CN115385515A - Treatment method of membrane-making wastewater - Google Patents
Treatment method of membrane-making wastewater Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46176—Galvanic cells
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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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
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Abstract
The invention discloses a treatment method of membrane-making wastewater, which comprises the following steps: s1, introducing the pretreated membrane-making wastewater into an anoxic part with bacteria for treatment; s2, introducing the membrane-making wastewater treated by the anoxic part into an integrated membrane biological reaction part provided with an MBR flat membrane module; s3, the mixed liquid in the integrated membrane biological reaction part is sent back to the anoxic part, and meanwhile, the membrane-making wastewater is discharged after the treatment of the integrated membrane biological reaction part reaches the standard. Compared with the common membrane preparation wastewater treatment method, the treatment method has the advantages that the biological reaction technology is adopted and the integrated membrane biological reaction part is combined, so that the plasma treatment technology which is expensive and not applied in a large scale is cancelled, the dosage of the medicament is reduced, the cost of the medicament is reduced, and the problem of high treatment cost of the membrane preparation wastewater is effectively solved.
Description
Technical Field
The invention relates to a method for treating membrane-making wastewater.
Background
The membrane technology is a high-efficiency, energy-saving and environment-friendly separation technology, and has great potential in industries of wastewater reclamation, product refining and separation and the like. With the wide application of membrane technology, membrane-making enterprises are increasing day by day, however, a large amount of organic wastewater is generated in the membrane preparation process, the wastewater has the characteristics of high COD value, high toxicity, poor biodegradability and the like, and if the wastewater is directly discharged into a water body, the water quality is deteriorated, the microbial activity is inhibited, and the ecological environment of the water body is damaged.
Chinese patent 201310319712.5 discloses a treatment method for wastewater generated in ultrafiltration membrane production, and chinese patent 201711158995.4 discloses a UF membrane-making wastewater treatment process and a circulation treatment device thereof.
The two patents of the invention use the plasma treatment technology, and the plasma treatment technology usually needs high equipment investment, needs a large amount of medicaments such as hydrogen peroxide, ferrous sulfate and the like, and has relatively high medicament cost, so that the treatment cost per ton of water is increased, and the production cost of a film making enterprise is indirectly increased.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defect of high treatment cost of membrane-making wastewater in the prior art and provides a treatment method of membrane-making wastewater.
The invention solves the technical problems through the following technical scheme:
a treatment method of membrane-making wastewater is characterized by comprising the following steps: s1, introducing the pretreated membrane-making wastewater into an anoxic part with bacteria for treatment; s2, introducing the membrane-making wastewater treated by the anoxic part into an integrated membrane biological reaction part provided with an MBR flat membrane module; s3, the mixed liquid in the integrated membrane biological reaction part is sent back to the anoxic part, and meanwhile, the membrane-making wastewater is discharged after the treatment of the integrated membrane biological reaction part reaches the standard.
In this scheme, adopt above-mentioned step, denitrogenate and degrade the organic matter in the membrane waste water, reach biological denitrogenation's effect. Compared with the common membrane-making wastewater treatment method, the method has the advantages that the plasma treatment technology which is expensive and not applied in large scale is cancelled, the medicament dosage is reduced, the medicament cost is reduced, the problem of high membrane-making wastewater treatment cost is effectively solved, the ton water investment cost and the ton water treatment cost of water treatment equipment are reduced, and the production and operation cost of enterprises is indirectly reduced.
Preferably, the bacteria in the anoxic part include denitrifying bacteria, and in step S3, the mixed liquor in the integrated membrane biological reaction part includes aerobic microorganisms and anaerobic microorganisms in a dormant state.
In this scheme, adopt above-mentioned step, adopt biological reaction technique to do benefit to and reduce the medicament dosage, medicament cost reduction has effectively solved the problem that membrane preparation waste water treatment cost is high.
Preferably, between the step S1 and the step S2, the processing method further includes the steps of: s11, carrying out aeration treatment on the film-making wastewater.
In this scheme, adopt above-mentioned step, aeration treatment does benefit to and improves the concentration of microorganism in the waste water, increases fungus crowd quantity and kind.
Preferably, before the step S1, the processing method further includes the steps of: s01, carrying out hydrolytic acidification treatment on the membrane preparation wastewater.
In this scheme, adopt above-mentioned step, hydrolytic acidification converts the organic matter of aquatic from macromolecule to micro molecule, is convenient for follow-up denitrifying bacteria's absorption and utilization and does benefit to subsequent aerobic microbial treatment.
