CN104056554B - A kind of MBR on-line cleaning method - Google Patents
A kind of MBR on-line cleaning method Download PDFInfo
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- CN104056554B CN104056554B CN201410024529.7A CN201410024529A CN104056554B CN 104056554 B CN104056554 B CN 104056554B CN 201410024529 A CN201410024529 A CN 201410024529A CN 104056554 B CN104056554 B CN 104056554B
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Abstract
The invention discloses a kind of MBR on-line cleaning method, clean by the mode of a pickling, mixed liquor alkali cleaning and white picking, coordinate and enter fast medicine and enter at a slow speed the mode that medicine combines and implement. The present invention is applicable to the on-line cleaning of built-in MBR, and simple operation has reduced the use amount of medicament greatly, has improved the utilization rate of medicament, has shortened scavenging period, has reduced labour intensity, safe, and the normal operation of system is only had to slight impact.
Description
Technical field
The present invention relates to technical field of sewage, particularly a kind of MBR on-line cleaning method.
Background technology
Membrane bioreactor group technology (MembraneBioreactor, MBR) technology is to utilize biological respinse to combine with membrane separation technique, utilize film to substitute conventional gravitational settling Separation of Solid and Liquid as separating medium and obtain water outlet, and can change the sewage water treatment method of reaction process and raising reaction efficiency. Membrane bioreactor is the basic unit for treating water being assembled into by membrane module, distribution device, captation, framework etc., is placed in biological reaction pool, carries out the device of Separation of Solid and Liquid. MBR(membrane bioreactor) be a kind of advanced person's sewage disposal technology, separate and replaced second pond in traditional water technology with film, have that technological process is simple, effluent quality good, the features such as floor space is little, microorganism concn is high, anti impulsion load. Current MBR technology is mainly divided into two kinds, one is submerged membrane bioreactor (built-in), refer to that membrane module is immersed in biological reaction pool, pollutant carries out biochemical reaction at biological reaction pool, utilize film to carry out equipment or the system of Separation of Solid and Liquid, can adopt negative pressure to produce water, also can utilize hydrostatic pressure from miscarriage water; Another kind be external membrane bioreactor refer to membrane module and biological reaction pool arranged apart, active sludge intermixture in biological reaction pool pumps into membrane module carries out the system of Separation of Solid and Liquid, and the concentrated mud mixture of this system is back to biological reaction pool and forms circulation. Submerged membrane bioreactor (built-in) is although to compare external membrane bioreactor operation energy consumption low, and good stability exists the problem of clean and maintenance trouble.
So the film of MBR membrane module in running pollutes and caused the decline of membrane flux fast, needed membrane area increases, thereby causes increase of investment. Membrane pollution problem is to hinder the widely used bottleneck problem of MBR technology. In actual moving process, the extensive work in daily operation management is all that MBR assembly is carried out to various types of cleanings.
Current cleaning way mainly contains on-line cleaning and off-line cleans two kinds of modes, all needs to use chemical agent. Membrane module is lifted out to reaction tank and carry out off-line cleaning, increased labour intensity. Also have the manual formula of workman to clean, waste time and energy especially. And existing on-line cleaning mode exists medicament use amount large, medicament utilization rate is low, and scavenging period is long, and flux recovery DeGrain, to defects such as the normal influence on system operation of system are large.
