CN109161476A - A kind of apparatus and method of electricity fermentation methane phase - Google Patents
A kind of apparatus and method of electricity fermentation methane phase Download PDFInfo
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 238000000034 method Methods 0.000 title claims abstract description 70
- 238000000855 fermentation Methods 0.000 title claims abstract description 51
- 230000004151 fermentation Effects 0.000 title claims abstract description 51
- 230000005611 electricity Effects 0.000 title claims description 38
- 230000029087 digestion Effects 0.000 claims abstract description 26
- 239000010802 sludge Substances 0.000 claims abstract description 16
- 239000002910 solid waste Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 210000003608 fece Anatomy 0.000 claims abstract description 8
- 244000144972 livestock Species 0.000 claims abstract description 7
- 244000144977 poultry Species 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 29
- 239000002994 raw material Substances 0.000 claims description 22
- 239000004020 conductor Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 17
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- 239000004744 fabric Substances 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 claims description 6
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
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- 229940075397 calomel Drugs 0.000 description 2
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- 239000002028 Biomass Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
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- 239000010813 municipal solid waste Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- BOPGDPNILDQYTO-NNYOXOHSSA-N nicotinamide-adenine dinucleotide Chemical compound C1=CCC(C(=O)N)=CN1[C@H]1[C@H](O)[C@H](O)[C@@H](COP(O)(=O)OP(O)(=O)OC[C@@H]2[C@H]([C@@H](O)[C@@H](O2)N2C3=NC=NC(N)=C3N=C2)O)O1 BOPGDPNILDQYTO-NNYOXOHSSA-N 0.000 description 1
- 229930027945 nicotinamide-adenine dinucleotide Natural products 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/02—Stirrer or mobile mixing elements
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- C12M35/00—Means for application of stress for stimulating the growth of microorganisms or the generation of fermentation or metabolic products; Means for electroporation or cell fusion
- C12M35/02—Electrical or electromagnetic means, e.g. for electroporation or for cell fusion
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- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
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- 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
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Abstract
本发明公开了一种电发酵产甲烷的装置及方法，所述装置包括罐体、恒电位仪、工作电极、辅助电极和参比电极；工作电极、辅助电极和参比电极分别与恒电位仪连接；工作电极和辅助电极设置于罐体内部，参比电极设置于工作电极和辅助电极之间；罐体顶部设置有甲烷收集口；罐体底部设置有搅拌装置。本发明中通过电发酵产甲烷的方法具有工艺简单、启动速度快、厌氧消化产甲烷性能稳定的优点，与传统厌氧消化反应品相比，本发明中的方法产甲烷速率提高20‑30％、甲烷产生量可提高10‑15％，并且运行稳定，维护成本低，可广泛用于畜禽粪污、厨余垃圾、市政污泥、农林废物等有机固体废物的资源化循环利用与安全处置。The invention discloses a device and method for producing methane by electric fermentation. The device comprises a tank body, a potentiostat, a working electrode, an auxiliary electrode and a reference electrode; the working electrode, the auxiliary electrode and the reference electrode are respectively connected with the potentiostat. The working electrode and the auxiliary electrode are arranged inside the tank body, and the reference electrode is arranged between the working electrode and the auxiliary electrode; a methane collection port is arranged on the top of the tank body; and a stirring device is arranged at the bottom of the tank body. The method for producing methane by electric fermentation in the present invention has the advantages of simple process, fast start-up speed, and stable methane production by anaerobic digestion. Compared with the traditional anaerobic digestion reaction product, the method of the present invention increases the methane production rate by 20-30%. %, the methane production can be increased by 10-15%, and the operation is stable and the maintenance cost is low. It can be widely used in the recycling and safety of organic solid wastes such as livestock and poultry manure, kitchen waste, municipal sludge, agricultural and forestry wastes, etc. dispose of.
Description
Technical field
The present invention relates to a kind of apparatus and method of electricity fermentation methane phase.
Background technique
Currently, the organic solid wastes such as feces of livestock and poultry, house refuse, municipal sludge, agricultural waste that China generates every year
More than 5,000,000,000 tons, wherein about 3,800,000,000 tons of livestock and poultry feces, about 400,000,000 tons of house refuse, about 1,200,000,000 tons of agricultural waste.They are both one
Great environomental pollution source, while being also huge biomass resource and energy depot, energy value is roughly equal to 1,000,000,000 tons of standard coals,
Manurial value (N, P, K and organic matter) is more than the year output of China's chemical fertilizer.Recycling organic waste is neutralizing " environmental pollution "
" scarcity of resources " two big contradictory key, is great livelihood issues and strategic issue.