Preferably, before the step S01, the processing method further includes the steps of: s02, carrying out electrolytic treatment on the membrane-making wastewater by using an iron-carbon micro-electrolysis filler.
In this scheme, adopt above-mentioned step, through redox reaction, turn into the macromolecule organic matter that is difficult to degrade in the membrane preparation waste water into the micromolecule of easy degradation, improve the biodegradability of waste water, reduce the load of intaking of follow-up processing technology.
Preferably, before the step S02, the processing method further includes the steps of: s03, adjusting the pH value of the membrane preparation wastewater to 2-3.
In the scheme, the steps are adopted, the PH value of the membrane-making wastewater is adjusted to be acidic, and the membrane-making wastewater is favorable for better electrolytic treatment in the follow-up process.
Preferably, after the step S02 and before the step S01, the processing method further includes the steps of: s021, adjusting the pH value of the membrane-making wastewater after electrolysis treatment to 6.5-9.5, and carrying out aeration stirring treatment.
In the scheme, the steps are adopted, and the pH value is adjusted to be in a proper range so as to meet the biological activity of microorganisms in the wastewater.
Preferably, after the step S021 and before the step S01, the processing method further includes the steps of: s022, filtering the precipitate in the membrane preparation wastewater.
In this scheme, adopt above-mentioned step, get rid of the suspended solid and the flocculus in the membrane preparation waste water through the precipitation for later play water is cleaner.
Preferably, the processing method further comprises the steps of: and S04, recovering the precipitate obtained by filtering in the step S022, dehydrating the precipitate, and returning the solution obtained after dehydration to the step S03.
In the scheme, the steps are adopted, so that the treatment effect of the treatment method on the membrane-making wastewater is favorably improved, and the emission of harmful substances is reduced.
Preferably, after the step S022 and before the step S01, the processing method further includes the steps of: s05, adding a carbon source into the membrane preparation wastewater.
In this scheme, adopt above-mentioned step, played emergent effect, effectively prevented that aerobic microorganisms from degrading the organic matter in the waste water excessively after, the microorganism that gets into anaerobism portion, oxygen deficiency portion lacks the material source to guarantee the survival of microorganism and effectively increase.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
compared with the common membrane-making wastewater treatment method, the treatment method has the advantages that the biological reaction technology is adopted and the integrated membrane biological reaction part is combined, so that the plasma treatment technology which is expensive and not applied in a large scale is cancelled, the dosage of the medicament is reduced, the medicament cost is reduced, and the problem of high treatment cost of the membrane-making wastewater is effectively solved.
Drawings
FIG. 1 is a schematic flow chart of a method for treating membrane production wastewater according to an embodiment of the present invention.
FIG. 2 is a schematic view of a method for treating membrane production wastewater according to an embodiment of the present invention.
Description of reference numerals:
accident waste water storage part 1
Adjusting part 2
Reaction part 4
Settling section 5
Carbon source addition part 6
Integrated membrane biological reaction part 10
Mixed liquid reflux apparatus 12
Sludge tank 13
Automatic plate and frame filter press 14
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
The embodiment of the invention provides a treatment method of membrane-making wastewater, which comprises the following steps as shown in figures 1 and 2: s1, introducing pretreated membrane-making wastewater into an anoxic part 8 with bacteria for treatment; s2, introducing the membrane-making wastewater treated by the anoxic part 8 into an integrated membrane biological reaction part 10 provided with an MBR flat membrane module; and S3, returning the mixed liquid in the integrated membrane biological reaction part 10 to the anoxic part 8, and discharging the membrane-making wastewater after the membrane-making wastewater is treated by the integrated membrane biological reaction part 10 and reaches the standard.
By adopting the steps, the pretreated membrane-making wastewater is introduced into the anoxic part 8 with denitrifying bacteria, the denitrifying bacteria in the anoxic part 8 can perform denitrification under the anoxic condition, the denitrifying bacteria can convert nitrate nitrogen in the wastewater into nitrogen to achieve the biological denitrification effect, and the process section can perform denitrification and degradation on organic matters in the membrane-making wastewater to achieve the biological denitrification effect. Membrane preparation waste water through the oxygen deficiency portion 8 is led into an integrated membrane biological reaction portion 10 provided with an MBR flat membrane component, the MBR flat membrane component can further degrade and separate the membrane preparation waste water, microorganisms in the membrane preparation waste water are intercepted and flow back into the oxygen deficiency portion 8 through a mixed liquid backflow device 12 to react, the concentration of the microorganisms in the oxygen deficiency portion 8 is improved, the purpose of microorganism concentration is achieved, meanwhile, the biological reaction efficiency of the oxygen deficiency portion 8 is also improved, and finally the membrane preparation waste water up to the standard is processed through the integrated membrane biological reaction portion 10 and is led into a clear water portion 11 to be discharged.
