CN102502946A - Method for treating chemical wastewater by utilizing three-dimensional electrode-biological membrane process - Google Patents
Method for treating chemical wastewater by utilizing three-dimensional electrode-biological membrane process Download PDFInfo
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- CN102502946A CN102502946A CN2011104425079A CN201110442507A CN102502946A CN 102502946 A CN102502946 A CN 102502946A CN 2011104425079 A CN2011104425079 A CN 2011104425079A CN 201110442507 A CN201110442507 A CN 201110442507A CN 102502946 A CN102502946 A CN 102502946A
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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
Abstract
The invention discloses a method for treating chemical wastewater by utilizing a three-dimensional electrode-biological membrane process. The method is implemented by the following steps: (1) arranging activated carbon into a membrane biological reaction tank of activated sludge, and conducting continuous aeration; (2) taking a Ti/PbO2 plate as an anode, taking a stainless steel plate as a cathode, binding an activated carbon fiber layer on the surface of the stainless steel plate, and taking the activated carbon as a third electrode; (3) adding activated sludge into a reaction container, and adding nutrient solution so as to culture a biological membrane on the activated carbon; and (4) enabling wastewater to be treated to enter the reaction container in a flow rising manner through a water inlet, and simultaneously controlling the current density and hydraulic retention time, thus realizing the continuous running and better treatment effect of a reactor. The invention provides the wastewater treatment process which combines an electrochemistry method and a biological membrane method, and has the advantages of high mass transfer efficiency, large reaction area, high processing efficiency, and simplicity and convenience in operation.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, more particularly, relate to a kind of method of wastewater treatment that utilizes three-diemsnional electrode and microbial film to combine.
Background technology
Along with development economic and society, shortage of water resources has become the common challenge that the whole world faces, in the face of a lot of countries of this problem all the regenerated using of sewage as one of important means that solves shortage of water resources.Be the traditional biological treatment process of representative with the active sludge for a long time, in the processing of sewage and trade effluent, be used widely, advantage such as it has, and treatment process is perfect, treatment effect is stable.But also exist floor space big, initial cost is big, produces problems such as a large amount of excess sludges.The material that contains a large amount of high toxicities, high density, bio-refractory in the trade effluent; These materials are difficult to removed by traditional second-stage treatment technology; Cause still containing in sewage work's bio-chemical effluent the hazardous and noxious substances of finite concentration level; Water environment safety and human existence are caused very big harm, need advanced treatment badly.
In order to overcome these problems; Various novel, sewage disposal technology arises at the historic moment efficiently, the membrane bioreactor (Membrane bioreactor, MBR) technology that particularly membrane separation technique and biological treatment are combined; Because of it replaces the second pond in the traditional biological treatment process; Realize high sludge concentration operation, and have advantages such as effluent quality is good, running maintenance is simple, floor space is little, sludge concentration is high, excess sludge production is low, be used widely in field of waste water treatment.Though the MBR technology has the advantage that many traditional activated sludge processes do not have.But its energy consumption is high, the high two big bottlenecks that hinder the MBR development that are still of cost.It is the major cause that causes MBR running cost high that high film price and frequent film pollute the membrane module cleaning, the replacing that cause.And film pollutes that the film cause shortens work-ing life, frequent matting, membrane flux descends and the problems such as increase of process cost, big limitations the promotion and application of MBR technology.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of sewage treatment process that electrochemical method and microbial film method are combined is provided, have the mass-transfer efficiency height, conversion zone is big, and processing efficiency is high, characteristics easy and simple to handle.
The object of the invention is achieved through following technical proposals:
A kind of method of utilizing three-diemsnional electrode-biomembrane process process of chemical waste water disposal, carry out according to following step:
(1) be in the membrane biological reaction pond of 3000-4000mg/L as for activated sludge concentration with gac, and carry out uninterrupted aeration, gac stopped 72 hours in reaction tank at least
(2) with Ti/PbO
2Plate for anodal, be negative pole with the stainless steel plate and bind the NACF layer on its surface, be the 3rd utmost point with the gac of handling through step (1)
(3) in reaction vessel, add active sludge, and add nutrient solution on gac, to cultivate microbial film
(4) pending waste water is got in the reaction vessel with the up-flow mode through water-in, simultaneously control current density and hydraulic detention time are with the continuous operation of realization response device and treatment effect preferably
The reaction vessel that technical scheme of the present invention is used is three-diemsnional electrode-biofilm reactor, comprises power supply, anode, negative electrode, gac microbial film and reactor body, wherein:
The bottom of said reactor body 11 is provided with water-in 10 and slag-drip opening 9, and the top is provided with water outlet 8;
Be provided with dividing plate 12 in the said reactor body 11, said dividing plate 12 is provided with pole plate socket and water distribution uniformity hole;
Said anode 5 is separately positioned among the pole plate socket of dividing plate 12 with negative electrode 6, and is connected with negative pole with the positive pole of power supply respectively;
Said negative electrode is provided with the NACF layer;
Be provided with gac biological membranous layer 7 between said anode and the negative electrode.
