CN112811731A - Antifouling stifled system of anaerobic membrane bioreactor - Google Patents
Antifouling stifled system of anaerobic membrane bioreactor 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/282—Anaerobic digestion processes using anaerobic sequencing batch reactors
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2853—Anaerobic digestion processes using anaerobic membrane bioreactors
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Abstract
The invention discloses an anti-fouling and anti-blocking system of an anaerobic membrane bioreactor, belonging to the field of anaerobic technologies. The device comprises a bioreactor, a biological carrier is arranged in the bioreactor, a cathode and an anode are respectively arranged in the bioreactor, an external power supply and a sliding resistor are arranged outside the bioreactor, the external power supply, the sliding rheostat, the cathode and the anode form a closed circuit, a back washing assembly is further arranged outside the bioreactor, a methane collecting device is further arranged outside the bioreactor, one end of the methane collecting device is communicated with a methane reflux pump through a pipeline, the output end of the methane reflux pump is communicated with a methane reflux pipe, and one end of the methane reflux pipe is communicated with the back washing assembly arranged outside the bioreactor. According to the anti-fouling technology for the anaerobic bioreactor, provided by the invention, membrane pollution in the bioreactor is relieved and the treatment efficiency of the bioreactor is improved by adding a biological carrier into the bioreactor and the like.
Description
Technical Field
The invention relates to an anti-fouling and anti-blocking system of an anaerobic membrane bioreactor, belongs to the field of anaerobic technologies, and mainly provides a method for relieving membrane fouling of the anaerobic membrane bioreactor.
Background
The anaerobic membrane biological treatment technology is a sewage treatment technology combining traditional anaerobic digestion with a membrane filtration system, and has the advantages of recovery realization, convenient operation and the like. However, due to the higher organic loading, the concentration of Extracellular Polymeric Substance (EPS) and Soluble Microbial Product (SMP) in the system increases, causing clogging of the filter membrane.
The traditional effective method for relieving membrane pollution comprises the following steps: has optimized operation mode and cleaning and maintenance of the membrane. By optimizing operation modes such as improving the aeration mode of the system, adjusting aeration quantity, pretreating sewage and the like, the method can delay membrane pollution to a certain extent, but cannot recover membrane flux, so that the filter membrane can be recycled. In order to restore the membrane flux and ensure the long-term stability of the system, the cleaning of the membrane becomes a key step. The membrane cleaning includes backwashing, mechanical scraping, chemical cleaning, electric cleaning and other cleaning means. Backwash is a process of removing contaminants from the membrane surface by liquid/gas flushing from the permeate side of the membrane. The mechanical scraping is to remove the pollutants mechanically by passing foam plastic balls and sponge balls repeatedly through the surface of the membrane, and the method is suitable for cleaning the surface of the membrane with organic colloid as a pollutant component. The chemical cleaning is to soak and clean the membrane with an alkaline cleaner, an acidic cleaner, an enzyme cleaner or a surfactant, which can effectively remove the deposits inside the membrane. Electrocleaning is the application of an electric field across a membrane that causes charged particles or molecules to move in the direction of the electric field, and the application of the electric field over a time interval removes the particles or molecules at the membrane interface.
CN 111573782A ' water treatment equipment membrane pollution control method and device ' adopt the washing mode of back flush and vibration machinery washing combination, simultaneously through stirring and gas-water stirring reinforcing water body's stirring, but because back flush and vibration machinery can only wash the pollution on membrane surface, can not high-efficiently get rid of the pollutant of jam in the membrane inside.
CN111644070A 'Reversal Water reverse osmosis membrane cleaning agent' invents a method for cleaning by adopting an acidic cleaning agent and an alkaline cleaning agent, and provides formulas of the two cleaning agents, but because chemicals are required to be added, the membrane structure is easy to damage, and new pollutants are introduced into the treated sewage.
Therefore, there is a need for an improved method for preventing and alleviating membrane fouling, while achieving intelligent control to solve the problem of membrane fouling.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides an anti-fouling and anti-blocking system of an anaerobic membrane bioreactor, which mainly aims at the defects of the prior art and aims to relieve membrane blockage and improve the treatment efficiency of the bioreactor.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the utility model provides an antifouling stifled system of anaerobic membrane bioreactor, includes bioreactor, the inside biological carrier that is equipped with of bioreactor, bioreactor's inside is equipped with negative pole and positive pole respectively, bioreactor's outside is equipped with external power source and sliding resistor, external power source, sliding rheostat, negative pole and positive pole four constitute closed circuit, bioreactor's outside still is equipped with the back flush subassembly, bioreactor's outside still is equipped with methane collection device, methane collection device one end has marsh gas backwash pump through the pipeline intercommunication, marsh gas backwash pump output intercommunication has the marsh gas back flow, the one end intercommunication of marsh gas back flow is in bioreactor's outside still is equipped with on the back flush subassembly.
