CN102295968A - High value utilization method of carbon dioxide in biogas - Google Patents
High value utilization method of carbon dioxide in biogas Download PDFInfo
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- CN102295968A CN102295968A CN201110188625.1A CN201110188625A CN102295968A CN 102295968 A CN102295968 A CN 102295968A CN 201110188625 A CN201110188625 A CN 201110188625A CN 102295968 A CN102295968 A CN 102295968A
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- flue gas
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- 238000000034 method Methods 0.000 title claims abstract description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title abstract description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 title abstract description 7
- 239000001569 carbon dioxide Substances 0.000 title abstract description 4
- 241000195493 Cryptophyta Species 0.000 claims abstract description 24
- 239000000446 fuel Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000000813 microbial effect Effects 0.000 claims abstract description 10
- 230000001651 autotrophic effect Effects 0.000 claims abstract description 9
- 230000002906 microbiologic effect Effects 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 238000005286 illumination Methods 0.000 claims description 31
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 20
- 239000003546 flue gas Substances 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 9
- 244000005700 microbiome Species 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 241000195649 Chlorella <Chlorellales> Species 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 241000195628 Chlorophyta Species 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 3
- 239000002028 Biomass Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000004060 metabolic process Effects 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000000241 respiratory effect Effects 0.000 abstract description 5
- 238000000855 fermentation Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 8
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 244000025254 Cannabis sativa Species 0.000 description 4
- 235000011089 carbon dioxide Nutrition 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000002808 molecular sieve Substances 0.000 description 4
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000009395 breeding Methods 0.000 description 3
- 230000001488 breeding effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 229920004449 Halon® Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000010405 anode material Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002551 biofuel Substances 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000029553 photosynthesis Effects 0.000 description 2
- 238000010672 photosynthesis Methods 0.000 description 2
- -1 polyoxyethylene Polymers 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 206010003694 Atrophy Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 230000037444 atrophy Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000243 photosynthetic effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a high value utilization method of carbon dioxide in biogas. Pretreated raw materials are treated with an anaerobic fermentation to generate a mixed gas with CO2 and CH4 as main components; and the mixed gas is sent into an illuminating bioreactor. Algae in the illuminating bioreactor utilizes the CO2 in the mixed gas as carbon source and energy needed by growth; meanwhile, algae adhering on a biological anode of an autotrophic microbial fuel apparatus outputs electrons generated by respiratory metabolism to an air cathode through an external circuit; and the electrons generate current under catalyst effects. The generated current can be used as power source of an illuminating system of the illuminating bioreactor. While, the algae can be further used as a raw material for the anaerobic fermentation or used for extracting substances with high added value. A CO2 content in the biogas is reduced after being used by the bioreactor and a microbiological fuel cell, and a CH4 content is increased. According to the invention, energy conversion efficiency of the whole system is increased.
Description
Technical field
The present invention relates to the utilization of carbonic acid gas in the biological flue gas, especially the algae of carbonic acid gas absorbs and the resources circulation of autotrophic type biofuel cell electrogenesis and the energy transform the field.
Technical background
Methane content is 55%～70% in the biological flue gas composition, carbon dioxide content is 28%～44%.By removing CO
2Can improve the Energy value of unit volume gas, in addition, remove CO
2Also can improve the biogas quality, as methanol automobile fuel.Current, from biogas, remove CO
2So that biogas reaches the standard of automobile fuel or reaches the quality standard of importing natural gas grid, it is commonly used in industry to have 4 kinds of different technologies.
(1) washing process
Because CO
2And H
2The solubleness of S in water is bigger than methane, so washing not only can be removed CO
2Can also remove H
2S, this absorption process is pure physical reaction.Usually biogas enters from the absorption column bottom by compressing the back, and water advances the people and carries out the Flow Injection Chemiluminescence Method absorption from the top.Because H
2The solubleness of S in water compares CO
2Greatly, so washing also can be removed H
2S.Absorbed CO
2And H
2The water of S can reprocessing cycle use, and can regenerate the H in water by decompression or with air stripping in absorption column
2When the S concentration ratio is higher, generally do not recommend to use air stripping, again can be because water is very fast by sulphur pollution.If have waste water to utilize, do not recommend water is regenerated.
(2) polyoxyethylene glycol washing process
The polyoxyethylene glycol washing is the same with washing also to be a physical absorption process.Selexol is a kind of trade(brand)name of solvent, and major ingredient is Poly Dimethyl Diallyl Ammonium Chloride ethylene glycol (DMPEG).With the same in water, CO
2And H
2The solubleness of S in Selexol is bigger than methane, and difference is CO
2And H
2Solubleness is than big in the water in Selexol for S, and the amount of required like this Selexol also can reduce, more economically with energy-conservation.In addition, water and halon (composition in the category sludge gas) also can be removed with the Selexol washing.The Selexol repeated use of can regenerating can be used the elementary sulfur among water vapor or rare gas element (purified marsh gas and Sweet natural gas) the stripping Selexol, but does not recommend to use air.
