CN103811791A - Bioelectrochemistry device and bioelectrochemistry method for extracting reducing energy from waste and wastewater - Google Patents
Bioelectrochemistry device and bioelectrochemistry method for extracting reducing energy from waste and wastewater Download PDFInfo
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- CN103811791A CN103811791A CN201410042586.8A CN201410042586A CN103811791A CN 103811791 A CN103811791 A CN 103811791A CN 201410042586 A CN201410042586 A CN 201410042586A CN 103811791 A CN103811791 A CN 103811791A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/16—Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
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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
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention relates to a bioelectrochemistry device and a bioelectrochemistry method for extracting reducing energy from waste and wastewater. The device comprises a positive electrode chamber serving as a reactor, a conductor wall, a membrane, a positive electrode, an external circuit and a load or an external power supply, wherein the conductor wall is a negative electrode of the reactor; the negative electrode serving as a reactor main body structure or an independent negative electrode is embedded into the positive electrode chamber. A plurality of the devices can be connected in parallel or in series to form an integrated device, so that the treatment capability is improved. The device can work under a biological fuel battery or biological electrolytic tank mode or alternately runs in the two modes; the pH value of the wastewater is controlled to be 4-9 in a working process.
Description
Technical field
The invention belongs to waste water reclaiming and recovery energy technical field, be specifically related to a kind of passing through discarded object and wastewater anaerobic oxidation, and will go back the bioelectrochemistry device and method of proper energy for generation of negative oxygen ion, hydrogen and methane.
Technical background
In industrial and agricultural production and people's lives process, all can discharge a large amount of discarded object and waste water containing various organic and inorganic reductive pollutants.In these discarded objects and waste water, all contain a large amount of also proper energies with reduction-state material form, as all kinds of organic pollutions of the discharges such as the oil from natural cellulose, carbohydrate, lipid, protein and industrial processes process, pharmacy, chemical industry, food processing, also comprise the inorganic pollution such as ammonia nitrogen, sulfide.Also proper energy in these discarded objects, waste water, the form that only has part biological matter discarded object and high concentrated organic wastewater to produce the biomass energies such as methane by fermentation reclaims.Most discarded objects, waste water, by terminal processes means, are mainly carbon dioxide, water or nontoxic oxidation state material by aerobic oxidation.These processing methods need blast aeration, biological rotating disk etc. to provide a large amount of oxygen as electron acceptor, the reducing substances in oxidized waste water, and oxygen supply expense accounts for a greater part of of biological wastewater treatment cost.
Along with the shortage of the energy, become the focus of international bio energy field research take microbiological fuel cell, biological electrolytic cell as the bioelectrochemistry system of representative.It can pass through microorganism catalysis, and electronics is passed to electrode by decomposition discarded object, waste water, reclaims also proper energy wherein with electrogenesis, the modes such as hydrogen, organic synthesis of producing.At present, obtained major progress in research fields such as electrogenesis microbe, the transmission of born of the same parents' exoelectron, battery structure, electrode materials, the electron recovery rate of organic carbon is up to 96.8%(AEM, 2003,69,1548 – 1555).In order further to reduce energy consumption, to optimize structure of reactor, obtained scholars' attention take air cathode as main single chamber biological fuel cell, China's publication (200910153236.8) has been described the manufacture method of the air cathode of non-metal catalyst, can reduce battery cost.China's publication (200510079759.4) has been described respectively air cathode fuel cell structure and the application at aspects such as processing waste water and electrogenesis thereof with (200810063876.5).But air cathode is mostly made complexity, need to be carried the materials such as noble metal catalyst and proton exchange membrane such as platinum, is difficult to make large-sized battery structure.