The sponge has the characteristics of porous structure, large specific surface area, light weight and the like, so that the sponge is more suitable for being used as a biological carrier of a bioreactor than fluidized GAC (granular activated carbon) or PAC (powdered activated carbon), the sponge medium with high porosity has high adsorption capacity on micro-pollutants, promotes the growth of the micro-organisms and improves the biomass of the bioreactor, thereby being beneficial to removing the pollutants from wastewater, and meanwhile, the micro-organisms are attached to the sponge, so that the probability that flocculent micro-organisms and produced EPS and other substances thereof block membrane components in the bioreactor is reduced;
it should be further noted that: the arrangement of the closed circuit can enhance the microbial activity and relieve the membrane scaling, because the higher the applied voltage is, the higher the absolute value of the Zeta potential of the sludge is, the more the quantity of negative charges on the surface of the sludge is, the larger the electrostatic repulsion force among sludge particles is, therefore, the sludge is not easy to deposit and agglomerate on the surface of the membrane, the forming speed of a sludge cake layer is slower, thereby the membrane pollution is slowed down, meanwhile, the electrostatic repulsion action between the sludge particles and substances in the wastewater caused by an electric field can also weaken the thickness, the stability and the compactness of the sludge cake layer formed on the surface of the membrane, the structure of the sludge cake layer becomes looser by applying the electric field, and the positive influence is exerted on the reduction of the membrane pollution.
As a preferred example, the back washing assembly comprises a back washing pipe, the biogas return pipe is communicated with the back washing pipe, the back washing pipe is communicated with a four-way pipe, the four-way pipe is positioned on one side of the biogas return pipe, one end of the four-way pipe is communicated with a sludge return pump, one end of the sludge return pump extends into the bioreactor and is communicated with the cathode, the other end of the four-way pipe also extends into the bioreactor and is communicated with a gas flushing device, the third end of the four-way pipe directly extends into the bioreactor, one end of the cathode is also communicated with a water outlet pipe through a guide pipe, the water outlet pipe is arranged at the outer wrapping part of the bioreactor, and one end of the water outlet pipe is communicated with a water outlet pump.
As a preferred example, the cathode comprises a synthetic metal conductive net, and the synthetic metal conductive net contains a hollow fiber membrane component, and one end of the four-way pipe is close to the hollow fiber membrane.
As a preferable example, a pressure gauge is arranged between the water outlet pipe and the water outlet pump.
As a preferred example, the bottom of one side of the bioreactor is communicated with a water inlet pipe, a liquid flow sensor is arranged on the water inlet pipe, an online PH electrode, an online temperature sensor and an online COD sensor are also sequentially arranged on the bioreactor, and the pressure gauge, the liquid flow sensor, the online PH electrode, the online temperature sensor and the online COD sensor are all controlled by a PLC control system.
It should be noted that: a PLC control system is used for controlling the backwashing process; setting a pressure gauge connected with a cathode so as to measure a transmembrane pressure (TMP) value at any time, feeding the TMP value back to a PLC intelligent control system, stopping water feeding of a reactor to perform backwashing when the TMP value exceeds 0.4MPa, performing backwashing under the condition of voltage generated by a closed circuit, applying an electric field on a hollow fiber membrane to promote charged particles or molecules to move along the direction of the electric field, and removing the particles or molecules on the interface of the hollow fiber membrane on the cathode by applying the electric field in a certain time interval; the backwashing component also comprises a water tank, and biological cleaning agent is added into the water tank, can remove EPS, SMP and other substances in the membrane, can be biodegraded, is green and environment-friendly, and has no influence on subsequent treatment; the methane generated in the bioreactor is used for gas back flushing, the bioreactor can be kept in an anaerobic environment in the whole process, the back flushing component starts back flushing for 10S by using the methane, then the water added with the biological cleaning agent in the water tank is pumped out by an external pump for back flushing for 30S, at the moment, the gas flushing is stopped, and the back flushing process is completed by only using the water for 20S.
As a preferred example, the filling ratio of the graphene-modified sponge is 19.5% to 20.5%.
