CN104261628A - Method for treating degradation-resistant organic wastewater by membrane potential biological coupling process - Google Patents
Method for treating degradation-resistant organic wastewater by membrane potential biological coupling process Download PDFInfo
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- CN104261628A CN104261628A CN201410527709.7A CN201410527709A CN104261628A CN 104261628 A CN104261628 A CN 104261628A CN 201410527709 A CN201410527709 A CN 201410527709A CN 104261628 A CN104261628 A CN 104261628A
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F3/005—Combined electrochemical biological 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2853—Anaerobic digestion processes using anaerobic membrane bioreactors
Abstract
The invention relates to a method for treating degradation-resistant organic wastewater by a membrane potential biological coupling process. The method is characterized in that membrane potential biological coupling process comprises two zones, namely the anaerobic zone and the aerobic zone; a cathode plate is placed in the anaerobic zone; a filtering membrane and an anode plate are placed in the aerobic zone; the average pore size of the membrane is 0.1-0.4 microns; during membrane filtration, negative pressure suction is used for filtering the wastewater. The method is provided on the basis of adoption of electrically-assisted reinforcing microorganisms for reduction and oxydative degradation of degradation-resistant biological wastewater and a coupling membrane filtration technology, complete separation of anaerobic and aerobic microorganisms is achieved, the membrane filtration outlet water is used, and a process flow is simplified; by the method, CODCr removing rate in the degradation-resistant organic wastewater is more than 90%, and the removal rate of chroma is more than 95%; through electrobiological enhanced degradation, the wastewater treatment effect is good and membrane pollution is controlled relatively better; through membrane outlet water, the solid-liquid separating efficiency is improved and the water quality of the outlet water is stable.
Description
Technical field
The present invention relates to the method for a kind of film electricity biological coupling art breading difficult for biological degradation organic waste water; the method mainly adopts the auxiliary microorganism of electricity (electricity is biological) strengthening organic wastewater with difficult degradation thereby reduction and Oxidative Degradation Process and coupled film filtering technique is developed; belong to field of environment protection
Background technology
Along with social industrial expansion, in water surrounding, the process of hardly degraded organic substance is the difficult point in environmental improvement, for containing hardly degraded organic substance trade effluent day by day variation and biochemical treatment difficulty strengthen trend, particularly pharmaceutical wastewater, dyeing waste water, chemical industry and fuel waste water etc., waste component is complicated, colourity is large, bio-toxicity is large.Conventional biological treatment effect is poor, goes out water suspension content high.The auxiliary means, particularly electric auxiliary cathode as a kind of enhancement microbiological process of electricity provide the electron donor needed for micro-reduction degraded, greatly can improve biological deoxidization, degradation efficiency.In addition, electricity is auxiliary as a kind of biostimulation factor, makes organism produce a series of electric field biochemical effect, also further increases the degradation efficiency of microorganism.The core of electricity living things system forms electricity to assist the multiphase coupled process with bacteria metabolism, to improve the processing efficiency of difficult for biological degradation organic waste water.
Membrane filtration is a kind of process of high efficiency separation, is widely used in water treatment field, as the CMF technique etc. of MBR sewage treatment process, reusing sewage.Organic wastewater with difficult degradation thereby affects the mud-water separation of sludge microbe because of its water quality characteristic, cause after biological treatment to go out water suspension content high, not only affect effluent quality but also affect the enrichment of sludge microbe of biological degradation system.Therefore electricity is biological and membrane filtration is coupled, and component film electricity biological coupling art breading organic wastewater with difficult degradation thereby is with a wide range of applications.
Summary of the invention
The object of the invention is to electricity biology and membrane filtration to combine, improve film electricity bioprocess technology cooperative reinforcing degradation efficiency in Persistent organic pollutants.There is provided a kind of under electrocatalysis, utilize efficient, the stable degraded organic wastewater with difficult degradation thereby of microorganism, and by the novel method of film filtration effluent.