The integrated membrane biological reaction part 10 is a novel water treatment technology combining a high-efficiency membrane separation technology and an activated sludge method, can maintain the amount of high-concentration microorganisms in a treatment device, improves the volume load of the treatment device, and simultaneously, because of the high-efficiency interception function of the membrane, the microorganisms are completely intercepted in a bioreactor, so that the thorough separation of hydraulic retention time and sludge retention time is realized, and the sludge expansion problem of the traditional activated sludge process is eliminated.
Compared with the common membrane preparation wastewater treatment method, the treatment method has the advantages that the biological reaction technology is adopted and the integrated membrane biological reaction part 10 is combined, so that the plasma treatment technology which is expensive and not applied in a large scale is cancelled, the dosage of the medicament is reduced, the medicament cost is reduced, the problem of high membrane preparation wastewater treatment cost is effectively solved, the per-ton water investment cost and the per-ton water treatment cost of water treatment equipment are reduced, and the production and operation cost of enterprises is indirectly reduced.
In a preferred embodiment, as shown in fig. 1 and 2, the bacteria in the anoxic section 8 include denitrifying bacteria, and in step S3, the mixed liquor in the integrated membrane bioreactor 10 includes aerobic microorganisms and anaerobic microorganisms in a dormant state.
The anoxic part 8 adopts denitrifying bacteria which can convert nitrate nitrogen in the wastewater into nitrogen under the condition of anoxic so as to denitrify and degrade organic matters in the film-making wastewater, thereby achieving the effect of biological denitrification.
The MBR flat membrane module in integrated form membrane biological reaction portion 10 can hold back the aerobic microorganism and the anaerobic microorganism of dormancy state in the membrane preparation waste water to flow back through mixed liquid and react in the oxygen deficiency portion 8, improved the microorganism concentration in the oxygen deficiency portion 8, and reach the concentrated purpose of microorganism, also improved the biological reaction efficiency of oxygen deficiency portion 8 simultaneously.
By adopting the biological reaction technology, the dosage of the medicament is favorably reduced, the medicament cost is reduced, and the problem of high treatment cost of membrane-making wastewater is effectively solved.
As a preferred embodiment, as shown in fig. 1 and 2, between step S1 and step S2, the processing method further includes the steps of: s11, carrying out aeration treatment on the film-making wastewater.
An aerobic part 9 is also arranged between the anoxic part 8 and the integrated membrane biological reaction part 10, an aeration device is arranged in the aerobic part 9, and the waste water is oxygenated by blowing air by a fan. Aerobic microorganisms in the wastewater grow and reproduce under the condition that oxygen and organic matters are sufficient and easy to decompose, the concentration of the aerobic microorganisms is improved (can reach 6000-8000 mg/l), membrane-making wastewater in the anoxic part 8 flows from reserved water to the aerobic part 9, the concentration of the microorganisms in the wastewater can be improved through aeration treatment in the aerobic part 9, the number and the types of floras are increased, and meanwhile, the aerobic microorganisms in the aerobic part 9 have the effects of decomposing, synthesizing and adsorbing organic pollutants so as to reduce the BOD5 and COD values of the wastewater.
As a preferred embodiment, as shown in fig. 1 and fig. 2, before step S1, the processing method further includes the steps of: s01, carrying out hydrolytic acidification treatment on the membrane preparation wastewater.
An anaerobic part 7 is arranged before the anoxic part 8, the anaerobic part 7 can carry out hydrolytic acidification treatment on the membrane-making wastewater, the hydrolytic acidification treatment is to carry out biocatalysis reaction on macromolecular substances which are difficult to biodegrade in water through enzyme released by hydrolytic bacteria and acid-producing bacteria, the specific expression is chain scission and water solubility, and microorganisms complete intracellular biochemical reaction by utilizing water-soluble substrates and simultaneously discharge various organic acids. The hydrolytic acidification process can intercept non-dissolved organic matters in the membrane-making wastewater and gradually convert the non-dissolved organic matters into dissolved organic matters, some macromolecular substances which are difficult to biodegrade are converted into micromolecular substances which are easy to degrade, such as organic acid and the like, so that the biodegradability and the degradation speed of the wastewater are greatly improved, meanwhile, a PH meter is also arranged in the anaerobic part 7, the anaerobic acidification condition in the anaerobic part 7 is monitored on line, an alkali adding port is reserved, the PH value is ensured to be in the range of 6.5-7.5, a trace amount of alkali liquor is required to be added when the acidity is too low, the anaerobic bacteria are ensured to work continuously, the organic matters in the water are converted into micromolecules from macromolecules by the anaerobic part 7, the absorption and the utilization of denitrifying bacteria in the anoxic part 8 are facilitated, and the subsequent aerobic microorganism treatment in the aerobic part 9 is facilitated.