Summary of the invention
The object of the invention is to a kind of on-line cleaning method for built-in MBR, reduced greatly the use amount of medicament, improved the utilization rate of medicament, shorten scavenging period, reduce labour intensity, safe, the normal operation of system is only had to slight impact.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of MBR on-line cleaning method, comprises the steps:
1, a pickling
1.1 empty membrane cisterna: by emptying to sewage in membrane cisterna and mud, film silk is rinsed with clear water, by mud is emptying after rinsing well to mud and impurity on film silk;
A pickle of 1.2 configurations: add HCL to be mixed with pickle one time in the clear water of cleaning water tank;
1.3 enter medicine fast: open scavenging pump, control clean flow be 2-5 ton/hour, film silk is washed away with a pickle, ensure that a pickle is full of film silk;
1.4 entered at a slow speed after medicine: 2-5 minute, control clean flow be 1-3 ton/hour, film silk is washed away with a pickle, until a pickle has been beaten; Allow a pickle fully react with film silk inorganic pollution;
1.5 medicament reactions: beaten after a pickle, reaction 5-15 divides, and then with clear water, film silk is rinsed well;
2, mixed liquor alkali cleaning
2.1 configuration alkali wash waters: add NaOH and NaClO to be mixed with alkali wash water in the clear water of cleaning water tank;
2.2 enter medicine fast: open scavenging pump, control clean flow be 2-5 ton/hour, film silk is washed away with alkali wash water, ensure that alkali wash water is full of film silk;
2.3 entered at a slow speed after medicine: 2-5 minute, control clean flow be 1-3 ton/hour, film silk is washed away with alkali wash water, until alkali wash water has been beaten; Allow alkali wash water fully react with film silk organic pollution;
2.4 medicament reactions: beaten after alkali wash water, reaction 10-20 divides, and then with clear water, film silk is rinsed well;
3, white picking
3.1 configuration quadratic acid washing lotions: add HCL to be mixed with quadratic acid washing lotion in the clear water of cleaning water tank;
3.2 enter medicine fast: open scavenging pump, control clean flow be 2-5 ton/hour, film silk is rinsed by quadratic acid washing lotion;
3.3 entered at a slow speed after medicine: 2-5 minute, control clean flow be 1-3 ton/hour, film silk is rinsed by quadratic acid washing lotion, until quadratic acid washing lotion has been beaten; After allowing quadratic acid washing lotion with the alkali cleaning of film silk, residual inorganic pollution thoroughly reacts;
3.4 medicament reactions: beaten after quadratic acid washing lotion, reaction 5-10 divides, and then with clear water, film silk is rinsed well;
4, normally operation
White picking is complete, and system is entered sewage again, enters normal operation.
By a pickling, for cleaning out the inorganic pollution on film silk, then alkali cleaning, for cleaning out the organic pollution on film silk, the object of white picking be avoid inorganic pollution that a pickling thoroughly do not clean up in the process of alkali cleaning again fouling be attached on film silk, cause flux recovery not thorough. The present invention has taked to enter fast medicine and the mode of entering at a slow speed medicine in the time of a pickling, alkali cleaning and white picking, can allow rapidly every film silk be full of medicament by entering fast medicine, transfer at a slow speed thereupon, can fully allow film silk pollutant react with medicament, avoid medicament to run off. Both can allow every film silk with the abundant haptoreaction of medicament by conversion, flux recovery rate is high, can farthest save again medicament.
As preferably, configure a pickle and be specially: in the 500L clear water of cleaning water tank, add the HCL of clear water weight 1-2% to be mixed with pickle one time.
As preferably, configure alkali wash water and be specially: in the 500L clear water of cleaning water tank, add the NaOH of clear water weight 0.5-1.5% and the NaClO of 0.2-0.5% to be mixed with alkali wash water.
As preferably, configure quadratic acid washing lotion and be specially: in the 500L clear water of cleaning water tank, add the HCL of clear water weight 0.1-0.5% to be mixed with quadratic acid washing lotion.
As preferably, described membrane cisterna is independent setting in biological reaction pool, and membrane cisterna and biological reaction pool separate by dividing plate, has into water through hole on dividing plate, and the valve of its keying of control is housed on water inlet through hole. Membrane cisterna is independent setting in biological reaction pool, thereby built-in membrane system is separated with biochemical system, and membrane cisterna is convenient to rapid emptying, carries out cleaning operation, greatly saves dosing and scavenging period.