The invention is characterized in: electric living things system is divided into anaerobic and aerobic two regions, negative plate is placed in anaerobic zone, negative plate adopts palladium pole plate, plating palladium pole plate or the graphite electrode plate with the gentle slow release electric function of accumulate, and this district only stirs, not aeration; Positive plate is placed on aerobic zone, and filtering membrane is also placed in aerobic zone, purges face in this district's aeration oxygen supply.The anaerobic zone of coupling technique is in the state of anaerobism, when electric auxiliary power supply, anaerobion utilizes the electron reduction degradable organic pollutant of electric assisted Extraction confession, then waste water outflow enters aerobic zone, after biology aerobic process and anodic oxidation treatment are carried out in aerobic zone, through negative pressure-pumping film filtration effluent.The external diameter of filtering membrane is between 5.0 ~ 15mm, and internal diameter is between 2 ~ 12mm, and the mean pore size of film is between 0.1 ~ 0.4 μm.Electricity living things system can give full play to the auxiliary strengthening effect of microorganism and electricity, and microorganism can keep respective the best degraded environment under anaerobic and aerobic condition.The voltage of electricity supporting electrode is 0.2 ~ 3V, and total hrt is at 20 ~ 50h, and the anaerobism of coupling technique is 1: 1 ~ 5: 1 with the hydraulic detention time ratio of aerobic zone.The stirring intensity of anaerobic zone is 2 ~ 8w/m
3, the gas-water ratio of aerobic region aeration is 5 ~ 10: 1.
The invention has the advantages that: the advantage having given full play to electric biology and membrane filtration coupling, simplifies technical process.The method can make the COD of organic wastewater with difficult degradation thereby
crremove more than 90%, color removal is more than 95%, and electric biology improves wastewater treatment efficiency, and fouling membrane obtains good control.Film water outlet improves the efficiency of solid-liquid separation, stable effluent quality.
Accompanying drawing explanation
Fig. 1: the schematic flow sheet of film electricity biological coupling art breading organic wastewater with difficult degradation thereby
1. water inlet 2. anaerobism mixed solution overflow 6. anaerobic precipitation district 7., agitator 3. negative plate 4. anaerobic zone 5. anaerobic effluents
8. positive plate 9. film suction water outlet 10. positive column 11. vacuum pump 12. aerating system 13. direct supply
Embodiment
Embodiment 1:
Adopt film electricity biological coupling art breading coking chemical industrial organic wastewater, process water yield 15m
3/ h.This organic waste water contains phenol, cyanogen, chlorophenol, coal tar wet goods organism, COD
crcontent is between 1500 ~ 3000mg/L.The residence time is 20h to coking chemical industrial organic wastewater in the reactor, anaerobic zone and the aerobic regional water power residence time are 10h, the microorganism concn of anaerobic zone is between 3000 ~ 5000mg/L, and the microorganism concn in aerobic region is between 2000 ~ 4000mg/L.Anaerobic zone power of agitator is 150W, and the gas-water ratio of the aeration of aerobic zone is 8: 1, and negative plate adopts the netted dull and stereotyped pole plate of titanium base plating palladium, and anode adopts graphite electrode plate, and the voltage that direct supply applies is 1.2V.
After debugging steady running, film effluent quality is as follows: phenol < 0.5mg/L, cyanogen < 0.2mg/L, COD < 90mg/L, in debugging and the operation of nearly a year, membrane flux is not almost decayed, good sewage processing effect, fouling membrane obtains good control.This invention is that the efficient degradation of organic wastewater with difficult degradation thereby provides new method and thinking.
