CN101229938B - Method for controlling or alleviating membrane pollution of membrane bioreactor by regulating operation condition - Google Patents
Method for controlling or alleviating membrane pollution of membrane bioreactor by regulating operation condition Download PDFInfo
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- CN101229938B CN101229938B CN2008100638407A CN200810063840A CN101229938B CN 101229938 B CN101229938 B CN 101229938B CN 2008100638407 A CN2008100638407 A CN 2008100638407A CN 200810063840 A CN200810063840 A CN 200810063840A CN 101229938 B CN101229938 B CN 101229938B
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Abstract
The invention provides a method for adjusting the operation condition to control or mitigate pollution of the membrane bioreactor, which relates to a method for controlling or mitigating the membrane pollution, aiming at solving the problems that using the aerobic particle sludge inoculation to control the membrane pollution dose not conform to the initial purpose of inventing the membrane bioreactor which influences the utilization efficiency of the membrane bioreactor. In the aerobic membrane bioreactor, the invention ensures that the dissolved oxygen concentration is 3-4mg/L; the sludge concentration 8000-10000mg/L; the hydraulic retention time is 7-9 hours; the sludge retention time is 140-160d. Microorganism is added to the anaerobic membrane bioreactor, in which the sludge temperature is controlled to range from 20 to 30 DEG C and the pH value is controlled at 6.3-7.7. The invention controls from reducing the microorganism species of the secretion membrane pollutants. The reduction of the membrane flux of 100 days is 50 percent of the contraction and the times of membrane-clearing are reduced by 70 percent. Compared with the contraction, the invention saves the operation cost more than 70 percent, thus improving the sewage quantity of 150 Ld<-1>.
Description
Technical field
The present invention relates to a kind of method that membrane bioreactor generation film pollutes of controlling or slow down.
Background technology
Membrane bioreactor is with a kind of new and effective water technology of the high efficient separation technology be combined into of biological degradation and film, appears at the North America the earliest, is applied in Japan and Europe in succession subsequently, and late 1990s just enters China.This technology has that processing efficiency height, water outlet do not contain particulate matter, floor space is little and has remote monitoring and advantage such as control.Traditional activated sludge process adopts gravity settling basin to carry out mud-water separation, because operational management is improper, has sludge bulking and frothing often and takes place, and causes the mud-water separation difficulty, makes the water outlet water quality deterioration.On the contrary, be subjected to the influence of sludge bulking and generation frothing hardly in the sewage work that adopts membrane biological reactor process.Therefore, along with the worsening shortages of water resources, the reuse of sewage becomes more and more important, by the continuous development of membrane science research, rely on its exclusive advantage, membrane bioreactor (MBR) treatment technology will certainly obtain increasingly extensive application at aspects such as waste water treating and reutilizings.But in Membrane Bioreactor for Wastewater Treatment technology, membrane pollution problem has become " bottleneck " of this process application of restriction and development, because it directly causes the increase of this technology working cost.And the technology of current solution membrane pollution problem mainly be adopt ultrasonic wave, add chemical agent or cultivation, the inoculation aerobic particle mud pollutes to suppress film.This several method has played certain effect for alleviating the film pollution to a certain extent, but also all there are some problems in they.The subject matter that adopts the ultrasonic wave controlling diaphragm to pollute is that running cost is very high, and energy consumption is very big, is difficult to promote the use of; In addition, if the improper interior microbic activity of bio-reactor that also can influence of ultrasonic control reduces the removal efficient to pollutent.Adopt chemical agent, the subject matter of polluting as the coagulating agent controlling diaphragm is the running cost height, because this method needs outer adding medicine, has correspondingly improved the running cost of system; In addition, the medicament that is added has also brought secondary pollution to a certain extent, promptly has novel substance to be incorporated in the reactive system, though this method has been alleviated the film pollution, but has brought new problem.Though the inoculation aerobic particle mud suppresses the generation that method that film pollutes can decelerating membrane pollution, but this method does not also meet the idea of invention membrane bioreactor originally, if microorganism mainly exists with granule sludge in the reactor, these granule sludges are easy to carry out mud-water separation by natural subsidence, so, the advantage of membrane bioreactor itself just can not be fully played, and has also influenced the utilising efficiency of membrane bioreactor to a certain extent.