As a preferred embodiment, as shown in fig. 1 and fig. 2, before step S01, the processing method further includes the steps of: s02, carrying out electrolytic treatment on the membrane-making wastewater by using an iron-carbon micro-electrolysis filler.
The carbon source adding part 6 is provided with the internal electrolysis part 3 in front, the internal electrolysis part 3 is filled with iron-carbon micro-electrolysis filler, the iron-carbon micro-electrolysis filler is of a framework type alloy structure formed by sintering iron and carbon at high temperature, and has the advantages of large specific surface area, high reaction rate, difficult passivation and continuous maintenance of a high-activity iron bed, when membrane-making wastewater is treated by an internal electrolysis method, iron is used as an anode, carbon is used as a cathode, a large number of tiny iron-carbon primary batteries are formed in the membrane-making wastewater solution to generate electrode reaction, and under the acidic condition and in the presence of oxygen, a potential difference of 1.22V can be generated under the condition without an external power supply, so that countless primary battery systems can be formed in the internal electrolysis part 3 after the membrane-making wastewater enters the internal electrolysis part 3, ferrous ions are generated, the ferrous ions can generate oxidation-reduction reaction with pollutants in the wastewater, macromolecule organic matters difficult to degrade in the wastewater are converted into micromolecules easy to degrade, the biodegradability of the membrane-making is improved, and the water inlet load of subsequent treatment processes is reduced.
In the electrolysis process, proper amount of aeration is carried out in the internal electrolysis part 3, and the oxygen generated by aeration can improve the potential difference so as to accelerate the reaction of the primary battery; the rising impulsive force of the bubbles can drive the filler to move, so that an inert layer formed on the surface of the filler is eliminated, the transmission speed of electrons is increased, and the phenomenon of hardening caused by filler deposition is prevented.
As a preferred embodiment, as shown in fig. 1 and fig. 2, before step S02, the processing method further includes the steps of: s03, adjusting the pH value of the membrane preparation wastewater to 2-3.
The adjusting part 2 is arranged in front of the inner electrolysis part 3, the membrane-making wastewater comprises membrane-making concentrated solution and membrane-making flushing water, the membrane-making concentrated solution is lifted to the adjusting part 2 by a pump and then is mixed with the membrane-making flushing water, the accident drainage in the accident wastewater storage part 1 is also introduced into the adjusting part 2, hydrochloric acid is added into the membrane-making wastewater in the adjusting part 2 to adjust the pH value of the membrane-making wastewater to 2-3 and then is introduced into the inner electrolysis part 3, so that the membrane-making wastewater can be better electrolyzed in the inner electrolysis part 3.
As a preferred embodiment, as shown in fig. 1 and fig. 2, after step S02 and before step S01, the processing method further includes the steps of: s021, adjusting the pH value of the membrane-making wastewater after the electrolysis treatment to 6.5-9.5, and carrying out aeration stirring treatment.
Still be equipped with reaction portion 4 between internal electrolysis portion 3 and carbon source addition part 6, the membrane making waste water lets in reaction portion 4 after the electrolysis, adjusts the pH value of membrane making waste water to alkaline through adding sodium hydroxide in the membrane making waste water in reaction portion 4, and the pH value control range is 6.5-9.5, and the optimum pH value is 8, and it is too low unsuitable microorganism survival to adjust the pH value, so adjust to neutral alkali bias to satisfy the biological activity of microorganism in the waste water.
Carry out aeration stirring to membrane preparation waste water simultaneously in reaction process and handle so that make the reaction more complete, ferrous hydroxide that ferrous ion can combine the production with the hydroxyl in reaction portion 4, the aeration stirring can make partial ferrous hydroxide oxidation to ferric hydroxide, and ferric hydroxide and ferrous hydroxide all are fine flocculating agent, produce the floccule in reaction portion 4, have improved reaction portion 4 and have got rid of the effect such as COD and SS in the waste water.
As a preferred embodiment, as shown in fig. 1 and fig. 2, after step S021 and before step S01, the processing method further includes the steps of: s022, filtering the precipitate in the membrane-making wastewater.
