CN102491516A - Method for treating wastewater difficult to be biodegraded by electric microorganism and membrane filtration coupled technology - Google Patents
Method for treating wastewater difficult to be biodegraded by electric microorganism and membrane filtration coupled technology Download PDFInfo
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- CN102491516A CN102491516A CN2011103801120A CN201110380112A CN102491516A CN 102491516 A CN102491516 A CN 102491516A CN 2011103801120 A CN2011103801120 A CN 2011103801120A CN 201110380112 A CN201110380112 A CN 201110380112A CN 102491516 A CN102491516 A CN 102491516A
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Abstract
The invention relates to a method for treating wastewater difficult to be biodegraded by an electric microorganism and membrane filtration coupled technology. The method is characterized in that: a reactor is separated into an anaerobic area and an area by a separating plate, a negative plate is placed in the anaerobic area, a TiO2/carbon film as a positive electrode is disposed in the aerobic area, and with an average pore size of 0.1-0.4 micrometer, the TiO2/carbon film adopts negative pressure water suction. The voltage of electrocatalysis is about 1.5-5V. The total hydraulic retention time is maintained at 10-20h, and the hydraulic retention time ratio of the anaerobic and aerobic areas in the reactor is 1:1-3:1. The stirring intensity of the anaerobic area is 2-8w/m<3>, and the gas-water ratio of aeration in the aerobic area is 5-10:1. The method of the invention is developed by employing electro-catalyzed and intensified microorganisms for reduction and oxidization of wastewater difficult to be biodegraded and coupling a membrane filtration technology. A TiO2/carbon film as a positive electrode is employed for negative pressure water suction, thus simplifying the technical process. Meanwhile, the TiO2/carbon film as a positive electrode has good oxidation and removal effects on membrane fouling caused by organic matters, so that membrane fouling can be radically controlled.
Description
Technical field
The present invention relates to a kind of electric biofilm filtration coupling technique and handle the method for waste water difficult for biological degradation, this method mainly adopts reduction of electrocatalysis enhancement microbiological and oxidation waste water difficult for biological degradation and coupled film filtering technique and develops, and belongs to field of environment protection,
Background technology
Along with social industrial expansion; The processing of hardly degraded organic substance is the difficult point in the environmental improvement in the water surrounding; Trend to the trade effluent that contains hardly degraded organic substance variation day by day and the increasing of biochemical treatment difficulty; Particularly pharmaceutical wastewater, dyeing waste water and chemical fuel waste water etc., the waste water complicated component, colourity is big, bio-toxicity is big.Conventional biological treatment effect is poor, and the water outlet suspension content is high.Electrocatalysis is as a kind of biostimulation factor; Make organism produce a series of electric field biochemical effect; Influence to organism has become biophysics and biochemical research content; The electricity biology is an important subject of electrocatalysis and biotechnology crossing domain, and with electrocatalytic reaction such as heat production, liberation of hydrogen, analyse oxygen, electromigration and be used for biological respinse effectively, its core is a formation electrochemistry, the pollutent electronic cloud is induced and the metabolic multiphase coupled process of mikrobe.
Load TiO
2Carbon film be a kind of micro-filtration/isolating inorganic porous membrane of ultrafiltration level that has, carbon-based films is to be made through high temperature pyrolysis by carbonaceousmaterial, with nano level TiO
2Fire to load on and process TiO on the carbon-based films
2/ carbon film, this TiO
2/ carbon film has good conductivity, good biocompatibility, high score from advantages such as abilities, electrocatalysis be with a wide range of applications aspect wastewater membrane is separated.
Summary of the invention
The objective of the invention is to electrocatalysis, membrane filtration and anaerobism and aerobe processing are combined, improve the electrocatalysis microbe body and tie up to Persistent organic pollutants aspect cooperative reinforcing degradation efficiency, and adopt TiO
2/ carbon film is as the anode of electrocatalysis, and be coupled electric biological degradation and membrane filtration provide a kind of and under electrocatalysis, utilize efficient, the stable degraded organic wastewater with difficult degradation thereby of mikrobe, and pass through as anodic TiO
2/ carbon film filters the novel method of water outlet.、
The invention is characterized in: reactor drum is divided into two zones of anaerobic and aerobic through dividing plate, and negative plate is placed in the anaerobic zone, and negative plate adopts palladium or the plating palladium pole plate with gentle slow release hydrogen (electronics) function of Chu Qing, and only stir in this zone, not aeration; TiO
2/ carbon film is placed in the aerobic zone as anode, TiO
2/ carbon film adopts the negative pressure-pumping water outlet, and this zone is carried out the aeration oxygen supply and stirred the power supply employing D.C. regulated power supply of electrocatalysis.The anaerobic zone of reactor drum is in the anaerobic state, and under the situation of external electric field hydrogen supply (electronics), anaerobion sees through respiration and transmits hydrogen (electronics) to Persistent organic pollutants, carries out the anaerobic reduction degraded, and then waste water outflow gets into aerobic zone, at TiO
2After anodic oxidation of/carbon film and biology aerobic are handled, through TiO
2The water outlet of/carbon film negative pressure-pumping, TiO
2/ carbon film lower end closed, the upper end links to each other TiO with negative pressure lift pump rising pipe
2The external diameter of/carbon film 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 μ m.Electrocatalysis microbiological deterioration reactor drum can be given full play to the coupling of mikrobe and electrocatalysis, and mikrobe can keep the best degraded environment separately under anaerobism or aerobic condition.The voltage of electro catalytic electrode is 1.5～5V, and total hrt is at 10～20h, and the anaerobism of reactor drum is 1: 1～3: 1 with the hydraulic detention time in aerobic zone ratio.The stirring intensity of anaerobic zone is 2～8w/m
3, the GWR of aerobic regional aeration is 5～10: 1.