Conventional built-in MBR is placed on membrane module in biological reaction pool, with biological reaction pool intercommunication, need to be by emptying whole biological reaction pool while cleaning like this, just can add the medicament of cleaning, medicament use amount is large, time is longer, the present invention is separated out separately a region in biological reaction pool becomes membrane cisterna, MBR membrane module position in the inner, membrane cisterna is communicated with by the water inlet through hole with valve with biological reaction pool, just can control entering of sewage by valve opening and closing, without need to get to membrane module by pump as external MBR, blowback is next again, energy consumption is high like this, in the time of on-line cleaning, as long as the present invention is valve-off, cut off entering of sewage, the just sewage in energy fast evacuation membrane cisterna, mud, carry out cleaning operation, because membrane cisterna takes up an area little at whole biological reaction pool, separate with biological reaction pool again, work to biological reaction pool when cleaning is not much affected, finish to open valve as long as clean, automatically enter sewage, normal work.
The invention has the beneficial effects as follows: be applicable to the on-line cleaning of built-in MBR, simple operation, has reduced the use amount of medicament greatly, the utilization rate that has improved medicament, has shortened scavenging period, has reduced labour intensity, safe, the normal operation of system is only had to slight impact.
Detailed description of the invention
Below by specific embodiment, technical scheme of the present invention is described in further detail.
In the present invention, if not refer in particular to, raw material and the equipment etc. adopting all can be buied from market or this area is conventional. Method in following embodiment, if no special instructions, is the conventional method of this area.
The present invention is following to be cleaned for existing built-in SUMITOMO CHEMICAL electrician PTFE membrane module.
Built-in MBR of the present invention, the delivery port side in conventional biological reaction pool arranges dividing plate, thereby has formed independently membrane cisterna, and MBR membrane module is all positioned at membrane cisterna, has into water through hole on dividing plate, and the valve of controlling its keying is housed on through hole. On dividing plate, driving water through hole into and filling valve is all conventional technological means, and therefore not to repeat here in the present invention.
Embodiment 1:
1, a pickling
1.1 empty membrane cisterna: by emptying to sewage in membrane cisterna and mud, film silk is rinsed with clear water, by mud is emptying after rinsing well to most of mud and impurity on film silk;
A pickle of 1.2 configurations: be metered into cleaning after adding the HCL(of clear water weight 1% to be converted by the hydrochloric acid solution of 30wt% in the 500L clear water of water tank) be mixed with pickle one time;
1.3 enter medicine fast: open scavenging pump, controlling and cleaning flow is 5 tons/hour, film silk is washed away with a pickle;
1.4 enter at a slow speed medicine: after 2 minutes, controlling and cleaning flow is 3 tons/hour, film silk is washed away with a pickle, makes medicament (pickle) be covered with whole film silk, fully contacts, until a pickle has been beaten with pollutant;
1.5 medicament reactions: beaten after a pickle, reacted 15 minutes, then with clear water, film silk has been rinsed well;
2, mixed liquor alkali cleaning
2.1 configuration alkali wash waters: be metered into cleaning after adding the NaOH(of clear water weight 0.5% to be converted by the sodium hydroxide solution of 30wt% in the 500L clear water of water tank) and 0.2% NaClO(be metered into after being converted by the liquor natrii hypochloritis of 10wt%) be mixed with alkali wash water;
2.2 enter medicine fast: open scavenging pump, controlling and cleaning flow is 5 tons/hour, film silk is washed away with alkali wash water;
2.3 enter at a slow speed medicine: after 2 minutes, controlling and cleaning flow is 3 tons/hour, film silk is washed away with alkali wash water, makes medicament (alkali wash water) be covered with whole film silk, fully contacts, until alkali wash water has been beaten with pollutant;
2.4 medicament reactions: beaten after alkali wash water, reacted 20 minutes, then with clear water, film silk has been rinsed well;
3, white picking
3.1 configuration quadratic acid washing lotions: add the HCL of clear water weight 0.1% to be mixed with quadratic acid washing lotion in the 500L clear water of cleaning water tank;
3.2 enter medicine fast: open scavenging pump, controlling and cleaning flow is 5 tons/hour, film silk is washed away by quadratic acid washing lotion;
3.3 enter at a slow speed medicine: after 2 minutes, controlling and cleaning flow is 3 tons/hour, by quadratic acid washing lotion, film silk is washed away, and makes medicament (quadratic acid washing lotion) be covered with whole film silk, fully contacts, until quadratic acid washing lotion has been beaten with pollutant;
3.4 medicament reactions: beaten after quadratic acid washing lotion, reacted 10 minutes, then with clear water, film silk has been rinsed well;
4, normally operation
White picking is complete, and system is entered sewage again, enters normal operation.
