する
生物反応処理槽により好気的または嫌気的に生物反応処
理をした生物フロックを含む混合液中に中空糸膜束を遊
動自由に充填し、該中空糸膜の内部を間欠的に吸引して
上記混合液を透過液と濃縮液に分離し、該磯縮液を上記
生物反応処理槽に返送する方法において、上記生物反応
処理槽の水位変動に関連させて上記間欠吸引の吸引・休
止時間を変化させ、透過流量を制御するようにしたこと
を特徴とするものである。[Means for Solving the Problems] The wastewater treatment method using hollow fiber membranes of the present invention is characterized in that a hollow fiber membrane is used in a mixed liquid containing biological flocs that has been subjected to aerobic or anaerobic biological reaction treatment using a biological reaction treatment tank in which the water level fluctuates. A method in which a fiber membrane bundle is filled with free movement, the inside of the hollow fiber membrane is intermittently suctioned to separate the mixed liquid into a permeated liquid and a concentrated liquid, and the condensed liquid is returned to the biological reaction treatment tank. The permeation flow rate is controlled by changing the suction/pause time of the intermittent suction in relation to the water level fluctuation of the biological reaction treatment tank.
［実施例Ｊ
以下、本発明の一実施例について図面を参照しながら説
明する。[Embodiment J] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図において、１は除砂装置、２はスクリーンであっ
て、原液中に混入している土砂等の固形物を除去するよ
うになっている。In FIG. 1, 1 is a sand removal device, and 2 is a screen, which removes solid matter such as earth and sand mixed into the raw solution.
３は可変容量型のバイオリアクタ（生物反応路Ｊ！Ｉ！
［＞であって、上記原液が流入管４を通して流入するよ
うになっている。本実施例では自然流下により供給する
ようになっているが、適宜ポンプ（図示せず）により供
給してもよい。3 is a variable capacity bioreactor (biological reaction path J!I!
[>, the above-mentioned stock solution flows in through the inflow pipe 4. In this embodiment, the water is supplied by gravity, but it may be supplied by a pump (not shown) as appropriate.
上記原液の流入量は時間的に変化し、そのために、該バ
イオリアクタ３内の生物フロックを含む混合液、即ち活
性汚泥混合液５の水位は上下（ＨＷＬ、ＬＷＬ）に変動
するようになっている。The inflow amount of the stock solution changes over time, and therefore the water level of the mixed liquid containing biological flocs in the bioreactor 3, that is, the activated sludge mixed liquid 5, fluctuates up and down (HWL, LWL). There is.
該バイオリアクタ３の底部には、散気管６が配設されて
いて、曝気プロワ−７から送気される空気を上記混合′
ｅ、５中に散気するようになっている。An aeration pipe 6 is installed at the bottom of the bioreactor 3 to mix the air supplied from the aeration blower 7.
e. It is designed to diffuse air during 5.
８は流出管であって、上記バイオリアクタ３の底部から
混合液をポンプ９により排出するようになっている。Reference numeral 8 denotes an outflow pipe for discharging the mixed liquid from the bottom of the bioreactor 3 using a pump 9.
該流出管８から排出される混合液は、途中、スクリーン
１０および除砂装置１１等によｒ）固形物を除去されて
固液分離槽１２に送られる。The mixed liquid discharged from the outflow pipe 8 is sent to a solid-liquid separation tank 12 after solids are removed by a screen 10, a sand removal device 11, etc. on the way.
上記固液分離槽１２内には多数の中空糸膜１３が束状に
自由に垂れ下がった状態で吊設されている。従って、該
中空糸膜１３は固液分＠Ｗｊ１２内を流下する水流によ
り［１２内で自由に拡がりながら遊動できるようになっ
ている。Inside the solid-liquid separation tank 12, a large number of hollow fiber membranes 13 are suspended in a freely hanging state in a bundle. Therefore, the hollow fiber membrane 13 can freely expand and move within the solid-liquid component @Wj12 due to the water flow flowing down inside the solid-liquid component @Wj12.
該中空糸膜１３は、例えば、０．１ミクロン程度の微細
な穴を無数に有するポリエチレン等の合成樹脂製の直径
０．８１程度の糸状中空管である。The hollow fiber membrane 13 is, for example, a filament-like hollow tube made of synthetic resin such as polyethylene and having a diameter of about 0.81 mm and having countless minute holes of about 0.1 micron.