Summary of the invention
The objective of the invention is not meet the idea of invention membrane bioreactor originally for the method that solves the pollution of inoculation aerobic particle mud inhibition film, if microorganism mainly exists with granule sludge in the reactor, these granule sludges are easy to carry out mud-water separation by natural subsidence, so, the advantage of membrane bioreactor itself just can not be fully played, also influenced the problem of the utilising efficiency of membrane bioreactor to a certain extent, a kind of method that operational conditions reaches control or slows down membrane pollution of membrane bioreactor of adjusting is provided.Method of the present invention realizes by following steps: be 3～4mg/L at aerobic membrane bioreactor inner control dissolved oxygen concentration one,, sludge concentration is 8000～10000mg/L, hydraulic detention time is (HRT) 7～9 hours, and sludge retention time (SRT) is 140～160d; Two, add microorganism in anaerobic membrane bioreactor, the temperature of sewage is 20～30 ℃ in the control anaerobic membrane bioreactor, and the pH value is 6.3～7.7; The add-on of described microorganism is 10000～20000mg/L, and described microorganism mainly is facultative anaerobe and methanogen.
The present invention has following advantage: one, running cost is low, does not add any energy and is used for film pollution control, does not also need to add chemical agent; Two, the present invention is environmentally friendly technology, does not introduce novel substance and enters system, does not also just have the interference of novel substance to system; What three, controlling diaphragm polluted is effective, because this invention is to tackle key problems on the microbial molecular level, control from the microbial population that reduces the secretion membrane contaminant, and then control or decelerating membrane pollution.In addition, very stable aspect the film water outlet, it is very slow that membrane flux descends, compare with the contrast of not adopting control techniques, and membrane bioreactor stable, it is about 50% of contrast that 100 days membrane flux descends, the film wash number has reduced 70%.Compared with the control, the present invention saves running cost more than 70%, improves sewage load 150L.d
-1
Embodiment
Embodiment one: the method for present embodiment realizes by following steps: be 3～4mg/L at aerobic membrane bioreactor inner control dissolved oxygen concentration one,, sludge concentration is 8000～10000mg/L, hydraulic detention time is (HRT) 7～9 hours, and sludge retention time (SRT) is 140～160d; Two, add microorganism in anaerobic membrane bioreactor, the temperature of sewage is 20～30 ℃ in the control anaerobic membrane bioreactor, and the pH value is 6.3～7.7; The add-on of described microorganism is 8000～15000mg/L, and described microorganism mainly is facultative anaerobe and methanogen.
Embodiment two: be 3.5mg/L at aerobic membrane bioreactor inner control dissolved oxygen concentration in the step 1 of present embodiment.Other is identical with embodiment one.
Embodiment three: be 9000mg/L in aerobic membrane bioreactor inner control sludge concentration in the step 1 of present embodiment.Other is identical with embodiment one.
Embodiment four: in the step 1 of present embodiment in aerobic membrane bioreactor hydraulic detention time be (HRT) 8 hours.Other is identical with embodiment one.
Embodiment five: in the step 1 of present embodiment in aerobic membrane bioreactor sludge retention time (SRT) be 150d.Other is identical with embodiment one.
Embodiment six: the temperature of controlling sewage in the anaerobic membrane bioreactor in the step 2 of present embodiment is 25 ℃.Other is identical with embodiment one.
Embodiment seven: the pH value of controlling sewage in the anaerobic membrane bioreactor in the step 2 of present embodiment is 6.5.Other is identical with embodiment one.
Embodiment eight: the add-on of microorganism described in the step 2 of present embodiment is 10000mg/L, and other is identical with embodiment one.
Embodiment nine: the facultative anaerobe described in the step 2 of present embodiment is mainly fermenting bacteria and produces the hydrogen acetogen, and other is identical with embodiment one.
Embodiment ten: the methanogen described in the step 2 of present embodiment is mainly to be had a liking for the producing hydrogen and methane bacterium and has a liking for the acetic acid and methane producing bacterium, and other is identical with embodiment one.
