JPS602116B2 - Laundry wastewater treatment membrane cleaning method - Google Patents
Laundry wastewater treatment membrane cleaning methodInfo
- Publication number
- JPS602116B2 JPS602116B2 JP12439577A JP12439577A JPS602116B2 JP S602116 B2 JPS602116 B2 JP S602116B2 JP 12439577 A JP12439577 A JP 12439577A JP 12439577 A JP12439577 A JP 12439577A JP S602116 B2 JPS602116 B2 JP S602116B2
- Authority
- JP
- Japan
- Prior art keywords
- laundry wastewater
- treatment membrane
- laundry
- membrane
- wastewater treatment
- 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
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Description
【発明の詳細な説明】
本発明は洗濯廃水処理膜洗浄方法に係り、特に処理水量
の増加が少なくて、しかも、洗浄効果を良好にするのに
好適な処理膜洗浄方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a membrane cleaning method for treating laundry wastewater, and particularly to a membrane cleaning method suitable for reducing the increase in the amount of treated water and improving the cleaning effect.
従来の中空式半透膜を洗濯廃水処理膜として用いている
洗濯廃水処理装置においては、洗濯廃水を循環処理中は
、処理膜内面に堆積する不純物および溶質をスポンジボ
ールを用いて除去洗浄し、洗濯廃水の濃縮完了後は、濃
縮された洗濯廃水を系外に排出し、その後直ちにスポン
ジポールで除去できなかった処理膜内面の溶質（洗剤）
を高流速の清水で洗浄するようにしていた。しかし、こ
のように清水のみで洗浄すると、この清水は処理膜内面
の溶質および系内に残留する濃縮された洗濯廃水で汚れ
るため、次回に処理すべき洗濯廃水に加えて処理せねば
ならず、処理すべき水量が洗浄に使用した清水の量だけ
増え、しかも、その量が多くなるという欠点がある。本
発明は上記に緩みつなされたものであって、その目的と
するところは、処理膜の洗浄に使用する清水の量を少な
くできる洗濯廃水処理膜洗浄方法を提供することにある
。In laundry wastewater treatment equipment that uses a conventional hollow semipermeable membrane as a laundry wastewater treatment membrane, during the circulation treatment of laundry wastewater, impurities and solutes that accumulate on the inner surface of the treatment membrane are removed and washed using sponge balls. After concentrating the laundry wastewater, drain the concentrated laundry wastewater out of the system, and immediately remove the solutes (detergent) on the inside of the treatment membrane that could not be removed with the sponge pole.
was washed with clean water at a high flow rate. However, when cleaning with only clean water, this clean water becomes contaminated with solutes on the inner surface of the treatment membrane and concentrated laundry wastewater remaining in the system, so it must be treated in addition to the laundry wastewater to be treated next time. The disadvantage is that the amount of water to be treated increases by the amount of clean water used for washing, and the amount of water increases. The present invention is loosely connected to the above, and its object is to provide a laundry wastewater treatment membrane cleaning method that can reduce the amount of fresh water used for cleaning the treatment membrane.
本発明の特級は、洗濯廃水を循環処理中は従釆通り処理
膜の洗浄はスポンジボールを用いて行なうが、洗濯廃水
の濃縮完了後の処理膜の洗浄は、最初、次回に処理すべ
き洗濯廃水で予備洗浄を行ない、次に少量の清水を用い
て仕上げ洗浄を行なうようにした点にある。The special feature of the present invention is that during the circulation treatment of laundry wastewater, the cleaning of the treatment membrane is carried out using a sponge ball, but after the completion of concentrating the laundry wastewater, the treatment membrane is cleaned first and then after washing the laundry to be treated next time. The main feature is that preliminary cleaning is performed with waste water, and then final cleaning is performed using a small amount of clean water.
以下本発明を図に示した実施例を用いて詳細に説明する
。The present invention will be explained in detail below using examples shown in the drawings.
図は本発明の洗濯廃水処理膜洗浄方法を説明するための
洗濯廃水処理装置の系統図で、図において、１は洗濯廃
水収集タンクで、洗濯廃水は収集タンク１に集められ、
まず、移送ポンプ２を用いて低圧で配管３、切換弁４、
中空式半透膜よりなる洗濯廃水処理膜５、配管６および
切換弁７を経て循環タンク８に送られる。The figure is a system diagram of a laundry wastewater treatment device for explaining the laundry wastewater treatment membrane cleaning method of the present invention. In the figure, 1 is a laundry wastewater collection tank, and laundry wastewater is collected in the collection tank 1.