Biological electrolytic cell a large amount of studied persons is used for carrying out the auxiliary bio-hydrogen research of electricity, and aspect cathode material research, under applying electrical potential 0.6V condition, stainless steel cathode produces hydrogen can reach 1.7m
3/ m
3.d(current density 188A/m
3) (Environ.Sci.Technol.2009,43,2179 – 2183).On MEC basis, traditional double chamber, single chamber produces hydrogen research without film MEC and also obtains large progress, and under applying electrical potential 0.8V condition, single chamber reaches 3.12m without film MEC hydrogen-producing speed
3/ m
3.d(current density reaches 292A/m
3), electron recovery rate has reached 98%(Environ.Sci.Technol.2008,42,3401 – 3406).Utilize the screen electrode of titanium/ruthenium alloy for the biological electrolysis of residual active sludge, 1.4 and the applying electrical potential of 1.8V under, the anaerobic fermentation that the productivity ratio of hydrogen and methane does not add electromotive force exceeds respectively 1.7-5.2 times, doubly (International Journal of Hydrogen Energy of 11.4-13.6,2013,38,1342-1347).Utilize the methanogenic research in bioelectrochemistry system reducing carbon dioxide next life of biological-cathode to have been reported (WO2009/155587A2).The method is used biological-cathode as catalyst, just can synthesizing methane without hydrogen and organic interpolation.By biological anode and biological-cathode coupling, successfully utilize the also proper energy of sulfides from wastewater to carry out synthesis of acetic acid (EST, 2013,47,568-573).
At present, about biological electrolysis and the synthetic research of bioelectricity rest on the laboratory scale of several milliliters-hundreds of milliliters mostly.Main cause is the basic structure of the two chambers biological electrolytic cell of bioelectrochemistry system based on traditional, although obtain large progress in fields such as battery structure optimization, amberplex, year platinum electrode catalysis in recent years, but due to the defect such as gas, iontophoretic injection of film, cause the course of reaction between bioelectrochemistry system the anode chamber and the cathode chamber to be subject to phase mutual interference.In addition, be limited by the restriction of amberplex, electrode material cost, structure of reactor intensity and energy conversion efficiency, be MFC or be all difficult to take MEC as basic bioelectrochemistry system amplify and scale apply.
Summary of the invention
In order to utilize the also proper energy in discarded object and waste water, solve existing bioelectrochemistry device and be difficult to the problems such as amplification due to structure, materials limitations, the technical problem to be solved in the present invention is to provide a kind of bioelectrochemistry device that extracts discarded object, wastewater reduction energy, the also proper energy that the anaerobic oxidation of discarded object, waste water can be produced by this device is synthetic for negative oxygen ion, hydrogen, methane, realizes resource and the recovery energy of discarded object, waste water.The present invention can be widely used in all types of industries waste water, sanitary wastewater, heavy metal wastewater thereby and excess sludge and other agriculturals, trade waste process field.
For solving the problems of the technologies described above, the present invention has taked following technical scheme:
The invention provides a kind of also bioelectrochemistry device of proper energy that extracts from discarded object and waste water, it is characterized in that, described device comprises the anode chamber (1) as reactor, conduction wall (2), barrier film (3), anode (5), external circuit, and load (6) or additional power source (7); Conduction wall (2) is the negative electrode of reactor, and negative electrode is embedded in anode chamber as reactor body structure or as independent negative electrode.
Further, during as reactor body structure, form sealing anode chamber as the negative electrode of conduction wall, negative electrode outside contacts with external environment air, is close to inside negative electrode with barrier film and anode; When negative electrode is embedded into as absolute construction in anode chamber (1), negative electrode inner side communicates with the surrounding air of circulation, and negative electrode outside is close to barrier film and anode, and whole anode chamber is in sealing state.Both also rectangular configuration or arbitrary configurations of cylindrical structural of anode chamber (1), the negative electrode of absolute construction can be pipeline or rectangular configuration or arbitrary configuration.
Further, can (1) establish water inlet (9), delivery port (10) and gas outlet in anode chamber, and the gas reservoir (8) being connected with gas outlet.
Further, can between barrier film (3) and anode (5), be provided with anode current collector net (4), adopt but be not limited to the metallic conduction web material such as stainless steel, titanium, alloy.
Further, the negative electrode of reactor, adopts but is not limited to the electric conducting material making such as metallic conduction material, conductivity ceramics such as stainless steel, iron, aluminium, copper, lead of conduction; Its anode (5) adopts but is not limited to the carbon materialses such as carbon felt, carbon paper, carbon cloth, agraphitic carbon fiber, active carbon and makes.