Common organic solid waste processing disposal options specifically include that landfill method, incineration method and biologic treating technique at present
(aerobic compost, anaerobic digestion) etc..Wherein, landfill method takes up a large area, and a large amount of percolates generated after landfill be easy to cause ground
Lower water pollution；Rule is burned because investment operating cost is huge, the waste gas from incinerator and burning ash of generation are disposed difficult.Based on disposition
Expense and waste resource recovery angle consider, biologic treating technique be considered as most attraction, sustainable organic solid it is useless
Object method of disposal.Biologic treating technique mainly includes aerobic compost and anaerobic digestion, wherein anaerobic digestion methane production technology, can
Effectively recycling methane as clean energy source, have it is simple and easy to do, low energy consumption, the advantages of having a wide range of application.
However, since anaerobic digestion methane phase is the multistage Biochemical processes under multiple-microorganism synergistic effect,
Methane phase rate is limited vulnerable to many factors, therefore the problem that generally existing methane phase is inefficient.For conventional anaerobic digestion
Problem existing for methane phase technology, many scholars at home and abroad carried out reactor transformation and operation optimization (CN104593432A,
CN108101333A, CN103555566A, CN104478178A, CN103555566A), but the generally existing technique of these patents
Complexity, produces the disadvantages of gas is unstable at methane phase low efficiency, is unfavorable for promoting and applying on a large scale, thus cannot fundamentally solve
Certainly defect existing for anaerobic digestion methane phase.
There is unique advantage using electrochemical method regulation debirs anaerobic digestion methane phase process.This is because should
Method effectively increases extracellular electronics using electric field driven power and supplies, and ATP in extracellular microbial is promoted to synthesize, the micro- life of directed change
Object metabolic pathway, to improve anaerobic digestion methane phase performance.Chinese invention patent CN101875962B discloses a kind of " biology
The method of electrochemical techniques screening high-efficiency methanogen floras ", screens to obtain with thermophilic by applying electrode in anaerobic digester system
Mixed bacterial based on producing hydrogen and methane bacterium.But this method is easy to cause the aggregation of dead organisms film on working electrode, reduces electricity
Sub- transmission efficiency, to affect anaerobic digestion methane phase performance.CN105621826A discloses a kind of " pretreatment joint electrification
The method of technology promotion residual active sludge anaerobic digestion methane phase ", mainly improves sludge using a variety of preprocess methods
Biodegradability.But the device is complicated because of needed for and additional substance is more, leads to complex process, higher cost, is unfavorable for advising greatly
The popularization and application of mould.Chinese patent CN104743663B, which is disclosed, " strengthens the life of methane phase using high organic matter high ammonia-nitrogen wastewater
Object electrochemical reaction appts and method ", the multistage electrochemical reaction slot by being equipped with cation-exchange membrane reduce ammonia nitrogen to anaerobism
The toxic action of microorganism.But the device is not suitable for organic solid waste processing mainly in high-concentration ammonia nitrogenous wastewater.
Through document and patent retrieval, the electricity fermentation methane phase method of machine waste is found no, it is organic also to have no that it is applied to
The precedent of waste processing disposition.
Summary of the invention
Existing complex process, methane phase efficiency when the purpose of the present invention is for conventional anaerobic digestion processing debirs
It is low, produce gas it is unstable the disadvantages of, provide it is a kind of electricity fermentation methane phase device and method.This method has simple process, starting
The advantage that speed is fast, gas producing efficiency is high.This has important application potentiality for the popularization and application of anaerobic digestion techniques.
Working electrode, auxiliary electrode and reference electricity are set in organic solid waste anaerobic digestion reaction vessel in the present invention
Pole, while certain polarization potential being provided to working electrode.Electrode effectively facilitates CO directly as electron donor2Micro-reduction
Methanogenesis (HCO3 -+9H++8e-→CH4+3H2O)；The potential difference of generation can also adjust NADH/NAD in microbial body+It is flat
Weighing apparatus improves methanogen activity to orient regulating and controlling microbial gene expression in vivo, enzymatic synthesis and metabolic pathway；In addition, addition
Conductive materials can speed up the direct electron transfer between syntrophism zymogenous bacteria and methanogen, promote syntrophism methane phase mistake
Journey.By the above different approaches, accelerates anaerobic digestion starting, significantly improve anaerobic digestion methane phase performance.