The invention has the advantages that: given full play to electric biology and membrane filtration coupled advantage, adopted as anodic TiO
2Technical process has been simplified in the water outlet of/carbon film.This method can make the COD of organic wastewater with difficult degradation thereby remove more than 90%, and color removal is more than 95%, and the film water outlet has improved the efficient of solid-liquid separation, stable effluent quality.While TiO
2The film that/carbon film causes organism as anode pollutes good oxidation removal effect is arranged, and film pollutes and obtained essence control.
Description of drawings
Figure: electric biofilm filtration coupling technique is handled the schematic flow sheet of waste water difficult for biological degradation
1. aerobic regional 4. water inlet 5. whisking appliances 6. dividing plate overflows, 7. negative plate 8.TiO of direct supply 2. reactor drum anaerobic zone 3. reactor drums
2/ carbon film anode 9. spoil disposals 10. negative pressure-pumping water outlets 11. aeration pumps
Embodiment
Embodiment 1:
Adopt electric biofilm filtration coupling technique to handle the coking chemical industrial organic wastewater, handle water yield 15m
3/ h.This organic waste water contains phenol, cyanogen, chlorophenol, coal tar wet goods organism, and COD content is between 1500～3000mg/L.Coking chemical industrial organic wastewater residence time in reactor drum is 10h; The anaerobic zone and the aerobic regional water power residence time are 5h; The microorganism concn of anaerobic zone is between 3000～5000mg/L, and the microorganism concn in aerobic zone is between 2000～4000mg/L.The anaerobic zone power of agitator is 150W, and the GWR of the aeration in aerobic zone is 8: 1, and negative plate adopts the netted dull and stereotyped pole plate of titanium base plating palladium, adopts TiO
2/ carbon film is as anode, and the voltage that direct supply applied is 3.5V.
After debugging steady running, the film effluent quality is following: phenol＜0.5mg/L, and cyanogen＜0.2mg/L, COD＜90mg/L, in debugging and nearly 1 year almost not decay of membrane flux in service, film pollutes and has obtained better controlled.This invention provides new method and thinking for the efficient degradation of organic wastewater with difficult degradation thereby.
Embodiment 2:
The sewage at treatment of dyeing wastewater station contains the EX-SF DISPERSE BLUE EX-SF 300 ionic dyes, and colourity is 300～500 times, and COD is 300～500mg/L, and SS is 130mg/L, and the processing water yield is 200m
3/ d, BOD/COD is 0.25, biochemical is relatively poor.Original place science and engineering skill adopts the flow process of coagulating sedimentation-microbiological anaerobic degraded-microorganism aerobic degraded, and the concentration of water outlet COD is at 100～150mg/L, and effluent color dilution is high, and discontented toe ring is protected emission request.Adopt the electric biofilm filtration coupling technique of this invention to transform for improving removal effect, the netted titanium base plating of drum type palladium negative plate is installed in anaerobic reactor, TiO is installed in Aerobic Pond
2/ carbon film is as anode, and the current stabilization volts DS provides the voltage of 4.5V.After the installation of electrocatalysis pole plate; Through one month operation debugging, begin normally to move, handle wastewater flow, water quality is constant; Carried out water quality detection under the also constant situation of hydraulic detention time; The detection effluent quality is: effluent COD concentration is at 30～50mg/L, and clearance is more than 92%, and colourity is at 10～15 times.After the transformation, it is nearly 30% that the more former technology of the processing efficiency of waste water has improved, and only increases by 5% and handle working cost, and film pollutes and obtained control preferably, membrane flux kept stable.Satisfied the needs and transformation requirement of environmental protection, and stable.
Draw from embodiment 1 and embodiment 2: adopt a kind of electric biofilm filtration coupling technique of the present invention to handle the method for waste water difficult for biological degradation; Treatment effect to waste water difficult for biological degradation is stable; More traditional microbial process has bigger lifting on treatment effect, simultaneously TiO
2/ carbon film pollutes film as the anodic oxygenizement and has obtained better controlled, and this invention can promote transformation to improve processing efficiency to the prior biological treatment process.
A kind of electric biofilm filtration coupling technique that the present invention proposes is handled the method for waste water difficult for biological degradation; Be described through embodiment; Person skilled obviously can be changed or suitably change and combination content as herein described in not breaking away from content of the present invention, spirit and scope, realizes the present invention.Special needs to be pointed out is, the replacement that all are similar and change apparent to those skilled in the artly, they are regarded as and are included in spirit of the present invention, scope and the content.