Further, can fill but be not limited to the fillers such as wire, net such as activated carbon granule, agraphitic carbon fiber, stainless steel, titanium in its anode chamber (1) and build three-dimensional anode.
Further, barrier film (3) adopts but is not limited to the materials such as nonwoven fabrics, asbestos fibre, amberplex, synthetic fibers and makes.
Further, additional power source (7) adopts stabilized voltage power supply or potentiostat.
Further, form while moving under biological electrolysis pool mode at additional power source (7), negative electrode outside completely cuts off with insulating material and air.
Further, according to the processing load of the effective volume of bioelectrochemistry device and discarded object and waste water, processing engineering for 1 can be combined by two to hundreds of bioelectrochemistry reactor serial or parallel connections.
Further, when two to hundreds of bioelectrochemistry reactor serial or parallel connection combinations, the reactor that conduction wall builds both can do assistant anode chamber, shared a cathode chamber contacting with surrounding air (referring to accompanying drawing 3).
Further, the reactor that conduction wall builds also can be used as independent cathode chamber, and the integral reactor that other materials builds is as a shared anode chamber (referring to accompanying drawing 4).
Bioelectrochemistry device of the present invention, stabilized voltage power supply or potentiostat can be a bioelectrochemistry reactor applying electrical potential, can be also two to hundreds of bioelectrochemistry reactor applying electrical potentials by the mode of being connected in parallel.
Bioelectrochemistry device of the present invention, can be by the facility such as blender, circulating pump to circulating in installing and stirring.
The operation principle of bioelectrochemistry device of the present invention is as follows:
Device is in the time that external circuit connects load (6), operate under fuel cell pattern, waste water enters anaerobic oxidation reactor (anode chamber), anode biomembrane is delivered to anode the electronics of discarded object and wastewater reduction contact scar thing anaerobic oxidation decomposition generation, and by external circuit, electronics is delivered to synthetic negative oxygen ion in the outer surrounding air of conduction wall (negative electrode).Reductive pollutants in discarded object, waste water is discharged after oxidation.
Device is in the time that external circuit connects additional power source (7), operate under biological electrolysis pool mode, waste water enters anaerobic oxidation reactor (anode chamber) by water inlet, the electronics that anode Bacterium of biofilm produces the reductive pollutants anaerobic oxidation in discarded object and waste water is delivered to anode, part electronics is delivered to electronics by external circuit synthetic negative oxygen ion in the surrounding air in conduction wall (negative electrode) outside, another part electronics is delivered in solution by external circuit and conduction wall (negative electrode), the proton that anode migration is come is reduced to hydrogen, or pass through methanogen floras, by electronics/proton, hydrogen, CO
2further synthesize methane, gas reservoir (8) can be used for storing the hydrogen or the methane that produce.Reductive pollutants in discarded object, waste water is discharged after oxidation.
The invention still further relates to a kind of also bio-electrochemical process of proper energy that extracts from discarded object and waste water, it is characterized in that, utilize the device of the invention described above by discarded object and wastewater anaerobic oxidation, and will go back the method for proper energy for generation of negative oxygen ion, hydrogen and methane.According to the reducing substances composition of discarded object and waste water, the microorganism species of the anaerobic oxidation that anode chamber's Anodic adheres to is also different, and microorganism species includes but not limited to heterotrophic microorganism flora, autotrophic microbe flora etc.Can be under biological fuel cell or biological electrolysis pool mode independent operating, or two kinds of mode alternate runs, its also proper energy derive from microbe and participate in discarded object and anaerobic waste water respiratory metabolism.
Heterotrophic microorganism flora of the present invention includes but not limited to Pseudomonas, klebsiella, Alcaligenes, Bacillus, Bacillus brevis, Aeromonas, Comamonas, Geobacter, the combination in any of one or more kinds of Shewanella etc.