中空糸膜１３はこれに限定するものではなく、これまで
使用または開発されている中空糸膜であればいずれのも
のでもよい。The hollow fiber membrane 13 is not limited to this, and may be any hollow fiber membrane that has been used or developed so far.
該中空糸膜１３の束の上端部は吸引室１４内に開口した
状態で固着されている。一方、中空糸膜１３の下端部は
蘭塞されている。尚、該中空糸膜１３をループ状に垂下
させて、その両端を吸引室１４で固着させてもよい、ま
た、該中空糸膜１３は横向き、或いは斜め等いずれの方
向に配向させてもよい。The upper end of the bundle of hollow fiber membranes 13 is fixed in a state where it opens into the suction chamber 14 . On the other hand, the lower end of the hollow fiber membrane 13 is plugged. Incidentally, the hollow fiber membrane 13 may be suspended in a loop shape, and both ends thereof may be fixed in the suction chamber 14, and the hollow fiber membrane 13 may be oriented in any direction, such as horizontally or diagonally. .
１５は返送管であって、固液分Ｂ槽１２内の濃ｊｌｉ！
液をバイオリアクタ３に返送するようになっている。Reference numeral 15 denotes a return pipe, which carries the concentrated liquid in the solid-liquid tank B 12.
The liquid is returned to the bioreactor 3.
１６は吸引装置であって、上記吸引室１４、すなわち中
空糸膜１３の内を吸引して低圧状態にすることにより、
固液分＃Ｉ槽１２内の混合液のうち固形分、微生物、ウ
ィルス等を除いた腹部分のみを中空糸膜１３の内部に透
水させて固液を分離するようになっている。Reference numeral 16 denotes a suction device which suctions the inside of the suction chamber 14, that is, the hollow fiber membrane 13 to bring it into a low pressure state.
Of the mixed liquid in the solid-liquid #I tank 12, only the belly portion excluding solids, microorganisms, viruses, etc. is allowed to permeate inside the hollow fiber membrane 13 to separate the solid and liquid.
１７は間欠タイマーであって、上記吸引装置１６による
稼動時間を適宜設定することにより、その吸引時間と休
止時間とを変化せしめるようになっている。Reference numeral 17 is an intermittent timer, and by appropriately setting the operation time of the suction device 16, the suction time and rest time are changed.
次に、上記実施例装置による処理方法を説明する。Next, a processing method using the apparatus of the above embodiment will be explained.
まず、有機汚水の原液から除砂装置１およびスクリーン
２により砂等の固形物を分離して流入管４からバイオリ
アクタ３内に導入する。原液が厨房排水のように油を含
む場合には、油分離処理をしてからバイオリアクタ３に
導入する。First, solids such as sand are separated from the raw organic wastewater using the sand removal device 1 and the screen 2 and introduced into the bioreactor 3 through the inlet pipe 4. If the stock solution contains oil, such as kitchen wastewater, it is introduced into the bioreactor 3 after being subjected to oil separation treatment.
バイオリアクタ３内に導入された有機性汚水は活性汚泥
混合液５となる。その水位は、上記流入管４からの流入
量および流出管８からの流出量の変化に応じてバイオリ
アクタ３内を上下に変動する。The organic wastewater introduced into the bioreactor 3 becomes an activated sludge mixture 5. The water level fluctuates up and down within the bioreactor 3 according to changes in the amount of inflow from the inflow pipe 4 and the amount of outflow from the outflow pipe 8.
バイオリアクタ３の底部には散気管６が配置されていて
、曝気ブロワ−７から空気が供給されるので、バイオリ
アクタ３内に流入した汚水中の有機物は、好気性微生物
フロックに吸着され、さらに酸化分解されて浄化される
。An aeration pipe 6 is placed at the bottom of the bioreactor 3, and air is supplied from an aeration blower 7, so organic matter in the wastewater that has flowed into the bioreactor 3 is adsorbed by aerobic microbial flocs, and further It is oxidized and decomposed and purified.
