CN110756041A - Electro-bio-trickling filter for treating volatile organic compounds - Google Patents

Electro-bio-trickling filter for treating volatile organic compounds Download PDF

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CN110756041A
CN110756041A CN201911050611.6A CN201911050611A CN110756041A CN 110756041 A CN110756041 A CN 110756041A CN 201911050611 A CN201911050611 A CN 201911050611A CN 110756041 A CN110756041 A CN 110756041A
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unit
cathode
anode
volatile organic
electro
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远野
陈丽娜
陈天明
杨百忍
丁成
王爱杰
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Yangcheng Institute of Technology
Yancheng Institute of Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/84—Biological processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/95—Specific microorganisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/93—Toxic compounds not provided for in groups B01D2257/00 - B01D2257/708
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/812—Electrons
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention discloses an electro-biological trickling filter for treating volatile organic compounds, which comprises a spraying system, a microbial filler system and a microbial electro-catalysis system, wherein the spraying system comprises organic waste liquid and inorganic culture solution and a spraying device; the microbial filler system is arranged in the trickling filter and comprises ceramsite and a bearing plate; the microbial electro-catalysis system comprises a unit cathode, a cathode lead, a discharge device, an anode lead, a unit anode and a gas-sensitive resistor. Compared with the prior art, the invention provides the electro-bio-trickling filter for efficiently removing the chlorinated volatile organic compounds. The trickling filter has the advantages of simple equipment, low operation and maintenance cost, no secondary pollution, high removal efficiency of chlorinated volatile organic compounds and good application prospect.

Description

Electro-bio-trickling filter for treating volatile organic compounds
Technical Field
The invention relates to the technical field of polluted gas treatment, in particular to a device for treating chlorinated volatile organic compounds by a microbial electro-catalysis enhanced biological trickling filter.
Background
At present, industrial source Volatile Organic Compounds (VOCs) are key treatment objects for national atmospheric pollution control. The chlorine-containing volatile organic compounds are taken as representatives, have toxicity, can generate a series of carcinogenic, teratogenic and mutagenic effects, and seriously affect the environmental safety and human survival. The chlorinated volatile organic compounds are easy to volatilize into the atmosphere, promote the formation of ozone and participate in photochemical reaction to form photochemical smog. It poses serious threat to human health and ecological environment. Therefore, pollution of chlorinated volatile organic compounds causes great attention of governments and environmental workers in China, and becomes an important environmental problem to be solved urgently in China.
At present, volatile organic compound treatment technologies are of two types: one is a recovery technique, including absorption, adsorption, membrane separation, etc.; another class of technologies are destruction technologies, including combustion, plasma and biological treatment technologies, among others. Wherein the biological treatment technology comprises biological filtration, biological trickling filtration and biological washing technology. For partial volatile organic compounds, the biological treatment technology has the advantages of high treatment efficiency and the like, so that the biological treatment technology quickly becomes a hot spot of domestic and foreign research. Foreign to the biological treatment technology began in 1957 with the case of treating hydrogen sulfide with soil in the united states. The domestic Wang-Tu-Shuhui uses a biological trickling filter tower filled with a special ZXO2 type filler to treat volatile organic compounds volatilized from rectification raffinate in the production of penicillin, and a good effect is achieved.
Microbial Electrolyzers (MECs) are electrochemical systems that convert electrical energy into chemical energy, a bioelectrochemical technique that uses additional electrical energy to assist microorganisms in reducing substrates. The working principle of the microbial electrolytic cell is as follows: at the unit cathode, the chlorinated volatile organic gas is reduced to remove hydrophobic groups, so that the toxicity of the chlorinated volatile organic gas is reduced, the solubility of the chlorinated volatile organic gas in water is increased, and the chlorinated volatile organic gas can be degraded by microorganisms through oxidation. At the unit anode, the electrodes catalyze the oxidative degradation of the reduction products by the microorganisms, and electrons are transferred from the anode to the cathode.
For the traditional biological trickling filtration tower to treat the chlorinated volatile organic compounds, the method has the advantages of large treatment capacity, low investment cost, capability of adjusting pH, capability of increasing nutrient substances, no secondary pollution and the like. But it has the problem of low degradation efficiency to chlorinated volatile organic compounds. In contrast, the filler layer of the biotrickling filter is improved on the basis of the original electrode material. When the chlorinated volatile organic compounds pass through the cathode of the microbial electro-catalysis system, reduction reaction occurs to achieve dechlorination effect and reduce toxicity, and the chlorinated volatile organic compounds enter the filler area and can be degraded by microorganisms, so that the treatment efficiency is improved.