Embodiment 2:
The sewage at treatment of dyeing wastewater station is containing EX-SF DISPERSE BLUE EX-SF 300 ionic dyes, and colourity is 300 ~ 500 times, COD
crbe 300 ~ 500mg/L, SS be 130mg/L, the process water yield is 200m
3/ d, BOD/COD are 0.25, and biochemical is poor.Former treatment process adopts the flow process of coagulating sedimentation-microbiological anaerobic degraded-microorganism aerobic degraded, water outlet COD
crconcentration at 100 ~ 150mg/L, effluent color dilution is high, and discontented toe ring protects emission request.Adopt the electro-biofilm of this invention filtration coupling technique to transform for improving removal effect, in anaerobic reactor, install drum type netted titanium base plating palladium negative plate, in Aerobic Pond, install net-shaped steel pole plate as anode, current stabilization volts DS provides the voltage of 1.5V.After pole plate installation, through the operation debugging of month, start normally to run, constant in process wastewater flow, water quality, carried out water quality detection when hydraulic detention time is also constant, detecting effluent quality is: water outlet COD
crconcentration is at 30 ~ 50mg/L, and clearance is more than 92%, and colourity is at 10 ~ 15 times.After transformation, the more former technique of processing efficiency of waste water improves nearly 30%, and processes working cost and only increase by 5%, and fouling membrane obtains good control, membrane flux kept stable.Meet needs and the transformation requirement of environmental protection, and stable.
Draw from embodiment 1 and embodiment 2: the method adopting a kind of film electricity biological coupling art breading organic wastewater with difficult degradation thereby of the present invention, the treatment effect of waste water difficult for biological degradation is stablized, microbial process more traditional on treatment effect has larger lifting, the raising of processing efficiency simultaneously also makes fouling membrane obtain good control, and this invention can carry out Promotion Transformation to improve processing efficiency to existing biological treatment.
The method of a kind of film electricity biological coupling art breading organic wastewater with difficult degradation thereby that the present invention proposes, be described by embodiment, person skilled obviously can not depart from content of the present invention, spirit and scope content as herein described is changed or suitably change with combination, realize the present invention.Special needs to be pointed out is, all similar replacements and change apparent to those skilled in the art, they are deemed to be included in spirit of the present invention, scope and content.
Claims (5)
1. the method for a film electricity biological coupling art breading organic wastewater with difficult degradation thereby, it is characterized in that: film electricity biological coupling technique is divided into anaerobic and aerobic two regions, negative plate is placed in anaerobic zone, negative plate adopts palladium pole plate, plating palladium pole plate or the graphite electrode plate with the gentle slow release electric function of accumulate, this region is only stirred, not aeration, and filtering membrane and positive plate are all placed in aerobic region, film adopts negative pressure-pumping water outlet, and this aerobic zone is carried out aeration oxygen supply and purged film surface; The power acquisition D.C. regulated power supply that electricity is auxiliary, the anaerobic zone of film electricity biological coupling technique is in the state of anaerobism, anaerobion utilizes the electron reduction degradable organic pollutant of electric assisted Extraction confession, then waste water outflow enters aerobic zone, after biology aerobic process and anodic oxidation treatment are carried out in aerobic zone, through negative pressure-pumping film filtration effluent; The enhancing degradation of electricity biology makes good sewage processing effect, and fouling membrane obtains good control; Film water outlet improves the efficiency of solid-liquid separation, stable effluent quality; The external diameter of filtering membrane is between 5.0 ~ 15mm, and internal diameter is between 2 ~ 12mm, and the mean pore size of film is between 0.1 ~ 0.4 μm; Electricity living things system can give full play to the auxiliary strengthening effect of microorganism and electricity, and microorganism can keep respective the best degraded environment under anaerobism or aerobic condition; The voltage of electricity supporting electrode is 0.2 ~ 3V, and total hrt is at 20 ~ 50h, and the anaerobism of reactor is 1: 1 ~ 5: 1 with the hydraulic detention time ratio in aerobic region; The stirring intensity of anaerobic zone is 2 ~ 8w/m
3, the gas-water ratio of aerobic region aeration is 5 ~ 10: 1.
2. the method for a kind of film electricity biological coupling art breading organic wastewater with difficult degradation thereby as described in claim 1, is characterized in that in the anaerobism that the positive plate that electricity is auxiliary and negative plate are separately positioned on film electricity biological coupling technique and aerobic two different zones; Reactor total hrt is at 10 ~ 20h, and the anaerobism of reactor is 1: 1 ~ 5: 1 with the hydraulic detention time ratio in aerobic region; The stirring intensity of anaerobic zone is at 2 ~ 8w/m
3, the gas-water ratio of the aeration in aerobic region is 5 ~ 10: 1.