活性汚泥を含んだ処理水はポンプ９により流出管８から
固液分ＢＰａ１２に送られる。The treated water containing activated sludge is sent from the outflow pipe 8 to the solid-liquid portion BPa12 by the pump 9.
固液分Ｓ槽１２内に流入した汚水は中空糸膜１３の微細
な穴を通って吸引室１４に吸引され、その透過液は、送
水管１８から処理水として引き抜かれる。The wastewater that has flowed into the solid-liquid S tank 12 is sucked into the suction chamber 14 through the fine holes in the hollow fiber membrane 13, and the permeate is drawn out from the water pipe 18 as treated water.
中空糸膜１３により吸引されない濃縮液は、返送Ｗ１５
を通ってバイオリアクタ３に戻される。The concentrated liquid that is not sucked by the hollow fiber membrane 13 is returned to W15.
is returned to the bioreactor 3 through the
上記吸引装置１６は間欠タイマー１７により断続的に稼
動して、上記透過流量を制御するようになっている。尚
、上記間欠タイマー１７はコンピュータによりコントロ
ールするとよい。The suction device 16 is operated intermittently by an intermittent timer 17 to control the permeation flow rate. Incidentally, the intermittent timer 17 is preferably controlled by a computer.
１５２図は本発明の別の実施例を示すもので、中空糸膜
１３をバイオリアクタ３内に充填して装置全体をコンパ
クトに構成している。FIG. 152 shows another embodiment of the present invention, in which hollow fiber membranes 13 are filled in the bioreactor 3 to make the entire device compact.
上記実施例はいずれも、好気性のバイオリアクタでの処
理について説明したが、本発明はこれに限定するもので
はなく、嫌気性のバイオリアクタであってもよい、この
場合、バイオリアクタは蓋をし、〃ス抽集と加温が必要
である。Although the above embodiments have all described treatments in an aerobic bioreactor, the present invention is not limited thereto, and may also be an anaerobic bioreactor. In this case, the bioreactor is However, extraction and heating are necessary.
［発明の効果］
１、中空糸膜の内部の吸引および休止を繰り返すことに
より、中空糸膜の表面にデル層が付着して圧密化するの
が防止されるので、膜の表層流によりゲル層が剥離され
、長期間に互って運転を効率的に継続することができる
。[Effects of the invention] 1. By repeating suction and pause inside the hollow fiber membrane, the gel layer is prevented from adhering to the surface of the hollow fiber membrane and becoming compacted. are separated, allowing efficient operation to continue for a long period of time.
２、生物反応処理槽の水位変動に関連させて吸弓時間や
休止時間を適宜変化させることにより、処理流量を制御
することができるので、施設の規模や処理量変化に柔軟
に対処することができ、省エネルギーとなる。2. The treatment flow rate can be controlled by appropriately changing the bow suction time and rest time in relation to water level fluctuations in the biological reaction treatment tank, so it is possible to flexibly deal with changes in facility size and treatment amount. It is possible to save energy.
３、本発明は、下水処理施設、゛産業排水処理施設、排
水再利用施設および既設処理設備の改造等に適用するこ
とができる。3. The present invention can be applied to sewage treatment facilities, industrial wastewater treatment facilities, wastewater reuse facilities, and modification of existing treatment facilities.
第１図は本発明の一実施例を示する汚水処理システムの
７０−図、第２図は別の実施例を示すフロー図である。
１・・・除砂装置、２・・・スクリーン、３・・・バイ
オリアクタ、４・・・流入管、５・・・活性汚泥混合液
、６・・・散気管、７・・・曝気ブロワ−１８・・・流
出管、９・・・ポンプ、１０・・・スクリーン、１１・
・・除砂装置、１２・・・固液分ａ槽、１３・・・中空
糸膜、１４・・・吸引室、１５・・・返送管、１６・・
・吸引装置、１７・・・間欠タイマー、１８・・・送水
管。FIG. 1 is a 70-diagram of a sewage treatment system showing one embodiment of the present invention, and FIG. 2 is a flow diagram showing another embodiment. 1... Sand removal device, 2... Screen, 3... Bioreactor, 4... Inflow pipe, 5... Activated sludge mixture, 6... Aeration pipe, 7... Aeration blower -18...Outflow pipe, 9...Pump, 10...Screen, 11...