Disclosure of Invention
The invention provides a novel process for treating volatile organic compounds through biocatalysis electrolysis, aiming at the problems of low biological activity, low mass transfer efficiency and the like in the conventional biological method for treating volatile organic gases.
In order to solve the technical problems, the invention adopts the technical scheme that:
an electro-biological trickling filter for treating volatile organic compounds comprises a reaction vessel, wherein the reaction vessel is of a hollow cylindrical structure and sequentially comprises a spraying layer, trickling filter tower filler ceramsite, a unit cathode, a unit anode, a nutrient solution spraying device and a nutrient solution dripping layer from top to bottom; the upper part of the reaction container is provided with a gas outlet communicated with the spraying layer, and the lower part of the reaction container is provided with a gas inlet communicated with the nutrient solution dripping layer; a nutrient solution circulating bin is arranged outside the reaction container, pipelines communicated with the spraying layer and the nutrient solution dripping layer are respectively arranged on the nutrient solution circulating bin, and organic waste liquid and inorganic culture solution is arranged in the nutrient solution circulating bin; a nutrient solution spraying device is arranged in the spraying layer, the nutrient solution spraying device is mutually connected with a pipeline of the nutrient solution circulating bin communicated with the spraying layer, and the pipeline is provided with a pump; the reactor is also provided with a cathode lead, a discharge device and an anode lead outside, one end of the cathode lead is connected with the unit cathode, the other end of the cathode lead is connected with the discharge device, one end of the anode lead is connected with the unit anode, and the other end of the anode lead is connected with the discharge device.
As a further preferable scheme, the unit cathode and the unit anode are both circular structures similar to the cross section of the reaction vessel, the unit cathode and the unit anode have the same composition structure and comprise a metal wire unit, the metal wire unit comprises a longitudinal wire and a transverse wire, and the longitudinal wire is perpendicular to the transverse wire; the two metal wire units are mutually overlapped to form a double-strand metal wire, two transverse wires in the double-strand metal wire are in a vertical state in the horizontal direction, and two longitudinal wires are mutually twisted; carbon fibers are wound on two longitudinal wires of the double-strand metal wires to form the carbon fiber metal long brush, and the carbon fiber metal long brushes are spliced with each other to form a unit cathode or a unit anode.
As a further preferable mode, the longitudinal steel wire in the unit cathode is disposed toward the unit anode, and the longitudinal steel wire in the unit anode is disposed toward the unit cathode.
As a further preferable scheme, the longitudinal wires and the transverse wires in the unit cathode are made of stainless steel, the diameters of the longitudinal wires and the transverse wires are both 1 mm, and the length of the carbon fiber of the unit cathode is 30 mm; the longitudinal wires and the transverse wires in the unit anode are made of titanium metal, the diameters of the longitudinal wires and the transverse wires are 0.5 mm, and the length of the carbon fiber of the unit anode is 30 mm.
As a further preferable scheme, the anode lead is provided with a gas-sensitive resistor.
Compared with the prior art, the invention has the beneficial effects that: the method has the characteristics of a bioelectrochemical method, low cost, no secondary pollution and high removal efficiency; the electrode material adopted by the invention is a cheap carbon fiber brush, the specific surface area is large, and the biological film forming effect is good; the anode and the cathode of the biocatalytic electrolysis system are distributed up and down along the diffusion direction of the waste gas, the cathode is arranged above the anode, and the reduction dechlorination capability of the cathode is fully exerted; the electrode adopted by the catalytic electrode degradation system can be directly inserted into the electrode on the traditional trickling filter tower and the position of the electrode in the process system can be adjusted according to the requirement, so that the catalytic electrode degradation system has more flexibility; according to the invention, the electrode material is used for modifying the filler layer of the biological trickling filter, the configuration and arrangement mode of the electrode filler are optimized, and the biocatalytic electrolysis module with high activity is constructed.