Autotrophic microbe flora of the present invention includes but not limited to ammoxidation flora Nitrosomonas, Nitrosococcus, Nitrosospira, Nitrosolobus, Nitrobacter, the bacterium in Nitrospira etc.; Autotrophy Thiobacillus group is as the Thiobacillus ferrooxidans of Thiobacillus, Thiobacillus thiooxidans, Thiobacillusdenitrificans etc.; And some facultative autotrophic microorganism species are as Pseudomonas, the combination in any of one or more kinds in Sulfolobus etc.
The microorganism species of synthesizing methane of the present invention includes but not limited to Methanobacterium, Methanocorpusculum, Methanococcus, Geobacter, Methanobrevibacter, Methanosphaera, Methanomicrobium, Methanoculleus, the combination in any of one or more kinds in Methanosarcina and Methanococcoides etc.
Further, in anode chamber's discarded object and wastewater anaerobic oxidation process, control pH value between 4 to 9.
Further, during with stabilized voltage power supply applying electrical potential, the electromotive force between anode and negative electrode is between 100mv-2000mv; While adopting potentiostat applying electrical potential, control anode potential at-400mv-+1200mv(VS.Ag/AgCl) between.Stabilized voltage power supply or potentiostat can be a bioelectricity synthesis reactor applying electrical potential, can be also two to hundreds of bioelectricity synthesis reactor applying electrical potentials by the mode of being connected in parallel.
Compared with traditional waste water treatment and biological fuel cell, biological electrolytic cell, tool of the present invention has the following advantages:
(1) bioelectrochemistry reactor provided by the invention also proper energy in discarded object and waste water can have been avoided for negative oxygen ion, hydrogen and methane synthetic by modes such as anaerobic oxidation and electronics transmission and also proper energy by oxygen expenditure, realized discarded object, wastewater reduction can resource and energy.
(2) bioelectrochemistry device provided by the invention, in can effectively solving, the also proper energy of low concentration pollution waste water is extracted a difficult problem, in synthesis of chemicals, has realized the terminal processes of waste water.
(3) the present invention forms a bioelectrochemistry reactor by conduction wall (negative electrode), barrier film and anode (or anode current collector net), can guarantee the synthetic anode chamber's anaerobic oxidation process that do not affect of negative oxygen ion of cathode chamber.
(4) when the present invention moves under biological electrolysis pool mode, the proton of discarded object in anode chamber and wastewater anaerobic oxidation accumulation can be synthesized to hydrogen and methane at negative electrode lower than producing under hydrogen electromotive force, can effectively improve the proton accumulation of traditional biological electrochemical reactor anode chamber and the inhibition that low pH brings microbial activity.
(5) bioelectrochemistry reactor negative electrode of the present invention tightly fits together by barrier film and anode, more existing biological electrolytic cell has less pole span, barrier film can adopt inexpensive nonwoven fabrics, asbestos fibre etc., can significantly reduce the Master Cost because using amberplex to bring.Reactor body structure is made by electric conducting materials such as stainless steels, and its structural strength can guarantee effective amplification.
Accompanying drawing explanation:
Accompanying drawing 1: the structure drawing of device of negative electrode during as reactor body structure
Accompanying drawing 2: negative electrode embeds the structure drawing of device in anode chamber as independent negative electrode
Accompanying drawing 3: multiple devices of sharing cathode chamber are in series or in parallel to form the structure chart of integrating device
Accompanying drawing 4: multiple devices of sharing cathode chamber are in series or in parallel to form the structure chart of integrating device
Wherein: (1) anode chamber; (2) conduction wall; (3) barrier film; (4) anode current collector net; (5) anode; (6) load; (7) additional power source, (8) gas reservoir, (9) water inlet, (10) delivery port.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but be not limited to the following example.