The technical solution used in the present invention is:
A kind of device of electricity fermentation methane phase, including tank body, potentiostat, working electrode, auxiliary electrode and reference electrode；
Working electrode, auxiliary electrode and reference electrode are connect with potentiostat respectively；Working electrode and auxiliary electrode are set in tank body
Portion, reference electrode are set between working electrode and auxiliary electrode；Top of the tank is provided with methane collection mouth；Tank base setting
There is agitating device.
Further, working electrode is at least one of stainless steel plate, graphite plate, carbon felt, carbon cloth electrode；Auxiliary electrode
For at least one of carbon felt, carbon cloth, graphite electrode；Reference electrode is Hg/HgO electrode, Ag/AgCl electrode, saturation calomel electricity
One of which in extremely.
Further, the current potential of working electrode setting is -0.1V to -1.0V vs.SCE.
Further, the current potential of working electrode setting is -0.6V to -0.8V vs.SCE.
A kind of method of electricity fermentation methane phase, comprising the following steps:
1) it is mixed in a certain ratio anaerobe and fermentation raw material to obtain fermenting mixture；
2) conductive materials are added in fermenting mixture, are stirred evenly；
3) fermenting mixture containing conductive materials is placed in device described in claims 1 to 3 and is fermented.
Further, fermentation raw material is organic solid waste, including sewage treatment plant excess sludge, feces of livestock and poultry, farming
One of organic solid wastes such as object stalk, house refuse, gardens dry branches and fallen leaves are a variety of.
Further, the moisture content of fermentation raw material is 70wt%-90wt%.
Further, the moisture content of fermentation raw material is 75%-90%.
Further, anaerobe from through taming activated sludge or electro-chemical activity bacterium.
Further, the inoculum concentration of anaerobe is the 1%-10% of fermentation raw material.
Further, the inoculum concentration of anaerobe is the 2.5%-5% of fermentation raw material.
Further, conductive materials are selected from graphite particle, charcoal, active carbon, tourmaline powder, magnetic iron oxide powder
One of or it is a variety of.
Further, the addition concentration of conductive materials is 0.1-5.0g/L.
Further, the addition concentration of conductive materials is 1.25-5g/L.
The beneficial effects of the present invention are:
(1) device of electricity fermentation methane phase provided by the invention need to be only arranged on the basis of conventional anaerobic digestion reactor
Three-electrode system (i.e. working electrode, auxiliary electrode and reference electrode), and a small amount of conductive materials, nothing are added during the fermentation
It needs to carry out original reactor any other transformation, therefore promotes convenient, great application prospect.
(2) the present invention provides a kind of method of electricity fermentation methane phase, have that simple process, starting speed be fast, anaerobism disappears
Change the stable advantage of methane phase performance.
(3) condition ratio is reacted with conventional anaerobic digestion, the method methane phase rate in the present invention improves 20-30%, methane
10-15% can be improved in yield, and stable, and maintenance cost is low.It can be widely used for livestock and poultry feces, rubbish from cooking, municipal administration
The resource recycling of the organic solid wastes such as sludge, agricultural waste utilizes and safe disposal.
Detailed description of the invention
Fig. 1 is electricity fermentation methane phase schematic device, 1- potentiostat, 2- working electrode, 3- reference electrode, 4- auxiliary electricity
Pole, 5- agitating device, 6- conductive materials, 7- methane collection mouth, 8- tank body.
Specific embodiment
A kind of device of electricity fermentation methane phase, including tank body 8, potentiostat 1, working electrode 2, auxiliary electrode 4 and reference
Electrode 3；Working electrode 2, auxiliary electrode 4 and reference electrode 3 are connect with potentiostat 1 respectively；Working electrode 2 and auxiliary electrode 4
It is set to inside tank body 8, reference electrode 3 is set between working electrode 2 and auxiliary electrode 4；Methane receipts are provided at the top of tank body 8
Collect mouth 7；8 bottom of tank body is provided with agitating device 5.
Further, working electrode is at least one of stainless steel plate, graphite plate, carbon felt, carbon cloth electrode；Auxiliary electrode
For at least one of carbon felt, carbon cloth, graphite electrode；Reference electrode is Hg/HgO electrode, Ag/AgCl electrode, saturation calomel electricity
One of which in extremely.
Further, the current potential of working electrode setting is -0.1V to -1.0V vs.SCE.
Further, the current potential of working electrode setting is -0.6V to -0.8V vs.SCE.
A kind of method of electricity fermentation methane phase, comprising the following steps:
4) it is mixed in a certain ratio anaerobe and fermentation raw material to obtain fermenting mixture；
5) conductive materials are added in fermenting mixture, are stirred evenly；
6) fermenting mixture containing conductive materials is placed in device described in claims 1 to 3 and is fermented.