Due to the structural design, the invention can obviously improve the degradation efficiency of the traditional biological trickling filtration tower on chlorinated volatile organic compounds, and has good application prospect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a view of a unit structure of a wire;
FIG. 3 is a manufacturing process of a bifilar metal wire;
FIG. 4 is a manufacturing process of a carbon fiber metal long brush;
FIG. 5 is a process for fabricating a unit cathode or a unit anode;
FIG. 6 is a plan view of a unit cathode or a unit anode;
FIG. 7 is a graph showing the inlet gas concentration and outlet gas concentration of chlorophenol when chlorophenol gas is treated by using the trickling filter of the present invention and a conventional trickling filter, respectively;
FIG. 8 is a schematic diagram showing the removal efficiency of chlorophenol when chlorophenol gas is treated separately using the trickling filter of the present invention and a conventional trickling filter;
the device comprises a unit cathode, a unit anode, a cathode lead, a discharge device, a unit anode, a unit cathode lead, a discharge device, a nutrient solution spraying device, a liquid-sensitive resistor, an organic waste liquid and inorganic culture solution, a trickling filter filler ceramsite, a gas-sensitive resistor, a gas inlet, a gas outlet, a longitudinal wire, a transverse wire, a double-strand metal wire, a carbon fiber metal long brush, a gas-sensitive resistor, a gas inlet, a gas outlet, a longitudinal wire, a transverse wire, a double-strand metal wire, a carbon fiber metal long brush.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, an electro-bio-trickling filter for treating volatile organic compounds, which comprises a spraying system, a microbial electro-catalytic system and a microbial filler system;
the spraying system comprises an organic waste liquid inorganic culture solution 7 and a nutrient solution spraying device 6;
the microbial electro-catalysis system comprises a unit cathode 1, a cathode lead 2, a discharge device 3, an anode lead 5, a unit anode 4 and a gas-sensitive resistor 9, wherein one end of the cathode lead 2 is connected with the unit cathode 1, the other end of the cathode lead is connected with the discharge device 3, one end of the anode lead 5 is connected with the unit anode 4, the other end of the anode lead is connected with a power supply device 3, the unit cathode 1 is connected with the negative electrode of the power supply device 3 through the cathode lead 2, the unit anode is connected with the positive electrode of the power supply device 3 through the anode lead 5, the power supply device 3 provides 1.2V of external voltage, and the voltage can be adjusted by using the gas-sensitive;
the microbial filler system is arranged in the trickling filter, a unit anode and a unit cathode of the microbial electro-catalysis system are inserted into a filler layer of the trickling filter, ceramsite is selected as the filler in the microbial filler system to provide a carrier for the growth of microbes, the unit anode is arranged below, the unit cathode is arranged above, an anode lead 5 is provided with a gas-sensitive resistor 9, and the unit anode 5 is provided with a domesticated microbial membrane.
The unit cathode 1 and the unit anode 4 are both circular structures similar to the cross section of the reaction container, the unit cathode 1 and the unit anode 4 have the same composition structure and comprise a metal wire unit, the metal wire unit consists of a longitudinal wire 12 and a transverse wire 13, and the longitudinal wire 12 is vertical to the transverse wire 13; the two metal wire units are mutually overlapped to form a double-strand metal wire 14, two transverse wires 13 in the double-strand metal wire 14 are in a vertical state in the horizontal direction, and two longitudinal wires 12 are mutually twisted; two longitudinal wires 12 in the double-strand metal wire 14 are wound with carbon fibers 15 to form carbon fiber metal long brushes 16, the carbon fiber metal long brushes 16 are spliced with one another to form the unit cathode 1 or the unit anode 4, specifically, the unit cathode 1 and the unit anode 4 are both in a circular net structure with the diameter of 40mm, and the unit cathode 13 is connected with the transverse wires 13 of other surrounding carbon fiber metal long brushes 16.
The longitudinal wires 12 and the transverse wires 13 in the unit cathode 1 are made of stainless steel materials, the diameters of the longitudinal wires and the transverse wires are 1 mm, and the length of the carbon fiber 15 of the unit cathode 1 is 30 mm; the longitudinal wires 12 and the transverse wires 13 in the unit anode 4 are made of titanium metal, the diameters of the longitudinal wires and the transverse wires are 0.5 mm, and the length of the carbon fiber 15 of the unit anode 4 is 30 mm; the unit cathode 1 and the unit anode 4 are twisted in this way, increasing the specific surface area and having good conductivity.