It should be noted that: microorganisms are attached to the graphene modified sponge holes, so that the sludge characteristics are improved, and the growth conditions of the microorganisms are changed;
because the graphene has conductivity, the modified sponge carrier also has certain conductivity, microorganisms are attached to the modified sponge carrier in the reactor with the applied voltage, and the activity of the microorganisms can be improved by an electric field generated by the applied voltage, so that the treatment efficiency of the anaerobic reactor is improved.
As a preferred example, the graphene modified sponge is prepared by mixing a reticulated porous polyester-polyurethane sponge with graphene, and is prepared by the following specific steps:
s1, preparing netted porous polyester-polyurethaneThe density of the sponge is 30 kg/m3Cutting the reticular porous polyester-polyurethane sponge into pieces with the diameter of 20 multiplied by 20mm, wherein the specific surface area of the reticular porous polyester-polyurethane sponge is 0.846m2/g；
And S2, adding the graphene powder into the mixer, and stirring the graphene powder by an impeller of a stirring paddle to help the graphene powder to enter the reticular porous polyester-polyurethane sponge.
It should be noted that: the applied electric field can enhance the microbial activity and relieve the scaling of the anaerobic membrane, because the higher the applied voltage is, the higher the absolute value of the Zeta potential of the sludge is, the more the quantity of negative charges on the surface of the sludge is, the larger the electrostatic repulsive force among sludge particles is, therefore, the sludge is not easy to deposit and agglomerate on the surface of the anaerobic membrane, and the forming speed of a sludge cake layer is slower, thereby causing the pollution of the anaerobic membrane to be slowed down, meanwhile, the electrostatic repulsive action between the sludge particles and substances in the wastewater caused by the electric field can also weaken the thickness, the stability and the compactness of the sludge cake layer formed on the surface of the anaerobic membrane, and the applied electric field can make the structure of the sludge cake layer become looser, thereby having positive influence on the reduction of the pollution of the anaerobic membrane;
because the graphene has conductivity, the modified sponge carrier also has certain conductivity, microorganisms are attached to the biological carrier of the graphene modified sponge in the voltage-applied bioreactor, and the activity of the microorganisms can be improved by an electric field generated by the applied voltage, so that the treatment efficiency of the anaerobic membrane bioreactor is improved.
The invention has the beneficial effects that:
(1) the bioreactor is combined with a closed circuit, so that the biological activity and the treatment efficiency of the bioreactor are improved while the membrane pollution is relieved;
(2) fixing the hollow fiber membrane component in the cathode of the synthetic metal conductive net, so that the effect of an electric field and the hollow fiber membrane component is enhanced, and the reaction space is saved;
(3) the graphene modified sponge is used as a biological carrier, the particle size of sludge is increased, and the high-porosity sponge medium has high adsorption capacity on micro-pollutants and promotes the growth of the micro-organisms, so that the micro-pollutants can be removed from the wastewater;
(4) the mechanical strength of the sponge carrier is improved by utilizing the graphene modified sponge, and the sponge carrier has conductivity, so that the effect of an electric field on microorganisms can be enhanced, and the COD removal rate of a bioreactor and the yield of methane are improved;
(5) the hollow fiber membrane component is backwashed by combining the backwashing component and the biological cleaning agent, so that the hollow fiber membrane component can be more thoroughly washed, and the hollow fiber membrane component has great significance for recovering the flux of the hollow fiber membrane;
(6) the back washing process of the back washing component is carried out in an electric field formed by a closed circuit, so that pollutants in the hollow fiber membrane are more thoroughly removed, and the membrane flux is recovered;
(7) the generated methane is used as back washing gas for back washing of the back washing component, so that a strict anaerobic environment is provided for the microorganisms, and the influence of oxygen on the microorganisms is avoided;
(8) and the running state of the bioreactor is monitored in real time by adopting the PLC control system, so that the state of the bioreactor can be adjusted in time.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the cathode structure according to the present invention;
FIG. 3 is a flow chart of the present invention controlled by a PLC control system.
In the figure: 1-external power supply, 2-biogas reflux pump, 3-biogas reflux pipe, 4-water outlet pump, 5-water outlet pipe, 6-cathode (built-in hollow fiber membrane module), 7-gas flushing device, 8-anode, 9-sludge reflux pump, 10-water inlet pipe, 11-sludge discharge pipe, 12-external adjustable resistor, 13-methane collection device, 14-backwashing pipe (water pipe), 15-online pH electrode, 16-online temperature sensor, 17-chemical feeding pipe, 18-online COD sensor, 19-pressure gauge, 20-liquid flow sensor and 21-stirring paddle.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the invention easy to understand, the invention is further described with reference to the specific drawings.