Said anode can be selected Ti/PbO for use
2Plate.
Said negative electrode can be selected stainless material for use.
Said power supply is preferably current regulator power supply.
In technical scheme of the present invention, the preferred 2-3mm of the particle diameter of said gac, gac residence time in reaction tank is 72-120 hour in the said step (1).In the said step (2), the thickness of said NACF layer is 4-6mm, the gravel size decision 10cm * 10cm of battery lead plate.In said step (3); In 3 D electrode reactor, adding concentration is the active sludge of 100mg/L; According to mol ratio C: N: P=100: 5: 1 ratio; In reactor drum, added glucose 3.12g, bicarbonate of ammonia 0.079g, potassium primary phosphate 0.027g, calcium chloride 0.04g, sal epsom 0.024g, ferric sulfate 0.056g, zinc sulfate 0.004g and copper sulfate 0.003g in per two days, to cultivate biomembranous purpose on the gac that is implemented in interpolation; During use, earlier anode and negative electrode are fixed in the pole plate socket on the dividing plate, then gac are put between two electrodes,, and carry out microbial film and cultivate as the 3rd utmost point.In the said step (4), current density is controlled at 0.125mA/cm
2-1.0mA/cm
2, hydraulic detention time generally is controlled at 2.5-3h.
At present, in the majority in the advanced treatment of wastewater technology with the physical chemistry means.Physical means mainly contains coagulating sedimentation, membrane filtration, absorption method, and high-level oxidation technology such as Fenton method, ozone, photochemical catalytic oxidation, wet oxidation, and electrochemical process etc.Electrochemical process, mainly be utilize that electrode reaction produces like OH, Cl
2Deng material, the hazardous and noxious substances in the water is carried out direct oxidation and indirect oxidation.Three-diemsnional electrode is claimed granule electrode again, is a kind of novel electrochemical reactor; The granular working electrode material of filling between the electrode of conventional two-dimensional electrolyzer, and make it charged, become the 3rd utmost point; And participate in removal reaction to organic pollution materials, and having the mass-transfer efficiency height, conversion zone is big; Processing efficiency is high, characteristics easy and simple to handle.Technical scheme of the present invention; The 3rd utmost point gac in traditional three-diemsnional electrode is put into the immersion that active sludge carries out for some time earlier; Take out then and put back in the reactor drum; And in reactor drum, add glucose and cultivate, make activated carbon surface apposition growth microbial film form the gac biological membranous layer, utilize it to electrolysis after waste water further handle.In addition, gac can also be as catalyzer, and the hydrogen peroxide that electrolytic process is produced produces more hydroxyl radical free radical, removes organism.
When carrying out WWT, water inlet is by squeezing into the reactor drum from reactor bottom through constant flow pump 2 in the tank 1, and water (flow) direction is a flow lifting type; Through behind the dividing plate; Get in the gac biological membranous layer between anode and the negative electrode, feed a spot of electric current, and utilize and freely be grown in the 3rd mikrobe that extremely go up the organic Decomposition in the waste water; Better degree secondary effluent not up to standard in the Chemical Manufacture has been carried out advanced treatment, make it COD
CrReach discharging standards.
The present invention has following characteristics: (1) said reactor drum combines electrochemical process and biological process two big waste water treatment process, has farthest reduced organic content in the water; (2) said reactor drum utilizes microbial film that the waste water that improves biochemical is further handled, and has reduced consumption of electric, has improved current efficiency, has saved the electricity charge; (3) microbial film in the said reactor drum is that mikrobe freely is grown in the 3rd utmost point activated carbon surface, does not need special inoculation work, and is easy and simple to handle, is easy to running maintenance.
Description of drawings
Fig. 1 is the schema that the technical scheme of utilization invention is carried out WWT, wherein 1 tank, 2 constant flow pumps, 3, valve, 4 current regulator power supplies, 5 anodes, 6 negative electrodes, 7 gac microbial films, 8 water outlets, 9 slag-drip openings, 10 water-ins.
Fig. 2 is three-diemsnional electrode-biofilm reactor structural representation that the present invention uses, and wherein 11 is reactor body, and 12 is dividing plate.
Fig. 3 is the structural representation (wherein negative electrode adopts stainless steel to be material) of negative electrode in three-diemsnional electrode-biofilm reactor of using of the present invention.
Fig. 4 is the structural representation of three-diemsnional electrode-biofilm reactor median septum of using of the present invention.