Embodiment 1: negative electrode is as the bioelectrochemistry device of synthetic negative oxygen ion, hydrogen and methane of agent structure
Using negative electrode as agent structure, building extraction discarded object and wastewater reduction can be for the synthesis of the bioelectrochemistry device of negative oxygen ion, hydrogen and methane, it comprises the anode chamber 1 as reactor, conduction wall 2, barrier film 3, anode current collector net 4 and anode 5, additional power source 7 or load 6 and external circuit.Anode chamber 1 establishes the gas reservoir 8 that water inlet 9, delivery port 10 and gas outlet connect.Anode chamber 1 seals, for the anaerobic oxidation of discarded object and waste water.Anode chamber is built by stainless steel cylindraceous, and stainless steel wall is simultaneously as negative electrode, and negative electrode outside contacts with surrounding air, there is no independently cathode chamber.Negative electrode inner side is close to barrier film, anode current collector net and anode.Anode 5 adopts carbon felt to build, barrier film 3 between anode and negative electrode is nonwoven fabrics, in order to reduce resistance, adopt stainless (steel) wire as anode current collector net 4, when electrochemical appliance is during with biological fuel cell mode operation, adopt load (6), and during with the operation of biological electrolysis pool mode, adopt stabilized voltage power supply or potentiostat as additional power source (7).Selecting according to the water quality characteristic of discarded object and waste water and the oxidation-reduction potential of going back parent pollutant of power supply.(referring to Figure of description 1)
Embodiment 2: independent negative electrode synthesizes negative oxygen ion, hydrogen and methane bioelectrochemistry device and builds
Utilize independent negative electrode to build the electrochemical appliance of synthetic negative oxygen ion, hydrogen and methane, comprise the anode chamber 1 as reactor, conduction wall 2, barrier film 3, anode current collector net 4 and anode 5, additional power source 7 or load 6 and external circuit.Anode chamber 1 establishes the gas reservoir 8 that water inlet 9, delivery port 10 and gas outlet connect.(referring to Figure of description 2)
Embodiment 3: multiple devices of sharing cathode chamber are in series or in parallel to form integrating device
Device as described in Example 1, by the combination of multiple (at least two) serial or parallel connection, the reactor that stainless steel conduction wall builds can do assistant anode chamber, shares an open cathode chamber communicating with surrounding air.(referring to Figure of description 3)
Embodiment 4: multiple devices of sharing anode chamber are in series or in parallel to form integrating device
Device as described in Example 2, the independent cathode chamber that multiple (at least two) are communicated with surrounding air embeds anode chamber, shares an anode chamber.(referring to Figure of description 4)
Embodiment 5: the synthetic negative oxygen ion of operation under biological fuel cell pattern
(1) structure of device
The bioelectrochemistry device that the present embodiment builds is as shown in Figure of description 1, mainly comprise a wastewater anaerobic oxidation reactor (anode chamber) 1, this reactor is cylindrical reactor, high 100mm, external diameter 76mm, wall thickness 1mm, total measurement (volume) is 400mL, and anode is carbon felt (tubular, girth 19.5cm, high 7cm, surface area 136.5cm
2); Between anode and cathode, separated by nonwoven fabrics, adopt titanium silk to connect negative electrode and anode, external circuit contact resistance is 100 Ω.Reactor top is by rubber stopper seal, and water inlet, delivery port, gas outlet (band unidirectional valve), anaerobic oxidation reactor (anode chamber) dischargeable capacity 300mL are set.Adopt peristaltic pump to circulate to the solution in anaerobic oxidation reactor.
(2) electrode biomembrane domestication
Device Anodic carbon felt is put into the biological fuel cell anode chamber, two chamber of an independent operating, inoculation anaerobic sludge.In cathode chamber, use oxygen as final electron acceptor.Move after three days, the synthetic organic wastewater (containing in 1L waste water: ammonium chloride 0.25g, potassium chloride 0.1g, mineral element solution 10mL, vitamin solution 10mL, anhydrous sodium acetate 1g, two hypophosphite monohydrate sodium dihydrogen 3.04g, disodium hydrogen phosphate dodecahydrate 10.92g) of preparation, add operation continuously in anode chamber, until anode potential stable maintenance is at-450～-480mV(vs.Ag/AgCl), illustrate that electrogenesis microorganism species forms, the success of anode carbon felt biofilms domestication, then carbon felt is inserted in the bioelectrochemistry device of Fig. 1.