Examples
After the wastewater (such as wastewater generated by livestock and poultry breeding) is pretreated and subjected to advanced oxidation treatment, the COD is removed by 90%, the wastewater enters a bioreactor from a water inlet pipe 10 at the moment, and the COD of the inlet water is more than 1000 mg/L; the water inlet pipe 10 is provided with a liquid flow sensor 20, a water inlet pump is connected with a PCL control system, the water inlet flow rate can be controlled by the PCL control system, sewage enters a bioreactor, firstly, organic matter degradation and methane accumulation are carried out through an anaerobic reaction zone, microorganisms are attached to a biological carrier of graphene modified sponge, the biological carrier provides a growth space for the microorganisms on one hand, and promotes granular anaerobic sludge to maintain the shape, on the other hand, the organic matter in the sewage is adsorbed to improve the treatment efficiency of the bioreactor, and an online pH electrode 15, an online COD sensor 16 and a temperature sensor 17 are arranged in the bioreactor so as to control the reaction state in real time;
the sewage flows upwards, passes through a cathode 6 and an anode 8, organic matters in the sewage are further removed, the sewage passes through a synthetic metal conductive net with a built-in hollow fiber membrane assembly to be used as the cathode 6 for filtration and flows out from a water outlet pipe (5), 0.6V voltage is applied between the positive electrode and the negative electrode, the voltage is applied to reduce the content of Extracellular Polymeric Substances (EPS) and Soluble Microbial Products (SMP) in the sewage passing through the cathode 6, the sewage passes through the cathode 6 for filtration, the water is discharged from the cathode 6, the sludge filtered by the cathode 6 flows back to an anaerobic reaction area through a sludge reflux pump 9, a pressure gauge 19 connected with the membrane is arranged at the water outlet so as to measure the trans-membrane pressure (TMP) value at any time and feed back the TMP value to a PLC intelligent control system, and when the TMP value exceeds 0.4MPa, the bioreactor stops water inflow;
the back washing is that under the condition of applying 0.2V voltage (the voltage is adjusted by adjusting the size of the adjustable resistor), methane generated by the reaction is pumped out from a methane collection device 13 by an air pump 2, the filter membrane is back washed for 10s, then water flow added with a biological detergent is pumped out by a water pump, and is back washed with methane together with water in a back washing water inlet pipe 14 for 30s, and finally the air pump 2 is closed and is only washed with water for 20s, so that the back washing of the membrane component is completed;
compared with the traditional anaerobic membrane bioreactor, the membrane pollution rate of the device can be reduced by 17 percent, the removal rate of COD is about 79 percent, the COD of the effluent can meet the requirements of the discharge standard of pollutants for livestock and poultry breeding (GB 18596-2001), and the sewage flows to the next reaction zone for biological nitrogen and phosphorus removal after being treated by the modified sponge auxiliary anaerobic membrane bioreactor.
One side of the bioreactor is also communicated with a sludge discharge pipe 11 and a chemical feeding pipe 7 respectively.
The bioreactor was an SBR reactor, and the reaction period was 6 hours, in which water was fed for 5 minutes, reacted for 5 hours, precipitated for 50 minutes, and discharged for 5 minutes.
It should be noted that one end of the dosing tube 7 is also communicated with a dosing pump, and the bioreactor is also provided with a water bath heating device (for example, a coil pipe for heating).
It should be noted that the methane collecting device and the gas flushing device of the present device are all the methane collecting device and the gas flushing device which are currently sold in the market, and therefore, they are not described in detail herein.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. An anti-fouling system of an anaerobic membrane bioreactor, which comprises a bioreactor and is characterized in that, a biological carrier is arranged in the bioreactor, a cathode (6) and an anode (8) are respectively arranged in the bioreactor, the external part of the bioreactor is provided with an external power supply (1) and a sliding resistor (12), the external power supply (1), the slide rheostat (12), the cathode (6) and the anode (8) form a closed circuit, a back washing component is arranged outside the bioreactor, a methane collecting device (13) is arranged outside the bioreactor, one end of the methane collecting device (13) is communicated with a methane reflux pump (2) through a pipeline, the output end of the methane reflux pump (2) is communicated with a methane reflux pipe (3), and one end of the methane reflux pipe (3) is communicated with the backwashing component.