First, using the transfer pump 2, the piping 3, the switching valve 4,
The wastewater is sent to a circulation tank 8 through a laundry wastewater treatment membrane 5 made of a hollow semipermeable membrane, piping 6, and a switching valve 7.
次に、高圧循環ポンプ９を運転し、循環タンク８内の洗
濯廃水を高圧で配管１０、高圧循環ポンプ９、切換弁１
１、処理膜５、圧力調整弁１２、配管１３を経て循環さ
せる。このとき、圧力調整弁１２によって洗濯廃水の圧
力は規定の圧力に保持され、洗濯廃水が処理膜５を通過
するときに処理膜５の浸透作用によって処理されて処理
膜５を透過した水は排水され、残りの洗濯廃水は徐々に
濃縮される。この洗濯廃水を循環する濃縮運転中に処理
膜５の内面に堆積した不純物および溶質（洗剤）は、ス
ポンジボール洗浄装置１４を作動させることによって除
去洗浄し、処理膜５よりの透過水量が極端に減少しない
ようにする。その後洗濯廃水が所定の濃縮度に到達した
ら、高圧循環ポンプ９を止め、切換弁１５を開いて、濃
縮された洗濯廃水を配管１６を経て自重落下させ、濃縮
廃水受けタンク１７に受ける。次の段階で処理膜５をさ
らに洗浄しなければならないが、本発明においては、そ
れを次のようにして行なう。Next, the high-pressure circulation pump 9 is operated, and the laundry wastewater in the circulation tank 8 is transferred to the piping 10, the high-pressure circulation pump 9, and the switching valve 1.
1. Circulate through the treatment membrane 5, pressure regulating valve 12, and piping 13. At this time, the pressure of the laundry wastewater is maintained at a specified pressure by the pressure regulating valve 12, and when the laundry wastewater passes through the treatment membrane 5, it is treated by the osmotic action of the treatment membrane 5 and the water that has permeated through the treatment membrane 5 is drained. The remaining laundry wastewater is gradually concentrated. Impurities and solutes (detergent) deposited on the inner surface of the treatment membrane 5 during the concentration operation of circulating this laundry wastewater are removed and washed by operating the sponge ball cleaning device 14, and the amount of water permeated through the treatment membrane 5 is extremely reduced. prevent it from decreasing. Thereafter, when the laundry wastewater reaches a predetermined concentration level, the high-pressure circulation pump 9 is stopped, the switching valve 15 is opened, and the concentrated laundry wastewater is allowed to fall under its own weight through the pipe 16 and is received in the concentrated wastewater receiving tank 17. In the next step, the treated membrane 5 must be further cleaned, and in the present invention, this is done as follows.
まず、移送ポンプ２を運転し、次に処理すべき洗濯廃水
収集タンク１内の洗濯廃水を処理膜５の浸透圧以下の圧
力で処理膜５に流し、さらに、配管６、切襖弁７を経て
循環タンク８に移送するようにして、この間に処理膜５
の内面を予備洗浄する。この移送量が規定値に達したら
、移送ポンプ２を止め、次に、清水ポンプ１８を低圧で
運転し、清水タンク１９の清水を配管２０、切換弁２１
を経て処理膜５に浸透圧以下の圧力で流し、系内に残留
していた次に処理すべき洗濯廃水を配管６、功換弁７を
経て循環タンク８に押し出し、清水に置換するとともに
処理膜５の内面を仕上洗浄する。系内が清水に置換され
たら、切換弁７を閉じ、切換弁２２を開いて清水を清水
タンク１９に戻すとともに清水ポンプ２０を止める。次
に最初の工程に移る。このときに循環タンク８に移送さ
れる潜水の量は、あらかじめ処理膜５の内面が次に処理
する洗濯廃水で予備洗浄されているので、少量で済み、
次に処理すべき洗濯廃水の清水の混入による増量が僅か
となり、また、処理膜５の洗浄効果を良好にすることが
できる。以上説明したように、本発明によれば、処理膜
の洗浄に使用する清水の量を少なくでき、潜水の混入に
する洗濯廃水の増量を少なくできるとともに、処理膜の
洗浄を十分に行なうことができるという顕著な効果があ
る。First, the transfer pump 2 is operated, and then the laundry wastewater in the laundry wastewater collection tank 1 to be treated is passed through the treatment membrane 5 at a pressure lower than the osmotic pressure of the treatment membrane 5, and then the piping 6 and the valve 7 are connected. During this time, the treated membrane 5 is transferred to the circulation tank 8.