Embodiment 2:
1, a pickling
1.1 empty membrane cisterna: by emptying to sewage in membrane cisterna and mud, film silk is rinsed with clear water, by mud is emptying after rinsing well to most of mud and impurity on film silk;
A pickle of 1.2 configurations: be metered into cleaning after adding the HCL(of clear water weight 2% to be converted by the hydrochloric acid solution of 30wt% in the 500L clear water of water tank) be mixed with pickle one time;
1.3 enter medicine fast: open scavenging pump, controlling and cleaning flow is 2 tons/hour, film silk is washed away with a pickle;
1.4 enter at a slow speed medicine: after 5 minutes, controlling and cleaning flow is 1 ton/hour, film silk is washed away with a pickle, makes medicament (pickle) be covered with whole film silk, fully contacts, until a pickle has been beaten with pollutant;
1.5 medicament reactions: beaten after a pickle, reacted 5 minutes, then with clear water, film silk has been rinsed well;
2, mixed liquor alkali cleaning
2.1 configuration alkali wash waters: be metered into cleaning after adding the NaOH(of clear water weight 1.5% to be converted by the sodium hydroxide solution of 30wt% in the 500L clear water of water tank) and 0.5% NaClO(be metered into after being converted by the liquor natrii hypochloritis of 10wt%) be mixed with alkali wash water;
2.2 enter medicine fast: open scavenging pump, controlling and cleaning flow is 2 tons/hour, film silk is washed away with alkali wash water;
2.3 enter at a slow speed medicine: after 5 minutes, controlling and cleaning flow is 1 ton/hour, film silk is washed away with alkali wash water, makes medicament (alkali wash water) be covered with whole film silk, fully contacts, until alkali wash water has been beaten with pollutant;
2.4 medicament reactions: beaten after alkali wash water, reacted 10 minutes, then with clear water, film silk has been rinsed well;
3, white picking
3.1 configuration quadratic acid washing lotions: add the HCL of clear water weight 0.5% to be mixed with quadratic acid washing lotion in the 500L clear water of cleaning water tank;
3.2 enter medicine fast: open scavenging pump, controlling and cleaning flow is 2 tons/hour, film silk is washed away by quadratic acid washing lotion;
3.3 enter at a slow speed medicine: after 5 minutes, controlling and cleaning flow is 1 ton/hour, by quadratic acid washing lotion, film silk is washed away, and makes medicament (quadratic acid washing lotion) be covered with whole film silk, fully contacts, until quadratic acid washing lotion has been beaten with pollutant;
3.4 medicament reactions: beaten after quadratic acid washing lotion, reacted 5 minutes, then with clear water, film silk has been rinsed well;
4, normally operation
White picking is complete, and system is entered sewage again, enters normal operation.