The reaction vessel is sequentially provided with a spraying layer, a trickling filtration tower filler ceramsite 8, a unit cathode 1, a unit anode 4, a nutrient solution spraying device 6 and a nutrient solution dripping layer from top to bottom; the upper part of the reaction container is provided with a gas outlet 11 communicated with the spraying layer, the lower part of the reaction container is provided with a gas inlet 10 communicated with the nutrient solution dropping layer, and the bottom of the trickling filtration tower filler ceramsite 8 can be provided with a supporting plate for fixing.
The unit anode 4 and the unit cathode 1 are inserted into the bottom of the filler layer of the trickling filter, the filler layer of the biological filter tower is modified by using electrode materials, the function of the original filler is kept, electrodes are introduced on the original basis, the configuration and the arrangement mode of the electrodes are optimized, and the biocatalytic electrolysis module with high activity is constructed.
The distance between the unit anode 4 and the unit cathode 1 is less than 20 mm.
The organic matter treating method of the invention comprises the following steps:
the chlorinated volatile organic compounds enter the electro-bio-trickling filter from the bottom of the tower, and when gas diffuses to the cathode, the chlorinated volatile organic compounds are subjected to reduction reaction at the cathode to achieve the purposes of dechlorination and detoxification, and then enter the filler area and are contacted with a wet biological film on the surface of the ceramsite, the chlorinated volatile organic compounds are adsorbed by the biological film and can be further subjected to oxidative degradation by microorganisms, and the purified gas is discharged from the top of the tower. The circulating liquid is sprayed downwards from the top of the tower, flows downwards from top to bottom in the packing module, is discharged from the bottom of the tower and is recycled. And (3) periodically adding nitrogen and phosphorus nutrient solution into the circulating solution storage tank, and arranging an aeration head for aeration so as to maintain the normal growth and reproduction activities of microorganisms. The microorganism used in the experiment is taken from a certain domestic sewage treatment plant, is acclimated by using chlorophenol, is directly added into a circulating liquid tank, and is sprayed on ceramsite to carry out biofilm culturing. In addition, an organic substance such as acetic acid is added to the circulating liquid as an electron donor to start the electrolysis. The power supply device is used for supplying 1.2V stable voltage to the power supply device, and the power supply device runs for 40 d.
At the initial stage of starting, microbial strains domesticated by tested organic matters are inoculated in the circulating liquid, sprayed from the top of the tower and flows down in the reverse direction with gas entering the trickling filter, and the microorganisms utilize organic substances dissolved in the liquid phase to carry out metabolic propagation and attach to the surface of the filler to form a microbial film, thereby completing the biofilm formation process. Organic matters and oxygen in the gas phase main body enter the microbial film through diffusion and are utilized by microbes, and metabolic products enter the gas phase main body through diffusion and are discharged.
The biological trickling filter tower device is made of organic glass material with the parameters of phi 80 mm multiplied by 1100 mm and is divided into four modules, the height of filler of each module is 180 mm, the filler is ceramsite, and the packing density of the filler is 1.2 (g.cm)-3) The porosity is 55-58%, and the specific surface area is 800 (m)2·m-3）。
Experimental procedure
Two sets of the same bio-trickling filter devices are selected, and the same ceramsite is filled as a filler. The two groups of air inlets can be simultaneously fed by adopting a parallel air inlet mode, and a valve can be added in front of the parallel air inlet pipeline to adjust the flow of air. Two sampling points are respectively arranged at the gas inlet and the gas outlet of each group, and two groups of inlet and outlet gases are intermittently sampled by two same non-carbon brush samplers. One of the groups was used as an experimental group, and a group of electrodes was inserted and supplied with a stable voltage of 1.2V by a power supply device. Two groups served as control experiments.
The specific method comprises the following steps:
the chlorophenol gas adopts a dynamic preparation method, the chlorophenol and air are compressed together and enter a buffer bottle to be fully mixed, so that the chlorophenol and the air are uniformly mixed, and after the flow of the chlorophenol is regulated by a valve, the two devices are simultaneously fed with air in a parallel connection mode. The chlorophenol gas enters the biological trickling filter from the bottom of the tower, when the chlorophenol gas diffuses to the cathode, the chlorophenol gas is subjected to reduction reaction at the cathode to achieve dechlorination and detoxification effects, and then enters the filler area to be in contact with a wet biological membrane on the surface of the ceramsite, the chlorophenol gas is firstly adsorbed by the biological membrane and then can be subjected to oxidative degradation by microorganisms, and the purified gas is discharged from the top of the tower. The circulating liquid is sprayed downwards from the top of the tower, flows downwards from top to bottom in the packing module, is discharged from the bottom of the tower and is recycled. In addition, an organic substance such as acetic acid is added to the circulating liquid as an electron donor to start the electrolysis. The microorganism used in the experiment is taken from a certain domestic sewage treatment plant, is acclimated by using chlorophenol, is directly added into a circulating liquid tank, and is sprayed on ceramsite to carry out biofilm culturing. After the above treatment, samples were taken every day for 40 days for both sets of equipment. The sample concentration was measured and the data obtained were plotted in fig. 7 and fig. 8.