Embodiment
Further specify technical scheme of the present invention below in conjunction with specific embodiment.A kind of three-diemsnional electrode-biofilm reactor that the present invention uses comprises power supply, anode, negative electrode, gac microbial film and reactor body, and wherein: the bottom of said reactor body 11 is provided with water-in 10 and slag-drip opening 9, and the top is provided with water outlet 8; Be provided with dividing plate 12 in the said reactor body 11, said dividing plate 12 is provided with pole plate socket and water distribution uniformity hole; Said anode 5 is separately positioned among the pole plate socket of dividing plate 12 with negative electrode 6, and is connected with negative pole with the positive pole of power supply respectively; Said negative electrode is provided with the NACF layer; Be provided with gac biological membranous layer 7 between said anode and the negative electrode.Specifically,
(1) be in the membrane biological reaction pond of 3000-4000mg/L as for activated sludge concentration with gac, and carry out uninterrupted aeration, gac stopped in reaction tank 72-120 hour
(2) in reaction vessel, with Ti/PbO
2Plate for anodal, be negative pole with the stainless steel plate and bind the NACF layer on its surface, thickness 4-6mm, the size of battery lead plate is 10cm * 10cm, is the 3rd utmost point with gac, activated carbon particle size 2-3mm, above-mentioned three electrodes are formed three-diemsnional electrode jointly
(3) in 3 D electrode reactor, adding concentration is the active sludge of 100mg/L; According to mol ratio C: N: P=100: 5: 1 ratio added glucose 3.12g, bicarbonate of ammonia 0.079g, potassium primary phosphate 0.027g, calcium chloride 0.04g, sal epsom 0.024g, ferric sulfate 0.056g, zinc sulfate 0.004g and copper sulfate 0.003g and cultivates microbial film in per two days in reactor drum.
(4) wastewater from chemical industry is pumped into the inside reactor of microbial film-three-diemsnional electrode through water-in with the mode of up-flow, it is following to carry out WWT:
The COD of former water
CrScope 60-85mg/L, Cl
-Concentration range 1500-2000mg/L, BOD
5Scope 1-9mg/L, conductivity range 7500-8500 μ S/cm, water inlet pH scope 8.4-8.8.Former water is injected three-diemsnional electrode-biofilm reactor with flow lifting type, and the current density of adjusting three microelectrodes-biofilm reactor is 0.125mA/cm
2, 0.25mA/cm
2, 0.5mA/cm
2And 1.0mA/cm
2, by the design of 3 hours residence time.Through long-time running, treatment effect is shown in table one.
Table one three-diemsnional electrode-biofilm reactor last effect
| Current density (mA/cm 2) | 0.125 | 0.25 | 0.5 | 1.0 |
| COD CrClearance (%) | 19％ | 25％ | 35％ | 55％ |
This reactor drum can make Cl at electrolysis wastewater
-Be transformed into Cl
2, microbial growth is had a negative impact.Be respectively 0.125mA/cm through changing current density
2, 0.25mA/cm
2, 0.5mA/cm
2, 1.0mA/cm
2, the microbial biomass on the 3rd utmost point gac presents the trend that growth earlier reduces again, and wherein, current density is 0.5mA/cm
2The time, the biofilm biomass in the reactor drum is maximum, reaches the 120-130mgCOD/g gac.
Because this reactor drum produces H in the electrolysis wastewater process
+Therefore, can make the H of former water
+Concentration increases, and is respectively 0.125mA/cm through regulate electrical current density
2, 0.25mA/cm
2, 0.5mA/cm
2, 1.0mA/cm
2, can find out that the pH value is reducing always.When current density is 0.5mA/cm
2The time, the pH of waste water is near neutral.
The present invention is 0.5mA/cm in current density
2Condition under, three-diemsnional electrode-biofilm reactor water outlet COD
CrValue is a little more than 40mg/L, and treatment effect is enough good, reach country-level B standard basically, and biofilm biomass is relatively stable, so 0.5mA/cm
2It is a more suitable operational conditions.
More than exemplary description has been done in invention; Should be noted that; Under the situation that does not break away from core of the present invention, the replacement that is equal to that any simple distortion, modification or other those skilled in the art can not spend creative work all falls into protection scope of the present invention.