Embodiment 3:
1, a pickling
1.1 empty membrane cisterna: by emptying to sewage in membrane cisterna and mud, film silk is rinsed with clear water, by mud is emptying after rinsing well to most of mud and impurity on film silk;
A pickle of 1.2 configurations: be metered into cleaning after adding the HCL(of clear water weight 1.5% to be converted by the hydrochloric acid solution of 30wt% in the 500L clear water of water tank) be mixed with pickle one time;
1.3 enter medicine fast: open scavenging pump, controlling and cleaning flow is 3 tons/hour, film silk is washed away with a pickle;
1.4 enter at a slow speed medicine: after 3 minutes, controlling and cleaning flow is 2 tons/hour, film silk is washed away with a pickle, makes medicament (pickle) be covered with whole film silk, fully contacts, until a pickle has been beaten with pollutant;
1.5 medicament reactions: beaten after a pickle, reacted 10 minutes, then with clear water, film silk has been rinsed well;
2, mixed liquor alkali cleaning
2.1 configuration alkali wash waters: be metered into cleaning after adding the NaOH(of clear water weight 1% to be converted by the sodium hydroxide solution of 30wt% in the 500L clear water of water tank) and 0.3% NaClO(be metered into after being converted by the liquor natrii hypochloritis of 10wt%) be mixed with alkali wash water;
2.2 enter medicine fast: open scavenging pump, controlling and cleaning flow is 3 tons/hour, film silk is washed away with alkali wash water;
2.3 enter at a slow speed medicine: after 3 minutes, controlling and cleaning flow is 2 tons/hour, film silk is washed away with alkali wash water, makes medicament (alkali wash water) be covered with whole film silk, fully contacts, until alkali wash water has been beaten with pollutant;
2.4 medicament reactions: beaten after alkali wash water, reacted 15 minutes, then with clear water, film silk has been rinsed well;
3, white picking
3.1 configuration quadratic acid washing lotions: add the HCL of clear water weight 0.3% to be mixed with quadratic acid washing lotion in the 500L clear water of cleaning water tank;
3.2 enter medicine fast: open scavenging pump, controlling and cleaning flow is 3 tons/hour, film silk is washed away by quadratic acid washing lotion;
3.3 enter at a slow speed medicine: after 3 minutes, controlling and cleaning flow is 2 tons/hour, by quadratic acid washing lotion, film silk is washed away, and makes medicament (quadratic acid washing lotion) be covered with whole film silk, fully contacts, until quadratic acid washing lotion has been beaten with pollutant;
3.4 medicament reactions: beaten after quadratic acid washing lotion, reacted 8 minutes, then with clear water, film silk has been rinsed well;
4, normally operation
White picking is complete, and system is entered sewage again, enters normal operation.
Comparative example (conventional cleaning method)
1, pickling
1.1 empty membrane cisterna: by emptying to sewage in membrane cisterna and mud, film silk is rinsed with clear water, by mud is emptying after rinsing well to most of mud and impurity on film silk;
1.2 configuration pickles: be metered into cleaning after adding the HCL(of clear water weight 3% to be converted by the hydrochloric acid solution of 30wt% in the 500L clear water of water tank) be mixed with pickle;
1.3 pickling: soak after 3-6 hour with pickle in membrane cisterna, open sludge pump soak is fanned the air, then with clear water, film silk is rinsed well;
2, mixed liquor alkali cleaning
2.1 configuration alkali wash waters: be metered into cleaning after adding the NaOH(of clear water weight 4% to be converted by the sodium hydroxide solution of 30wt% in the 500L clear water of water tank), add NaClO simultaneously, NaClO consumption is to be metered into after 10000mg/L(is converted by the liquor natrii hypochloritis of 10wt%), be mixed with alkali wash water;
2.2 squeeze into alkali wash water, in membrane cisterna, soak 6 hours with alkali wash water, then with clear water, film silk are rinsed well;
3, normally operation
Alkali cleaning is complete, and system is entered sewage again, enters normal operation.
The effect of the present invention and comparative example relatively sees the following form.
The present invention is applicable to the on-line cleaning of built-in MBR, and simple operation has reduced the use amount of medicament greatly, has improved the utilization rate of medicament, has shortened scavenging period, has reduced labour intensity, safe, and the normal operation of system is only had to slight impact. Since processing the practice in nearly 2 years of MBR system by the multiple burning power plant percolates of Hangzhou Jinjiang Corporation, effect is very good.
Above-described embodiment is preferably scheme of one of the present invention, not the present invention is done to any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim records.