Be equipped with precipitation part 5 between reaction part 4 and carbon source addition part 6, let in precipitation part 5 with the membrane preparation waste water in reaction part 4, carry out solid-liquid separation to the membrane preparation waste water in precipitation part 5, supernatant after the sediment flows into carbon source addition part 6, and suspension and the floccule in the membrane preparation waste water are got rid of through the precipitation to precipitation part 5 for later play water is cleaner.
As a preferred embodiment, as shown in fig. 1 and fig. 2, the processing method further includes the steps of: and S04, recovering the precipitate obtained by filtering in the step S022, dehydrating the precipitate, and returning the solution obtained after dehydration to the step S03.
The sediment in the settling part 5 can form mud, regularly arranges the mud in the settling part 5 to the mud jar 13 and carries out sludge concentration, and mud after the concentration is taken out to automatic plate and frame filter press 14 and is carried out dehydration treatment, and the mud cake after the dehydration is outward transported and is dealt with, and filtrating flows back to regulating part 2 through filtering fluid reservoir 15, does benefit to the treatment effect that improves processing method to membrane waste water, reduces the emission of harmful substance.
As a preferred embodiment, as shown in fig. 1 and fig. 2, after step S022 and before step S01, the processing method further includes the steps of: s05, adding a carbon source into the film-making wastewater.
A carbon source adding part 6 is arranged in front of the anaerobic part 7, the carbon source adding part 6 plays an emergency role, if the aerobic microorganisms excessively degrade organic matters in the wastewater, the microorganisms entering the anaerobic part 7 and the anoxic part 8 lack material sources, and under the abnormal condition, a carbon source can be added into the film-making wastewater through the carbon source adding part 6, the added carbon source is mainly harmless organic matters such as glucose or sodium acetate and the like which can be degraded by the microorganisms, the organic matters are converted into carbon dioxide, water and proliferated microorganisms after being degraded, the adding amount of the carbon source can be determined according to the amount of nitrate nitrogen in the operation process, the requirement of the anaerobic microorganism group on the carbon-nitrogen ratio is met, and the amount is controlled to be about 100.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. A treatment method of membrane-making wastewater is characterized by comprising the following steps:
s1, introducing the pretreated membrane-making wastewater into an anoxic part with bacteria for treatment;
s2, introducing the membrane-making wastewater treated by the anoxic part into an integrated membrane biological reaction part provided with an MBR flat membrane module;
and S3, feeding the mixed liquid in the integrated membrane biological reaction part back to the anoxic part, and discharging the membrane-making wastewater after the membrane-making wastewater reaches the standard in the integrated membrane biological reaction part.
2. The method for treating membrane-making wastewater as defined in claim 1, wherein the bacteria in the anoxic section include denitrifying bacteria, and in step S3, the mixed liquid in the integrated membrane biological reaction section includes aerobic microorganisms and anaerobic microorganisms in a dormant state.
3. The method for treating membrane-forming wastewater according to claim 1, further comprising, between the step S1 and the step S2:
s11, carrying out aeration treatment on the film-making wastewater.
4. The method for treating membrane-forming wastewater according to claim 3, wherein before the step S1, the method further comprises the steps of:
s01, carrying out hydrolytic acidification treatment on the membrane preparation wastewater.
5. The method for treating membrane production wastewater as defined in claim 4, further comprising, before the step S01, the step of:
s02, carrying out electrolytic treatment on the membrane-making wastewater by using an iron-carbon micro-electrolysis filler.
6. The method for treating membrane production wastewater according to claim 5, wherein before the step S02, the method further comprises the steps of:
s03, adjusting the pH value of the membrane preparation wastewater to 2-3.
7. The method for treating membrane-forming wastewater according to claim 5, further comprising, after step S02 and before step S01:
s021, adjusting the pH value of the membrane-making wastewater after electrolysis treatment to 6.5-9.5, and carrying out aeration stirring treatment.
8. The method for treating membrane production wastewater as claimed in claim 7, wherein after step S021 and before step S01, the method further comprises the steps of:
s022, filtering the precipitate in the membrane preparation wastewater.
9. The method for treating membrane production wastewater according to claim 8, further comprising the step of:
and S04, recovering the precipitate obtained by filtering in the step S022, dehydrating the precipitate, and returning the solution obtained after dehydration to the step S03.
10. The method for treating membrane-forming wastewater as set forth in claim 8, wherein after step S022 and before step S01, the method further comprises the steps of:
and S05, adding a carbon source into the film-making wastewater.
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