Claims (5)
1. a method of utilizing three-diemsnional electrode-biomembrane process process of chemical waste water disposal is characterized in that, carries out according to following step:
(1) be in the membrane biological reaction pond of 3000-4000mg/L as for activated sludge concentration with gac, and carry out uninterrupted aeration, gac stopped 72 hours in reaction tank at least
(2) with Ti/PbO
2Plate for anodal, be negative pole with the stainless steel plate and bind the NACF layer on its surface, be the 3rd utmost point with the gac of handling through step (1)
(3) in reaction vessel, add active sludge, and add nutrient solution on gac, to cultivate microbial film
(4) pending waste water is got in the reaction vessel with the up-flow mode through water-in, simultaneously control current density and hydraulic detention time are with the continuous operation of realization response device and treatment effect preferably
Wherein said reaction vessel is three-diemsnional electrode-biofilm reactor, comprises power supply, anode, negative electrode, gac microbial film and reactor body, wherein:
The bottom of said reactor body is provided with water-in and slag-drip opening, and the top is provided with water outlet;
Be provided with dividing plate in the said reactor body, said dividing plate is provided with pole plate socket and water distribution uniformity hole;
Said anode and negative electrode are separately positioned among the pole plate socket of dividing plate, and are connected with negative pole with the positive pole of power supply respectively; Be provided with the gac biological membranous layer between said anode and the negative electrode.
2. a kind of method of utilizing three-diemsnional electrode-biomembrane process process of chemical waste water disposal according to claim 1 is characterized in that, the preferred 2-3mm of the particle diameter of said gac, and gac residence time in reaction tank is 72-120 hour in the said step (1).
3. a kind of method of utilizing three-diemsnional electrode-biomembrane process process of chemical waste water disposal according to claim 1 is characterized in that in the said step (2), the thickness of said NACF layer is 4-6mm, the gravel size decision 10cm * 10cm of battery lead plate.
4. a kind of method of utilizing three-diemsnional electrode-biomembrane process process of chemical waste water disposal according to claim 1; It is characterized in that; In said step (3); In 3 D electrode reactor, adding concentration is the active sludge of 100mg/L; According to mol ratio C: N: P=100: 5: 1 ratio added glucose 3.12g, bicarbonate of ammonia 0.079g, potassium primary phosphate 0.027g, calcium chloride 0.04g, sal epsom 0.024g, ferric sulfate 0.056g, zinc sulfate 0.004g and copper sulfate 0.003g in per two days, to cultivate biomembranous purpose on the gac that is implemented in interpolation in reactor drum.
5. a kind of method of utilizing three-diemsnional electrode-biomembrane process process of chemical waste water disposal according to claim 1 is characterized in that in the said step (4), current density is controlled at 0.125mA/cm
2-1.0mA/cm
2, hydraulic detention time generally is controlled at 2.5-3h.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103193317A (en) * | 2013-04-21 | 2013-07-10 | 北京工业大学 | Reinforced denitrification method for three-dimensional electrode biological film |
| CN104925916A (en) * | 2015-04-29 | 2015-09-23 | 四川和鼎环保工程有限责任公司 | Dynamic electrocatalytic oxidation experimental method for sewage |
| CN104925911A (en) * | 2015-04-29 | 2015-09-23 | 四川和鼎环保工程有限责任公司 | Dynamic electrocatalytic oxidation experiment system for sewage |
| CN105062867A (en) * | 2015-09-14 | 2015-11-18 | 天津大学 | Self-driven ulothrix culturing device and cultural method thereof |
| CN107337327A (en) * | 2017-09-15 | 2017-11-10 | 大连浩海水处理技术有限公司 | A kind of integrated sewage treatment device |
| CN108147528A (en) * | 2018-01-09 | 2018-06-12 | 宁波大红鹰学院 | A kind of electro photoluminescence microbial ecological prosthetic device |
| CN112979092A (en) * | 2021-03-22 | 2021-06-18 | 南京大学 | Three-dimensional electrode biological enhanced treatment system and method for removing dissolved organic matters and reducing toxicity of industrial wastewater |
| CN113354212A (en) * | 2021-06-29 | 2021-09-07 | 安徽科技学院 | Coupling biological membrane electrochemistry is with having waste water treatment device from inhaling filtration formula |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103193317A (en) * | 2013-04-21 | 2013-07-10 | 北京工业大学 | Reinforced denitrification method for three-dimensional electrode biological film |
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| CN105062867A (en) * | 2015-09-14 | 2015-11-18 | 天津大学 | Self-driven ulothrix culturing device and cultural method thereof |
| CN107337327A (en) * | 2017-09-15 | 2017-11-10 | 大连浩海水处理技术有限公司 | A kind of integrated sewage treatment device |
| CN108147528A (en) * | 2018-01-09 | 2018-06-12 | 宁波大红鹰学院 | A kind of electro photoluminescence microbial ecological prosthetic device |
| CN112979092A (en) * | 2021-03-22 | 2021-06-18 | 南京大学 | Three-dimensional electrode biological enhanced treatment system and method for removing dissolved organic matters and reducing toxicity of industrial wastewater |
| CN113354212A (en) * | 2021-06-29 | 2021-09-07 | 安徽科技学院 | Coupling biological membrane electrochemistry is with having waste water treatment device from inhaling filtration formula |
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Application publication date: 20120620 |