(3) carbonaceous molecular sieve technology
Molecular sieve is a kind of extraordinary product on the specific gaseous fraction in separating biogas.Usually molecule is adsorbed in the charcoal hole by loosely, and can separate out.Can optionally absorb by different mesh sizes or pressure.When pressure reduced, the compound component that absorbs in the molecular sieve can discharge.So this process usually is known as " transformation absorption " (PSA).Can make the molecular sieve purification biogas that is rich in the micrometer grade hole gap structure with coke.
(4) membrane separation process
Membrane separating mainly contains two kinds of methods, and a kind of is that the both sides of film all are that the high pressure gas of gas phase separate; Another kind is the low-pressure vapor phase one liquid phase absorption extraction that diffuses through the molecule of film by liquid-absorbent.
High pressure vapor is separated: be compressed to 36 * 10
5The biogas of Pa at first passes through active-carbon bed to remove halon and H
2S, then just logical people's filter bed and well heater.Film is to be made by cellulose acetate, can be used for separating as CO
2, water vapor and residual H
2S isopolarity molecule, it has certain selectivity, promptly absorbs H in different zones
2S and CO
2, but the N in can not separation of methane
2Film can continue to use 3 years. and after using a year and a half, because the cause of atrophy, membrane permeability can reduce 30%.
Gas phase one liquid phase absorbing film separates: gas phase one liquid phase absorbing film technology just is used on the marsh gas purifying recently, its essence is the H in the biogas
2S and CO
2Molecule passes a porous hydrophobic membrane and be absorbed removal in liquid phase.CO
2Can make liquid phase by amine aqueous solution and remove, amine aqueous solution can pass through thermal regeneration, the purified CO of release place
2Can do industry uses.
As seen, CO in the biological flue gas in the above method
2Removal many being adsorbed as the master, and do not reach CO
2Recycle.
Utilize biological photosynthesis to absorb fixation of C O
2Technology is not owing to need to capture separation of C O
2, safe, technology is mature on the whole, but also can be at CO
2Utilizing the byproduct that obtains economically valuable in the process, is one of technology that has at present development prospect.Little algae absorbs CO
2The back can effectively change into carbohydrate (carbohydrate), hydrogen and oxygen by photosynthesis.Because little algae has the photosynthetic rate height, breeding is fast, environmental compatibility is strong, processing efficiency is high and easily and advantage such as other engineering is integrated, at algae CO in flue gas
2The performance that removes carried out a large amount of research, studied CO in the flue gas that little algae given off fossil oil thermal power plant as Zeiler etc. in nineteen ninety-five
2Absorption and utilization (Zeiler, 1995, The use of microalgae for assimilation and utilization of carbon dioxide from fossil fuel-fired power plant flue gas.).
Microbiological fuel cell (MFCs) is a kind of catalysis that utilizes microorganism, is converted to the device of electric energy with being stored in organic chemical energy.Because it can produce electric energy simultaneously when carrying out biological metabolism, caused researchers' extensive interest.It is feasible that confirmations such as the Feng Yali of University of Science ﹠ Technology, Beijing make up microbiological fuel cell with chlorella.
Summary of the invention
The purpose of this invention is to provide carbonic acid gas high-value-use method in a kind of biological flue gas, by to CO in the biological flue gas
2Absorption and utilization, form CO
2The many recycles and the energy transform, with biological flue gas purify, CO
2The method of absorption, algae culture and becoming one of biofuel cell electrogenesis, economy, society and the environmental benefit of raising system.
The present invention mainly is that the respiratory metabolism by algae absorbs the CO in the biological flue gas
2, and thereby the electronics that utilizes microbiological fuel cell to utilize to produce in the respiratory metabolism process produces electric current, realized CO with this by algae grows
2Absorption, decontamination of biological combustion gas, and improve the energy transformation efficiency of total system by microbiological fuel cell.
Concrete technical scheme of the present invention is as follows, as shown in Figure 1, comprises the steps:
(1) raw materials pretreatment:
Biomass material is carried out removal of impurities, break process, adopt the prior art pre-treatment.Described pretreated prior art refers in the prior art raw material is carried out pretreated technique means before the anaerobically fermenting.Regulate about the pH to 7.0 of stock liquid.