It is further noted that the microbial anode can acclimate the anode biological membrane with electrode activity by an electroactive microbe enrichment potential before installation, namely biofilm formation treatment, and the specific steps are as follows:
and (3) adding the acclimated sludge into a working electrode chamber of the electrochemical reactor which is sterilized under high pressure by adopting a microorganism three-electrode mode and taking Ag/AgCl as a reference electrode, wherein the sludge is taken from a local sewage treatment plant. The concentration of the inlet chlorophenol is 60-380 mg.m-3The pH value of the circulating liquid is 6.7 to 7.1, and the spraying density is 1.4 to 2.1 m3·( m2·h)-1Gas flow of 0.5 m3·h-1And quantitatively detecting the change of the concentration of the discharged chlorophenol every day under the condition of externally adding 1.2V of voltage, and observing the film formation condition on the surface of the anode. The anaerobic sludge was changed every day for the first 5 days, and then cultured with pure simulated chlorophenol gas. It is emphasized that the working electrode chamber is continuously aerated and the temperature is maintained at 30 ℃ throughout the process. When the removal rate of the chlorophenol reaches more than 85%, the film formation is successful.
As shown in fig. 7 and 8, when the operation 1 d is performed, the removal efficiency of the parachlorophenol of the electro-bio-trickling filter is 60%, the biofilm formation is started at the moment, and the complete biofilm is not formed on the ceramsite; the removal efficiency of the chlorophenol is continuously improved to reach 94% in the 2 nd to 7 th days, and a biological film is gradually formed on the surface of the ceramsite in the process; the removal efficiency of chlorophenol at 9 th to 12 th days basically fluctuates about 93%; at 13 d, N, P nutrient substances are added into the circulating liquid tank; the concentration of chlorophenol is maintained at 100-250 mg-m in the 14 th-28 th day-3In between, there was a slow fluctuation in removal efficiency, but all were maintained at 91% and above. Wherein the efficiency is as high as 99% after about 19 d, and at the moment, the film formation is basically finished; the chlorophenol concentration has rapid change from 63 mg.m in the 29 th to 34 th days-3Increased to 380 mg.m-3The efficiency is reduced to 85%; in 35 th-40 th days, the chlorophenol removal rate slowly changes along with the change of the chlorophenol concentration; the highest removal efficiency of parachlorophenol gas of the traditional biological trickling filter can only reach 39 percent; the above data demonstrate that the electro-bio-trickling filter has higher removal efficiency for chlorophenol gas and better stability for large changes in chlorophenol concentration.
This embodiment has certain effects and theories supporting the way:
firstly, a unit cathode can strengthen and degrade partial insoluble chlorinated volatile organic compounds; the chlorinated volatile organic compounds are diffused to a unit cathode to be reduced, so that the purposes of dechlorination and detoxification are achieved, and the chlorinated volatile organic compounds enter a filler area and can be further degraded by microorganism oxidation;
secondly, the unit cathode material is a stainless steel wire carbon fiber brush; the stainless steel wire mesh has the characteristics of low cost, easiness in manufacturing and the like, and the carbon fiber has higher specific surface area and good conductivity;
the embodiment relates to an electrochemical system for converting electric energy into chemical energy by a microbial electrolytic cell, and the method has the advantages of ingenious conception and great innovation;
fourthly, one group of electrodes and the filler in the invention are a module, and the chloro-substituted volatile organic compounds are subjected to modularized degradation.