Preliminarily clean the inner surface of the When this transfer amount reaches a specified value, the transfer pump 2 is stopped, and then the fresh water pump 18 is operated at low pressure to transfer fresh water from the fresh water tank 19 to the piping 20 and the switching valve 21.
through the treatment membrane 5 at a pressure below osmotic pressure, and the laundry wastewater that remained in the system to be treated next is pushed out through the piping 6 and the conversion valve 7 to the circulation tank 8, where it is replaced with fresh water and passed through the treatment membrane. Finish cleaning the inner surface of step 5. When the inside of the system is replaced with fresh water, the switching valve 7 is closed, the switching valve 22 is opened, the fresh water is returned to the fresh water tank 19, and the fresh water pump 20 is stopped. Next, move on to the first process. The amount of submerged water transferred to the circulation tank 8 at this time is small because the inner surface of the treatment membrane 5 has been pre-washed with the laundry wastewater to be treated next.
The amount of laundry wastewater to be treated next due to mixing with clean water is small, and the cleaning effect of the treatment membrane 5 can be improved. As explained above, according to the present invention, it is possible to reduce the amount of clean water used for cleaning the treatment membrane, reduce the increase in the amount of laundry waste water that becomes contaminated with water, and to thoroughly clean the treatment membrane. There is a remarkable effect that it can be done.
図は本発明の洗濯廃水処理膜洗浄方法を説明するための
洗濯廃水処理装置の系統図である。
１……洗濯廃水収集タンク、２…・・・移送ポンプ、４
，７，１１，１５，２１，２２…・・・切換弁、５・・
・・・・洗濯廃水処理膜、８・・・・・・循環タンク、
９・・…・高圧循環ポンプ、１２・・・・・・圧力調整
弁、１４・・・・・・スポンジポール洗浄装置、１８・
・・・・・清水ポンプ、１９・・・・・・清水タンク。The figure is a system diagram of a laundry wastewater treatment apparatus for explaining the laundry wastewater treatment membrane cleaning method of the present invention. 1...Laundry wastewater collection tank, 2...Transfer pump, 4
, 7, 11, 15, 21, 22... switching valve, 5...
...Laundry wastewater treatment membrane, 8...Circulation tank,
9... High pressure circulation pump, 12... Pressure regulating valve, 14... Sponge pole cleaning device, 18...
... Fresh water pump, 19... Fresh water tank.
Claims (1)
了後洗浄するときに、最初処理すべき洗濯廃水で予備洗
浄し、次に清水で仕上洗浄するようにすることを特徴と
する洗濯廃水処理膜洗浄方法。1. Laundry wastewater treatment characterized in that when cleaning the wastewater treatment membrane of the laundry wastewater treatment device after the completion of concentrating the laundry wastewater, it is first pre-washed with the laundry wastewater to be treated and then finished washed with clean water. Membrane cleaning method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12439577A JPS602116B2 (en) | 1977-10-19 | 1977-10-19 | Laundry wastewater treatment membrane cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12439577A JPS602116B2 (en) | 1977-10-19 | 1977-10-19 | Laundry wastewater treatment membrane cleaning method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5458944A JPS5458944A (en) | 1979-05-12 |
| JPS602116B2 true JPS602116B2 (en) | 1985-01-19 |
Family
ID=14884357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12439577A Expired JPS602116B2 (en) | 1977-10-19 | 1977-10-19 | Laundry wastewater treatment membrane cleaning method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS602116B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2666245B1 (en) * | 1990-08-31 | 1992-10-23 | Lyonnaise Eaux | METHOD FOR CONTROLLING THE OPERATING MODES OF AN AUTOMATIC WATER FILTRATION APPARATUS ON TUBULAR MEMBRANES. |
| JP3249093B2 (en) * | 1999-01-18 | 2002-01-21 | 三菱レイヨン株式会社 | Cleaning method for hollow fiber membrane module |
-
1977
- 1977-10-19 JP JP12439577A patent/JPS602116B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5458944A (en) | 1979-05-12 |
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