Claims (6)
1. an electric biofilm filtration coupling technique is handled the method for waste water difficult for biological degradation; It is characterized in that: reactor drum is divided into two zones of anaerobic and aerobic through dividing plate; Negative plate is placed in the anaerobic zone, and negative plate adopts palladium or the plating palladium pole plate with gentle slow release hydrogen (electronics) function of Chu Qing, and only stir in this zone; Aeration not, TiO
2/ carbon film is placed in the aerobic zone as anode, TiO
2/ carbon film adopts the negative pressure-pumping water outlet, and this zone is carried out the aeration oxygen supply and stirred.The power supply of electrocatalysis adopts D.C. regulated power supply, and the anaerobic zone of reactor drum is in the anaerobic state, and under the situation of external electric field hydrogen supply (electronics), anaerobion sees through respiration and transmits hydrogen (electronics) to Persistent organic pollutants, carries out the anaerobic reduction degraded.Then waste water outflow gets into aerobic zone, at TiO
2After anodic oxidation of/carbon film and biology aerobic are handled, through TiO
2The water outlet of/carbon film negative pressure-pumping, TiO
2The film that/carbon film causes organism as anode pollutes good oxidation removal effect is arranged, and film pollutes and obtained essence control.TiO
2/ carbon film lower end closed, the upper end links to each other TiO with negative pressure lift pump rising pipe
2The external diameter of/carbon film 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 μ m.Electrocatalysis microbiological deterioration reactor drum can be given full play to the coupling of mikrobe and electrocatalysis, and mikrobe can keep the best degraded environment separately under anaerobism or aerobic condition.The voltage of electro catalytic electrode is 1.5～5V, and total hrt is at 10～20h, and the anaerobism of reactor drum is 1: 1～3: 1 with the hydraulic detention time in aerobic zone ratio.The stirring intensity of anaerobic zone is 2～8w/m
3, the GWR of aerobic regional aeration is 5～10: 1.
2. handle the method for waste water difficult for biological degradation like the described a kind of electric biofilm filtration coupling technique of claim 1, it is characterized in that in the positive plate of electrocatalysis and the anaerobism and aerobic two different zones that negative plate is separately positioned on same reactor drum.The reactor drum total hrt is at 10～20h, and the anaerobism of reactor drum is 1: 1～3: 1 with the hydraulic detention time in aerobic zone ratio.The stirring intensity of anaerobic zone is at 2～8w/m
3, the GWR of the aeration in aerobic zone is 5～10: 1.
3. handle the method for waste water difficult for biological degradation like the described a kind of electric biofilm filtration coupling technique of claim 1; It is characterized in that at first reactor area of organic wastewater with difficult degradation thereby; Then get into the aerobic zone of reactor drum, at last at aerobic zone passage TiO through the dividing plate overflow
2The water outlet of/carbon film negative pressure-pumping.
4. handle the method for waste water difficult for biological degradation like the described a kind of electric biofilm filtration coupling technique of claim 1, it is characterized in that the negative electrode material is palladium or plating palladium pole plate, the negative plate shape can be plate or round tube type, and structure can be netted or tabular.Anode adopts TiO
2/ carbon film, TiO
2The external diameter of/carbon film 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 μ m.
5. handle the method for waste water difficult for biological degradation like the described a kind of electric biofilm filtration coupling technique of claim 1, it is characterized in that negative and positive interpolar voltage is: 1.5～5V.
6. handle the method for waste water difficult for biological degradation like the described a kind of electric biofilm filtration coupling technique of claim 1, it is characterized in that TiO
2/ carbon film is as the electrocatalysis anode, catalytic oxidation TiO
2/ carbon film surface organic pollutant, the film pollution that organism is caused has obtained essence control.
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Cited By (6)
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|---|---|---|---|---|
| CN104628133A (en) * | 2015-02-03 | 2015-05-20 | 浙江大学 | Overflow type electrochemical biological membrane reactor |
| 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 |
| CN107082485A (en) * | 2017-06-21 | 2017-08-22 | 哈尔滨工业大学 | The method that azo dyes composite pollution waste water is removed using bio-electrochemical reactor system |
| CN109851046A (en) * | 2019-03-14 | 2019-06-07 | 南京理工大学 | A kind of the anaerobic membrane biosystem processing unit and method of Chlorophenol |
| 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 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104628133A (en) * | 2015-02-03 | 2015-05-20 | 浙江大学 | Overflow type electrochemical biological membrane reactor |
| 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 |
| CN107082485A (en) * | 2017-06-21 | 2017-08-22 | 哈尔滨工业大学 | The method that azo dyes composite pollution waste water is removed using bio-electrochemical reactor system |
| CN109851046A (en) * | 2019-03-14 | 2019-06-07 | 南京理工大学 | A kind of the anaerobic membrane biosystem processing unit and method of Chlorophenol |
| 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 |
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Application publication date: 20120613 |