...Sand removal device, 12...Solid-liquid separation a tank, 13...Hollow fiber membrane, 14...Suction chamber, 15...Return pipe, 16...
- Suction device, 17... Intermittent timer, 18... Water pipe.
Claims (1)
した生物フロックを含む混合液中に中空糸膜束を遊動自
由に充填し、該中空糸膜の内部を間欠的に吸引して上記
混合液を透過液と濃縮液に分離し、該濃縮液を上記生物
反応処理槽に返送する方法において、上記生物反応処理
槽の水位変動に関連させて上記間欠吸引の吸引・休止時
間を変化させ、透過流量を制御するようにしたことを特
徴とする中空糸膜による汚水処理方法。 ２、上記生物反応処理を好気的に行うことを特徴とする
請求項１に記載の中空糸膜による汚水処理方法。 ３、上記生物反応処理を嫌気的に行うことを特徴とする
請求項１に記載の中空糸膜による汚水処理方法。[Claims] 1. A hollow fiber membrane bundle is filled freely in a mixed liquid containing biological flocs subjected to biological reaction treatment in a biological reaction treatment tank whose water level fluctuates, and the inside of the hollow fiber membrane is intermittently In the method of separating the mixed liquid into a permeated liquid and a concentrated liquid by suction, and returning the concentrated liquid to the biological reaction treatment tank, the intermittent suction is stopped in relation to the water level fluctuation of the biological reaction treatment tank. A sewage treatment method using a hollow fiber membrane, characterized by changing the time and controlling the permeation flow rate. 2. The sewage treatment method using a hollow fiber membrane according to claim 1, wherein the biological reaction treatment is carried out aerobically. 3. The sewage treatment method using a hollow fiber membrane according to claim 1, wherein the biological reaction treatment is performed anaerobically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1091629A JPH02268889A (en) | 1989-04-11 | 1989-04-11 | Treatment of sewage by hollow-fiber membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1091629A JPH02268889A (en) | 1989-04-11 | 1989-04-11 | Treatment of sewage by hollow-fiber membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02268889A true JPH02268889A (en) | 1990-11-02 |
Family
ID=14031843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1091629A Pending JPH02268889A (en) | 1989-04-11 | 1989-04-11 | Treatment of sewage by hollow-fiber membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02268889A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04190889A (en) * | 1990-11-22 | 1992-07-09 | Kubota Corp | Operation method for sewage treating device |
| WO1996038386A1 (en) * | 1995-05-24 | 1996-12-05 | Unisearch Ltd. | Concentration technique |
| US5645616A (en) * | 1994-02-24 | 1997-07-08 | The Babcock & Wilcox Company | Black liquor gasifier |
| JP2006007220A (en) * | 2005-09-16 | 2006-01-12 | Toshiba Corp | Anaerobic water treatment apparatus |
| CN102730825A (en) * | 2012-06-20 | 2012-10-17 | 太平洋水处理工程有限公司 | Improved CAST equipment and process adopting immersed hollow fiber ultrafiltration membrane |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61227195A (en) * | 1985-04-01 | 1986-10-09 | Nissan Motor Co Ltd | Ultrafilter device |
| JPS62181772A (en) * | 1986-02-05 | 1987-08-10 | Kurita Water Ind Ltd | Bioreactor |
-
1989
- 1989-04-11 JP JP1091629A patent/JPH02268889A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61227195A (en) * | 1985-04-01 | 1986-10-09 | Nissan Motor Co Ltd | Ultrafilter device |
| JPS62181772A (en) * | 1986-02-05 | 1987-08-10 | Kurita Water Ind Ltd | Bioreactor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04190889A (en) * | 1990-11-22 | 1992-07-09 | Kubota Corp | Operation method for sewage treating device |
| US5645616A (en) * | 1994-02-24 | 1997-07-08 | The Babcock & Wilcox Company | Black liquor gasifier |
| ES2136477A1 (en) * | 1994-02-24 | 1999-11-16 | Mcdermott Technology Inc | Black liquor gasifier |
| WO1996038386A1 (en) * | 1995-05-24 | 1996-12-05 | Unisearch Ltd. | Concentration technique |
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