Claims (10)
1. adjust the method that operational conditions reaches control or slows down membrane pollution of membrane bioreactor for one kind, it is characterized in that adjusting the method that operational conditions reaches control or slow down membrane pollution of membrane bioreactor realizes by following steps: be 3～4mg/L at aerobic membrane bioreactor inner control dissolved oxygen concentration one,, sludge concentration is 8000～10000mg/L, hydraulic detention time is 7～9 hours, and sludge retention time (SRT) is 140～160d; Two, add microorganism in anaerobic membrane bioreactor, the temperature of sewage is 20～30 ℃ in the control anaerobic membrane bioreactor, and the pH value is 6.3～7.7; The add-on of described microorganism is 8000～15000mg/L, and described microorganism mainly is facultative anaerobe and methanogen.
2. adjustment operational conditions according to claim 1 reaches the control or the method for slowing down membrane pollution of membrane bioreactor, it is characterized in that in the step 1 at aerobic membrane bioreactor inner control dissolved oxygen concentration being 3.5mg/L.
3. adjustment operational conditions according to claim 1 reaches the control or the method for slowing down membrane pollution of membrane bioreactor, it is characterized in that in the step 1 in aerobic membrane bioreactor inner control sludge concentration being 9000mg/L.
4. adjustment operational conditions according to claim 1 reaches the control or the method for slowing down membrane pollution of membrane bioreactor, it is characterized in that in the step 1 that hydraulic detention time is 8 hours in aerobic membrane bioreactor.
5. adjustment operational conditions according to claim 1 reaches the control or the method for slowing down membrane pollution of membrane bioreactor, it is characterized in that in the step 1 that sludge retention time is 150d in aerobic membrane bioreactor.
6. adjustment operational conditions according to claim 1 reaches the control or the method for slowing down membrane pollution of membrane bioreactor, it is characterized in that in the step 2 that the temperature of sewage is 25 ℃ in the control anaerobic membrane bioreactor.
7. adjustment operational conditions according to claim 1 reaches the control or the method for slowing down membrane pollution of membrane bioreactor, it is characterized in that in the step 2 that the pH value of sewage is 6.5 in the control anaerobic membrane bioreactor.
8. the method that adjustment operational conditions according to claim 1 reaches control or slows down membrane pollution of membrane bioreactor, the add-on that it is characterized in that microorganism described in the step 2 is 10000mg/L.
9. the method that adjustment operational conditions according to claim 1 reaches control or slows down membrane pollution of membrane bioreactor is characterized in that the facultative anaerobe described in the step 2 is mainly fermenting bacteria and produces the hydrogen acetogen.
10. adjustment operational conditions according to claim 1 reaches the control or the method for slowing down membrane pollution of membrane bioreactor, it is characterized in that the methanogen described in the step 2 is mainly to have a liking for the producing hydrogen and methane bacterium and have a liking for the acetic acid and methane producing bacterium.
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| CN2008100638407A CN101229938B (en) | 2008-01-11 | 2008-01-11 | Method for controlling or alleviating membrane pollution of membrane bioreactor by regulating operation condition |
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| CN101229938B true CN101229938B (en) | 2010-08-18 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| BR112012011129A2 (en) * | 2009-11-10 | 2017-06-20 | Novozymes Biologicals Inc | method for improving the permeability of a membrane used in a process, or the flow through a membrane used in a process, method for increasing the critical flow of a membrane used in a process, and method for producing or preventing fouling of a membrane. membrane used in a process. |
| CN102249484B (en) * | 2011-05-17 | 2013-05-08 | 东华大学 | Shunting type dual-system sludge decrement film bioreactor and using method thereof |
| CN103803706B (en) * | 2014-03-04 | 2016-01-27 | 重庆耐德机械设备有限公司 | A kind of based on membrane bioreactor sewage water treatment method |
| CN107381730B (en) * | 2017-09-04 | 2020-10-02 | 河海大学 | Method for slowing down membrane pollution in membrane capacitance deionization system |
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