(3) startup and the operation of device
Above-mentioned 300mL preparation organic wastewater is filled with in the bioelectrochemistry device anaerobic oxidation reactor (anode chamber) 1 of Fig. 1, is then sealed into the mouth of a river, anode chamber controls between pH4-9.Timing acquiring water sample analysis waste water COD degraded situation, changes fresh wastewater depending on the timing of COD degraded situation, and anaerobic oxidation organic wastewater COD load reaches after 0.2-0.4g COD/L.d, and device has started.By peristaltic pump flow control reactor water inlet volumetric loading, between 0.4-0.6gCOD/L.d, timing detects water outlet COD content, and device stable operation 60 days during this period, detects effluent COD concentration between 30-60mg/L.
(4) detection of negative oxygen ion
The detection of negative oxygen ion is carried out under reactor batch running environment, and the bioelectrochemistry device that adds 300ml waste water is placed to a 29.8mm × 248mm × 428mm, in the polymethyl methacrylate case of total measurement (volume) 31L.Experiment starts front employing AIC-1000 air ion counter and detects the negative oxygen ion in polymethyl methacrylate cabinet, and the mode by aeration pump from air inlet ventilation, detects negative oxygen ion in gas outlet, be then sealed into venthole.After 24h, pass into fresh air from air inlet, detect the airborne negative oxygen ion of gas port, the negative oxygen ion data in using the initial examination and measurement data of gas outlet as polymethyl methacrylate cabinet.
Result shows, under laboratory relative air humidity 50% environment, room air negative oxygen ion is at 60-380/cm
3between, through the reactor operation of 24h, in polymethyl methacrylate cabinet, air negative oxgyen ion reaches 2300-4800/cm
3.
Embodiment 6: synthetic hydrogen, methane and negative oxygen ion of operation under biological electrolysis pool mode
Bioelectrochemistry device and method flow process, preparation organic wastewater that the present embodiment builds are substantially the same manner as Example 5, different is that the load (resistance) that external circuit is connected changes stabilized voltage power supply into, the wherein anode of positive pole of stabilized voltage supply access bioelectrochemistry device anaerobic reactor (anode chamber), negative pole is connected with the conduction stainless steel wall of reactor, and reactor gas outlet connects a gas reservoir.
Device Starting mode is identical with embodiment 5, and result shows, under the electromotive force of additional 400mv, and the significantly rising of bioelectrochemistry device COD degraded load.Adopt batch operation, its COD degraded load can reach 0.8-1.0g/L.d.Carry out the detection of negative oxygen ion according to the mode of embodiment 5, under laboratory relative air humidity 50% environment, room air negative oxygen ion is at 80-420/cm
3between, through the reactor operation of 24h, in polymethyl methacrylate cabinet, air negative oxgyen ion reaches 8000-20000/cm
3.
In gas reservoir, gather gaseous sample analysis, in operation in earlier stage, in gaseous sample, density of hydrogen significantly rises, and volume fraction accounts for 30% of cumulative volume.Along with the increase of running time, methane concentration significantly rises, and density of hydrogen is reduced to completely and disappears.During stable operation, collect the fermentation gas 80-100ml containing methane every day, and methane content reaches 60%.
Embodiment 7: move synthesizing methane under biological electrolysis pool mode
Bioelectrochemistry device and method flow process, preparation organic wastewater and Starting mode that the present embodiment builds are substantially the same manner as Example 6, and wrap insulate adhesive tape completely cuts off with air outside different is stainless steel cathode.Result shows, under additional 400mv electromotive force, COD degraded load reaches 0.8-1.2g/L.d.During stable operation, collect the about 100-120ml of fermentation gas containing methane every day, and methane content reaches 70%.
A kind of also bioelectrochemistry apparatus and method of proper energy of extracting from discarded object and waste water of the present invention, be described by concrete example, those skilled in the art can use for reference content of the present invention, the links such as appropriate change raw material, process conditions realize corresponding other object, its relevant change does not all depart from content of the present invention, within all similar replacements and change will become apparent to those skilled in the art that and be all deemed to be included in scope of the present invention.