Claims (2)
1. a MBR on-line cleaning method, is characterized in that: comprise the steps:
1, a pickling
1.1 empty membrane cisterna: by emptying to sewage in membrane cisterna and mud, film silk is rinsed with clear water, by mud is emptying after rinsing well to mud and impurity on film silk;
A pickle of 1.2 configurations: add HCl to be mixed with pickle one time in the clear water of cleaning water tank;
1.3 enter medicine fast: open scavenging pump, control clean flow be 2-5 ton/hour, film silk is washed away with a pickle;
1.4 entered at a slow speed after medicine: 2-5 minute, control clean flow be 1-3 ton/hour, film silk is washed away with a pickle, until a pickle has been beaten;
1.5 medicament reactions: beaten after a pickle, reaction 5-15 divides, and then with clear water, film silk is rinsed well;
2, mixed liquor alkali cleaning
2.1 configuration alkali wash waters: add NaOH and NaClO to be mixed with alkali wash water in the clear water of cleaning water tank;
2.2 enter medicine fast: open scavenging pump, control clean flow be 2-5 ton/hour, film silk is washed away with alkali wash water;
2.3 entered at a slow speed after medicine: 2-5 minute, control clean flow be 1-3 ton/hour, film silk is washed away with alkali wash water, until alkali wash water has been beaten;
2.4 medicament reactions: beaten after alkali wash water, reaction 10-20 divides, and then with clear water, film silk is rinsed well;
3, white picking
3.1 configuration quadratic acid washing lotions: add HCl to be mixed with quadratic acid washing lotion in the clear water of cleaning water tank;
3.2 enter medicine fast: open scavenging pump, control clean flow be 2-5 ton/hour, film silk is rinsed by quadratic acid washing lotion;
3.3 entered at a slow speed after medicine: 2-5 minute, control clean flow be 1-3 ton/hour, film silk is rinsed by quadratic acid washing lotion, until quadratic acid washing lotion has been beaten;
3.4 medicament reactions: beaten after quadratic acid washing lotion, reaction 5-10 divides, and then with clear water, film silk is rinsed well;
4, normally operation
White picking is complete, and system is entered sewage again, enters normal operation;
Configuring a pickle is specially: in the 500L clear water of cleaning water tank, add the HCl of clear water weight 1-2% to be mixed with pickle one time; Configuration alkali wash water is specially: in the 500L clear water of cleaning water tank, add the NaOH of clear water weight 0.5-1.5% and the NaClO of 0.2-0.5% to be mixed with alkali wash water; Configuration quadratic acid washing lotion is specially: in the 500L clear water of cleaning water tank, add the HCl of clear water weight 0.1-0.5% to be mixed with quadratic acid washing lotion.
2. a kind of MBR on-line cleaning method according to claim 1, it is characterized in that: described membrane cisterna is independent setting in biological reaction pool, membrane cisterna and biological reaction pool separate by dividing plate, have into water through hole on dividing plate, on water inlet through hole, the valve of controlling its keying are housed.
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| CN105016550B (en) * | 2015-07-31 | 2017-06-06 | 浙江至美环境科技有限公司 | A kind of portable emergency water treatment facilities and handling process |
| CN107261854B (en) * | 2017-08-09 | 2020-09-15 | 广州环投环境服务有限公司 | Method for cleaning membrane in leachate treatment process |
| CN108483631A (en) * | 2018-03-27 | 2018-09-04 | 天津亿利科能源科技发展股份有限公司 | A kind of online medicament cleaning method suitable for sewage disposal MBR films |
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| CN1689984A (en) * | 2004-04-21 | 2005-11-02 | 中国科学院生态环境研究中心 | H circulation pipe separated type membrane bioreactor |
| CN1919750A (en) * | 2006-09-21 | 2007-02-28 | 深圳市金达莱环保股份有限公司 | Intelligent type mid-water reuse device and cleaning method thereof |
| CN101618925A (en) * | 2009-07-27 | 2010-01-06 | 北京汉青天朗水处理科技有限公司 | Sewage treatment device |
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| JP3290555B2 (en) * | 1995-03-31 | 2002-06-10 | 株式会社クボタ | Washing method of immersion type membrane cartridge in tank |
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| CN1689984A (en) * | 2004-04-21 | 2005-11-02 | 中国科学院生态环境研究中心 | H circulation pipe separated type membrane bioreactor |
| CN1919750A (en) * | 2006-09-21 | 2007-02-28 | 深圳市金达莱环保股份有限公司 | Intelligent type mid-water reuse device and cleaning method thereof |
| CN101618925A (en) * | 2009-07-27 | 2010-01-06 | 北京汉青天朗水处理科技有限公司 | Sewage treatment device |
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