As can be seen from FIGS. 7 and 8, the degradation of chlorophenol gas by using an electro-bio-trickling filter for treating volatile organic compounds is significantly improved, and the degradation efficiency has good stability under the fluctuation of different concentrations.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. An electro-bio-trickling filter for treating volatile organic compounds, comprising: the reaction container is of a hollow cylindrical structure and sequentially comprises a spraying layer, a trickling filtration tower filler ceramsite (8), a unit cathode (1), a unit anode (4), a nutrient solution spraying device (6) and a nutrient solution dripping layer from top to bottom; the upper part of the reaction container is provided with a gas outlet (11) communicated with the spraying layer, and the lower part of the reaction container is provided with a gas inlet (10) communicated with the nutrient solution dropping layer; a nutrient solution circulating bin is arranged outside the reaction container, pipelines communicated with the spraying layer and the nutrient solution dripping layer are respectively arranged on the nutrient solution circulating bin, and organic waste liquid and inorganic culture solution (7) is arranged in the nutrient solution circulating bin; a nutrient solution spraying device (6) is arranged in the spraying layer, the nutrient solution spraying device (6) is mutually connected with a pipeline of the nutrient solution circulating bin communicated with the spraying layer, and the pipeline is provided with a pump; the reactor is also provided with a cathode lead (2), a discharge device (3) and an anode lead (5) outside, one end of the cathode lead (2) is connected with the unit cathode (1), the other end of the cathode lead is connected with the discharge device (3), one end of the anode lead (5) is connected with the unit anode (4), and the other end of the anode lead is connected with the discharge device (3).
2. An electro-bio-trickling filter for treating volatile organic compounds according to claim 1, wherein: the unit cathode (1) and the unit anode (4) are both circular structures similar to the cross section of the reaction container, the unit cathode (1) and the unit anode (4) are the same in composition structure and comprise metal wire units, each metal wire unit consists of a longitudinal wire (12) and a transverse wire (13), and the longitudinal wire (12) is perpendicular to the transverse wire (13); the two metal wire units are mutually overlapped to form a double-strand metal wire (14), two transverse wires (13) in the double-strand metal wire (14) are in a vertical state in the horizontal direction, and two longitudinal wires (12) are mutually twisted; carbon fibers (15) are wound on two longitudinal wires (12) in the double-strand metal wire (14) to form carbon fiber metal long brushes (16), and a plurality of carbon fiber metal long brushes (16) are spliced with one another to form a unit cathode (1) or a unit anode (4).
3. An electro-bio-trickling filter for treating volatile organic compounds according to claim 2, wherein: the longitudinal steel wire (12) in the unit cathode (1) is arranged towards the unit anode (4), and the longitudinal steel wire (12) in the unit anode (4) is arranged towards the unit cathode (1).
4. An electro-bio-trickling filter for treating volatile organic compounds according to claim 2, wherein: the longitudinal wires (12) and the transverse wires (13) in the unit cathode (1) are made of stainless steel materials, the diameters of the longitudinal wires and the transverse wires are 1 mm, and the length of the carbon fibers (15) of the unit cathode (1) is 30 mm; the longitudinal wires (12) and the transverse wires (13) in the unit anode (4) are made of titanium metal, the diameters of the longitudinal wires and the transverse wires are 0.5 mm, and the length of the carbon fibers (15) of the unit anode (4) is 30 mm.
5. An electro-bio-trickling filter for treating volatile organic compounds according to claim 1, wherein: and the anode lead (5) is provided with a gas-sensitive resistor (9).
CN201911050611.6A 2019-10-31 2019-10-31 Electro-bio-trickling filter for treating volatile organic compounds Pending CN110756041A (en)

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CN114870616A (en) * 2022-06-10 2022-08-09 盐城工学院 Electrobiological-Fenton-like integrated reactor for treating volatile organic waste gas
CN117018861A (en) * 2023-08-25 2023-11-10 威海蓝创环保设备有限公司 Photocatalytic treatment process for VOC-containing waste gas
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Publication number Priority date Publication date Assignee Title
CN113893660A (en) * 2021-10-22 2022-01-07 广东省科学院微生物研究所(广东省微生物分析检测中心) Device and method for flue gas denitration by using membrane-free continuous flow bioelectrochemical system
CN114870616A (en) * 2022-06-10 2022-08-09 盐城工学院 Electrobiological-Fenton-like integrated reactor for treating volatile organic waste gas
CN117018861A (en) * 2023-08-25 2023-11-10 威海蓝创环保设备有限公司 Photocatalytic treatment process for VOC-containing waste gas
CN117065518A (en) * 2023-08-25 2023-11-17 威海蓝创环保设备有限公司 Organic waste gas concentration mineralization system

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