Claims (14)
1. one kind is extracted the also bioelectrochemistry device of proper energy from discarded object and waste water, it is characterized in that, described device comprises the anode chamber (1) as reactor, conduction wall (2), barrier film (3), anode (5), external circuit, and load (6) or additional power source (7); Described conduction wall (2) is the negative electrode of reactor, and negative electrode is embedded in anode chamber as reactor body structure or as independent negative electrode.
2. device according to claim 1, is characterized in that, when negative electrode is during as reactor body structure, forms sealing anode chamber, and negative electrode outside contacts with external environment air, is close to inside negative electrode with barrier film and anode; In the time that negative electrode is embedded in anode chamber as absolute construction, negative electrode inner side communicates with the surrounding air of circulation, and negative electrode outside is close to barrier film and anode, and whole anode chamber is in sealing state.
3. device according to claim 1, is characterized in that, anode chamber (1) establishes water inlet (9), delivery port (10), gas outlet, and the gas reservoir (8) being connected with gas outlet.
4. according to the arbitrary described device of claims 1 to 3, it is characterized in that, negative electrode adopts stainless steel, iron, aluminium, copper, lead metal electric conducting material or the conductivity ceramics of conduction to make; Its anode (5) adopts carbon felt, carbon paper, carbon cloth, agraphitic carbon fiber or active carbon to make.
5. according to the arbitrary described device of claims 1 to 3, it is characterized in that, one or more fillers of filling the woven wires such as activated carbon granule, agraphitic carbon fiber, stainless steel, titanium in anode chamber (1) build three-dimensional anode.
6. according to the arbitrary described device of claims 1 to 3, it is characterized in that, barrier film (3) adopts nonwoven fabrics or asbestos fibre or amberplex or composite fibre materials making.
7. according to the arbitrary described device of claims 1 to 3, it is characterized in that, additional power source (7) adopts stabilized voltage power supply or potentiostat.
8. device according to claim 1, is characterized in that, forms while moving under biological electrolysis pool mode at additional power source (7), and negative electrode outside completely cuts off with insulating material and air.
9. from discarded object and waste water, extract an also bioelectrochemistry integrating device for proper energy, it is characterized in that the arbitrary described device of the claim 1 to 3 that comprises two or more, and between multiple device, be in parallel or be connected in series.
10. the integrating device of stating according to claim 9, is characterized in that, the reactor that described conduction wall builds, as assistant anode chamber, is shared an open cathode chamber communicating with surrounding air.
11. integrating devices of stating according to claim 9, is characterized in that, the embedded independent cathode chamber communicating with surrounding air is shared an anode chamber.
12. 1 kinds are extracted the also bio-electrochemical process of proper energy from discarded object and waste water, it is characterized in that, utilize claim 1,2,3,9,10,11 any devices, different according to the reducing substances composition of discarded object and waste water, first adhere to corresponding microorganism species at anode, then, device independent operating under biological fuel cell or biological electrolysis pool mode, or two kinds of mode alternate runs, it is gone back proper energy and derives from microbe participation discarded object and anaerobic waste water respiratory metabolism.
13. a kind of also bio-electrochemical process of proper energy that extract from discarded object and waste water according to claim 12, is characterized by pH value in whole anaerobic oxidation process and are controlled between 4 to 9.
14. a kind of also bio-electrochemical process of proper energy that extract from discarded object and waste water according to claim 12, is characterized by under biological electrolysis pool mode, and during with stabilized voltage power supply applying electrical potential, the electromotive force between anode and negative electrode is between 100mv-2000mv; While adopting potentiostat applying electrical potential, control anode potential at-400mv-+1200mv(VS.Ag/AgCl) between.
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| CN110482681A (en) * | 2019-08-23 | 2019-11-22 | 昆明理工大学 | A method of sour water containing heavy metal handles coproduction new energy |
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| CN108002517B (en) * | 2017-12-16 | 2023-10-24 | 傲自然成都生物科技有限公司 | Bioelectrochemical coupling system for purifying drinking water and purifying method thereof |
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| CN113880232A (en) * | 2021-10-09 | 2022-01-04 | 上海林海生态技术股份有限公司 | Double-electrode plate structure suitable for bioelectrochemical system |
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