3. the method for a kind of film electricity biological coupling art breading organic wastewater with difficult degradation thereby as described in claim 1, it is characterized in that first organic wastewater with difficult degradation thereby enters film electricity biological coupling technique anaerobic zone after micro-reduction degraded, enter aerobic region again to degrade, finally by negative pressure-pumping film filtration effluent.
4. the method for a kind of film electricity biological coupling art breading organic wastewater with difficult degradation thereby as described in claim 1, it is characterized in that anaerobion is separated completely with aerobic microbiological, negative plate is placed on anaerobic zone, and positive plate and filtering membrane are all placed on aerobic zone, and aerobic zone aeration oxygen supply also purges film surface.
5. the method for a kind of film electricity biological coupling art breading organic wastewater with difficult degradation thereby as described in claim 1, is characterized in that the voltage between anode and cathode is: 0.2 ~ 3V.
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| CN201410527709.7A CN104261628A (en) | 2014-10-09 | 2014-10-09 | Method for treating degradation-resistant organic wastewater by membrane potential biological coupling process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773909A (en) * | 2015-03-31 | 2015-07-15 | 浙江大学 | Device and process for treating printing and dyeing wastewater by combining microbial electrolysis cell and anaerobic/aerobiotic technology |
| CN104909514A (en) * | 2015-03-09 | 2015-09-16 | 浙江大学 | Integrated system for solar-driven microbial electrolysis cell strengthening treatment on rural domestic sewage |
| WO2017193090A1 (en) * | 2016-05-06 | 2017-11-09 | D.C Water & Sewer Authority | Overcoming biofilm diffusion in water treatment |
| CN111977899A (en) * | 2020-08-14 | 2020-11-24 | 武汉轻工大学 | Treatment system and method for high-concentration nonbiodegradable organic wastewater |
| CN112010420A (en) * | 2020-08-11 | 2020-12-01 | 盐城工学院 | Electrochemical biological accelerated treatment reaction device for azo dye wastewater |
| CN114685012A (en) * | 2022-04-27 | 2022-07-01 | 广东硕光环保科技有限公司 | Fishery wastewater treatment method |
-
2014
- 2014-10-09 CN CN201410527709.7A patent/CN104261628A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104909514A (en) * | 2015-03-09 | 2015-09-16 | 浙江大学 | Integrated system for solar-driven microbial electrolysis cell strengthening treatment on rural domestic sewage |
| CN104773909A (en) * | 2015-03-31 | 2015-07-15 | 浙江大学 | Device and process for treating printing and dyeing wastewater by combining microbial electrolysis cell and anaerobic/aerobiotic technology |
| CN104773909B (en) * | 2015-03-31 | 2016-08-24 | 浙江大学 | Microorganism electrolysis cell is combined device and the technique processing dyeing waste water with aerobic/anaerobic |
| WO2017193090A1 (en) * | 2016-05-06 | 2017-11-09 | D.C Water & Sewer Authority | Overcoming biofilm diffusion in water treatment |
| AU2017261363B2 (en) * | 2016-05-06 | 2023-04-06 | D.C Water & Sewer Authority | Overcoming biofilm diffusion in water treatment |
| CN112010420A (en) * | 2020-08-11 | 2020-12-01 | 盐城工学院 | Electrochemical biological accelerated treatment reaction device for azo dye wastewater |
| CN111977899A (en) * | 2020-08-14 | 2020-11-24 | 武汉轻工大学 | Treatment system and method for high-concentration nonbiodegradable organic wastewater |
| CN111977899B (en) * | 2020-08-14 | 2022-08-05 | 武汉轻工大学 | Treatment system and method for high-concentration nonbiodegradable organic wastewater |
| CN114685012A (en) * | 2022-04-27 | 2022-07-01 | 广东硕光环保科技有限公司 | Fishery wastewater treatment method |
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Application publication date: 20150107 |
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