(2) anaerobically fermenting:
Adopt prior art to carry out anaerobically fermenting to the raw material after handling to obtain CO
2And CH
2Mixed gas.Described anaerobically fermenting, by hydrolysis, product acid and three main phase of product methane, making feedstock conversion is with CO
2And CH
4Mixed gas for main component.
(3) illumination biological respinse:
The mixed gas delivery that step (2) is obtained arrives in the illumination bio-reactor, and with CO in the mixed gas
2Be the algal grown in the illumination the bio-reactor required carbon source and the energy;
(4) autotrophic type microorganism fuel-device generating
Combining with the illumination bio-reactor is provided with autotrophic type microorganism fuel-device, and by constituting biological anode attached to the algae on the anode, biological anode, external circuit, air cathode are formed microbial fuel cells system and reclaimed electric energy.Biological anode wherein transmits the electronics that the algae respiratory metabolism produces, and arrive air cathode by external circuit output electronics, and reaction produces electric current under the Pt catalyst action.
(5) reduced CO wherein after the utilization of biological flue gas through illumination bio-reactor and microbiological fuel cell
2Content, and improved CH
4Content.Can discharge standby.
Above-mentioned steps can also have following replenishing:
Algae in the illumination bio-reactor can be selected the chlorella of Chlorophyta for use, can be used as the raw material of anaerobically fermenting or is used to extract the high added value material after its growth.
The electricity that autotrophic type microorganism fuel-device is produced can be used for the required illumination system power supply of illumination bio-reactor.Algae in the described illumination bio-reactor can utilize the microbial fuel cells system of being made up of algae bio anode, external circuit, air cathode to reclaim electric energy when carrying out self metabolism simultaneously.The required electric energy of the illumination system of described illumination bio-reactor can derive from electric energy that microbial fuel cells system reclaims, and realizes the self-sufficient of illumination system electric energy.
Among the present invention, the design of illumination bio-reactor and microbiological fuel cell all can be adopted prior art.Reduced CO wherein after the utilization of biological flue gas through illumination bio-reactor and microbiological fuel cell
2Content, and improved CH
4Content.
CO in the biological flue gas of the present invention and routine
2Absorb the technology difference, because the CO in the biological flue gas among the present invention
2Can be used for the algae grows breeding, the present invention is not influencing CH
2Improved CO in the time of content
2Utilising efficiency, and in this process, reclaim electric energy and be used for the required electric energy of system self, it has improved the substance flow of system and the transformation efficiency of energy stream.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention.
Embodiment:
Below in conjunction with embodiment content of the present invention is described further.
Embodiment 1: be the anaerobically fermenting and the CO of raw material with energy grass
2The high-value-use system
(1) pre-treatment of energy grass: the energy grass after will cradling with crusher with raw material pulverizing, the length that makes raw material is between 1-2cm, the raw material of pulverizing is handled 6h for 50 ℃ with 2% concentration alkali, alkaline process can neutralize and produce the acid that acid phase produces, regulate about the pH to 7.0 of stock liquid, can avoid acid excessively to accumulate the acid that is caused to a certain extent and suppress.
(2) anaerobically fermenting: pretreated raw material is entered in the reactor by the spiral feeding manner, the method of the continuous discharging of warm continuously feeding is carried out anaerobically fermenting in the employing, the temperature of anaerobically fermenting is 35-55 ℃, add the buffer reagent of bicarbonate of ammonia as pH, pH is controlled at 7.0-7.5, the fermented liquid concentration of raw material is controlled at 6-8%, and pH, temperature and gas production rate are monitored the anaerobically fermenting performance as index.Residence time of material is 20-30 days, obtains with CO after the fermentation
2And CH
2It is main mixed gas.Simultaneously with the liquid return of a part of discharging to fermentor tank inoculum as a supplement.By energy grass is in the mixed gas that produces of the anaerobically fermenting of raw material, CH
4Content is generally about 55%, and CO
2Concentration is generally between 35-45%.
(3) illumination biological respinse: in the illumination bio-reactor, algae is selected the chlorella of Chlorophyta for use to the mixed gas that anaerobically fermenting produced in the reactor through pipe-line transportation, with the CO in the mixed gas
2Be the required carbon source and the energy of growing, the temperature of controlling little algae cultivation is 20-40 ℃, and intensity of illumination is 1000-8000Lux, artificial light continuous illumination 12h.Reducing CO
2The time, realized growth and the breeding of algae self.