2. The anti-fouling system of the anaerobic membrane bioreactor as claimed in claim 1, wherein the back flush component comprises a back flush pipe (4), the biogas return pipe (3) is communicated with the back flush pipe (4), the back flush pipe (4) is communicated with a four-way pipe, the four-way pipe is positioned at one side of the biogas return pipe (3), one end of the four-way pipe is communicated with a sludge return pump (9), one end of the sludge return pump (9) extends into the bioreactor and is communicated with the cathode (6), the other end of the four-way pipe also extends into the bioreactor and is communicated with a gas flushing device, the third end of the four-way pipe directly extends into the bioreactor, one end of the cathode (6) is also communicated with a water outlet pipe (5) through a guide pipe, and the water outlet pipe (5) is arranged at the outer covering part of the bioreactor, one end of the water outlet pipe (5) is communicated with a water outlet pump (4).
3. The anti-fouling system of the anaerobic membrane bioreactor as claimed in claim 2, wherein the cathode (6) comprises a synthetic metal conductive mesh containing a hollow fiber membrane module, and one end of the four-way pipe is close to the hollow fiber membrane.
4. The anti-fouling system of the anaerobic membrane bioreactor according to claim 2, wherein a pressure gauge (19) is further arranged between the water outlet pipe (5) and the water outlet pump (4).
5. The anti-fouling system of the anaerobic membrane bioreactor according to claim 3, wherein the bottom of one side of the bioreactor is communicated with a water inlet pipe (10), a liquid flow sensor (20) is arranged on the water inlet pipe (10), an online PH electrode (15), an online temperature sensor (16) and an online COD sensor (18) are sequentially arranged on the bioreactor, and the pressure gauge (19), the liquid flow sensor (20), the online PH electrode (15), the online temperature sensor (16) and the online COD sensor (18) are controlled by a PLC control system.
6. The anti-fouling system of the anaerobic membrane bioreactor according to claim 1, wherein a stirring paddle (21) is further disposed inside the bioreactor, the stirring paddle (21) comprises an impeller, and the bioreactor is further provided with a motor for driving the stirring paddle (21) to perform stirring operation.
7. The anti-fouling system of the anaerobic membrane bioreactor as claimed in claim 1, wherein the bio-carrier comprises graphene modified sponge, and the filling rate of the graphene modified sponge is 19.5% -20.5%.
8. The anti-fouling system of the anaerobic membrane bioreactor as claimed in claim 5, wherein the graphene modified sponge is prepared by mixing a reticular porous polyester-polyurethane sponge with graphene, and the specific preparation process is as follows:
s1, taking the density of the reticular porous polyester-polyurethane sponge as 30 kg/m3Cutting the reticular porous polyester-polyurethane sponge into pieces with the diameter of 20 multiplied by 20mm, wherein the specific surface area of the reticular porous polyester-polyurethane sponge is 0.846m2/g；
And S2, adding the graphene powder into the mixer, and stirring the graphene powder by an impeller on a stirring paddle (21) to help the graphene powder to enter the reticular porous polyester-polyurethane sponge.
9. The anti-fouling system of the anaerobic membrane bioreactor as claimed in claim 1, wherein the adjustment range of the slide rheostat (12) is 10 Ω -50 Ω, and the closed circuit is made as follows:
s1, the manufacturing process of the cathode (6) is as follows:
s1.1, rolling the synthetic metal conductive net into a cylinder shape, wherein the diameter of the cylinder shape is smaller than that of the hollow fiber membrane component;
s1.2, screwing the hollow fiber membrane component into the metal mesh cylinder, and then fastening the metal mesh and the hollow fiber membrane component by using metal wires;
s2, the manufacturing process of the anode (8) is as follows:
using a surface area of 0.24 m2The carbon felt of (2) is used as an anode (8), and a metal wire is used to connect the metal mesh and the carbon felt for an external power supply.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113800628A (en) * | 2021-10-22 | 2021-12-17 | 中山大学 | Dosing backwashing method and system for retarding Membrane Bioreactor (MBR) membrane pollution by utilizing in-situ gas production |
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| CN108191147A (en) * | 2017-12-29 | 2018-06-22 | 武汉恒通源环境工程技术有限公司 | A kind of Integral low-energy membrane bioreactor |
| CN111153506A (en) * | 2019-09-23 | 2020-05-15 | 北京工业大学 | Anaerobic electrochemical membrane bioreactor and water treatment method thereof |
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| CN113800628A (en) * | 2021-10-22 | 2021-12-17 | 中山大学 | Dosing backwashing method and system for retarding Membrane Bioreactor (MBR) membrane pollution by utilizing in-situ gas production |
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