(4) microbial fuel cells system generates electricity: combining with the illumination bio-reactor is provided with autotrophic type microorganism fuel-device, by constituting biological anode attached to the algae on the anode, the microbial fuel cells system that biological anode, external circuit, air cathode are formed reclaims electric energy.Anode material and cathode material are that high graphite of conductivity or carbon material are formed, the anode material therefor can be graphite felt, graphite granule, the carbon felt, carbon cloth or their mixing material, negative electrode is mainly carbon cloth or graphite felt, membrane sepn is passed through in chamber, negative and positive the two poles of the earth, used film is proton exchange membrane or cationic exchange membrane, and circuit connects by lead, and lead is mainly the strong nickel of erosion resistance or alloy material is formed.Attached to the algae on the anode of microbial fuel cell, utilizing CO
2Can be to anode when carrying out respiratory metabolism with the electron transport that produces, and external circuit arrival negative electrode by being attached thereto, the proton that produces then transmits between liquid and reaches negative electrode, oxygen is by the effect reaction down of Pt catalyzer on the negative electrode in electronics, proton and the air, thereby formed the loop line, and produced electric current.Electric load on the external circuit of microbial fuel cells system is mainly the illumination system on the illumination bio-reactor, and microbial fuel cells system can realize that the power supply of illumination system is self-sufficient.
(5) CH
4Content improves: improves through the CH content in the gaseous constituent behind the illumination bio-reactor, and CO
2Concentration reduces.
Claims (4)
1. CO in the biological flue gas
2The high-value-use method is characterized in that comprising the steps:
(1) raw materials pretreatment: biomass material is carried out removal of impurities, break process, and carry out pre-treatment, regulate about the pH to 7.0 of stock liquid;
(2) anaerobically fermenting: the raw material after handling is carried out anaerobically fermenting to obtain CO
2And CH
2Mixed gas;
(3) illumination biological respinse: the mixed gas delivery that step (2) is obtained arrives in the illumination bio-reactor, and with CO in the mixed gas
2Be the algal grown in the illumination the bio-reactor required carbon source and the energy;
(4) autotrophic type microorganism fuel-device generates electricity: combining with the illumination bio-reactor is provided with autotrophic type microorganism fuel-device, by constituting biological anode attached to the algae on the anode, biological anode, external circuit, air cathode are formed microbial fuel cells system and are reclaimed electric energy;
(5) after illumination bio-reactor and microbiological fuel cell processing, reduced CO
2The biological flue gas of content is discharged standby.
2. CO in the biological flue gas as claimed in claim 1
2The high-value-use method is characterized in that also comprising the steps: behind the algal grown in the illumination bio-reactor raw material as anaerobically fermenting.
3. CO in the biological flue gas as claimed in claim 1 or 2
2The high-value-use method is characterized in that, described algae is selected from the chlorella of Chlorophyta.
4. CO in the biological flue gas as claimed in claim 1
2The high-value-use method is characterized in that also comprising the steps: that the electricity that autotrophic type microorganism fuel-device is produced is used for the required illumination system power supply of illumination bio-reactor.
Priority Applications (1)
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| CN201110188625.1A CN102295968A (en) | 2011-07-06 | 2011-07-06 | High value utilization method of carbon dioxide in biogas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110188625.1A CN102295968A (en) | 2011-07-06 | 2011-07-06 | High value utilization method of carbon dioxide in biogas |
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|---|---|
| CN102295968A true CN102295968A (en) | 2011-12-28 |
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|---|---|---|---|
| CN201110188625.1A Pending CN102295968A (en) | 2011-07-06 | 2011-07-06 | High value utilization method of carbon dioxide in biogas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084674A (en) * | 2015-09-08 | 2015-11-25 | 南京工业大学 | Environment-friendly waste water recycling and energy production device and production method |
| TWI555840B (en) * | 2012-03-07 | 2016-11-01 | 國立交通大學 | Biogas electric generator and electricity generation method using microalgae carbon capture |
| CN110921812A (en) * | 2019-12-19 | 2020-03-27 | 苏州首创嘉净环保科技股份有限公司 | Photoelectrocatalysis coupling autotrophic denitrification microorganism nitrogen and phosphorus removal process method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI555840B (en) * | 2012-03-07 | 2016-11-01 | 國立交通大學 | Biogas electric generator and electricity generation method using microalgae carbon capture |
| CN105084674A (en) * | 2015-09-08 | 2015-11-25 | 南京工业大学 | Environment-friendly waste water recycling and energy production device and production method |
| CN105084674B (en) * | 2015-09-08 | 2017-05-24 | 南京工业大学 | Environment-friendly waste water recycling and energy production device and production method |
| CN110921812A (en) * | 2019-12-19 | 2020-03-27 | 苏州首创嘉净环保科技股份有限公司 | Photoelectrocatalysis coupling autotrophic denitrification microorganism nitrogen and phosphorus removal process method |
| CN112374605A (en) * | 2020-11-12 | 2021-02-19 | 四川大学 | Microbial fuel cell and algae photosynthetic biological system series test device |
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