Further, fermentation raw material is organic solid waste, including sewage treatment plant excess sludge, feces of livestock and poultry, farming
One of organic solid wastes such as object stalk, house refuse, gardens dry branches and fallen leaves are a variety of.
Further, the moisture content of fermentation raw material is 70wt%-90wt%.
Further, the moisture content of fermentation raw material is 75%-90%.
Further, anaerobe from through taming activated sludge or electro-chemical activity bacterium.
Further, the inoculum concentration of anaerobe is the 1%-10% of fermentation raw material.
Further, the inoculum concentration of anaerobe is the 2.5%-5% of fermentation raw material.
Further, conductive materials are selected from graphite particle, charcoal, active carbon, tourmaline powder, magnetic iron oxide powder
One of or it is a variety of.
Further, the addition concentration of conductive materials is 0.1-5.0g/L.
Further, the addition concentration of conductive materials is 1.25-5g/L.
Below in conjunction with Fig. 1 and embodiment, the present invention is further explained, it should be appreciated that following embodiment is merely to illustrate this hair
It is bright rather than limit the scope of the invention.Without departing from the spirit and substance of the case in the present invention, to the method for the present invention,
Modifications or substitutions made by step or condition, all belong to the scope of the present invention.
Unless otherwise specified, the conventional means that technological means used in embodiment is well known to those skilled in the art.
Embodiment 1
A kind of electricity fermentation methane phase method, using cylindrical reactor, diameter 30cm is highly 60cm, working electrode
And auxiliary electrode is graphite electrode, area 8cm2；Reference electrode is saturated calomel electrode.
A kind of electricity fermentation methane phase method, the specific steps are as follows:
(1) using sewage treatment plant excess sludge as raw material, 24 hours are stood, adjusting moisture content is 87.3%；
(2) by after domestication anaerobic sludge and the resulting raw material to be processed of step (1) in 2.5% ratio mix；
(3) conductive materials graphite particle is added in the fermenting mixture of step (2) by the dosage of 1.25g/L, is stirred
It mixes uniformly；
(4) fermenting mixture of step (3) is placed in electric installation for fermenting, connects potentiostat, setting potential is -0.6V
Vs.SCE carries out anaerobic digestion methane phase.
The results show that reacting by 18 days, the methane production of electricity fermentation methane phase technique is improved than traditional zymotic technique
98.1%, the anaerobic digestion lag phase time foreshortened to 3.0 days from 4.4 days；Volatile organic matter in electricity fermentation methane phase technique
(VS) total removal rate reaches 43.9%, improves 12.6% than traditional zymotic technique, effectively facilitates sludge reduction；Electrochemical credit
Analysis is the results show that the capacitance of electricity fermentation methane phase technique is 3.26mFcm-2, 58.3% is increased than traditional zymotic technique,
Prove that electric zymotechnique can promote the generation of redox mediators, to accelerate extracellular electron transmission；Electricity fermentation methane phase work
The economic benefit of skill is 3.1 times of traditional zymotic technique.
Embodiment 2
A kind of electricity fermentation methane phase method, using rectangular reactor according, having a size of 60 × 40 × 30cm, working electrode and auxiliary
Helping electrode is carbon cloth electrode, area 12cm2；Reference electrode is saturated calomel electrode.
A kind of electricity fermentation methane phase method, its step are as follows:
(1) using pig farm excreta as raw material, 18 hours are stood, adjusting moisture content is 80.6%；
(2) by after domestication anaerobic sludge and the resulting raw material to be processed of step (1) in 3% ratio mix；
(3) conductive materials graphite particle is added in the fermenting mixture of step (2) by the dosage of 3g/L, stirring is equal
It is even；
(4) fermenting mixture of step (3) is placed in electric installation for fermenting, connects potentiostat, setting potential is -0.8V
Vs.SCE carries out anaerobic digestion methane phase.
The results show that reacting by 24 days, the methane production of electricity fermentation methane phase technique is improved than traditional zymotic technique
46.5%, the anaerobic digestion lag phase time foreshortened to 3.9 days from 5.2 days；Volatile organic matter in electricity fermentation methane phase technique
(VS) total removal rate has reached 35.2%, improves 8.4% than traditional zymotic technique；The capacitance ratio of electricity fermentation methane phase technique
Traditional zymotic technique increases 26.7%；The economic benefit of electricity fermentation methane phase technique is 2.2 times of traditional zymotic technique.
Embodiment 3
A kind of electricity fermentation methane phase method, using cylindrical reactor, diameter 30cm is highly 60cm, working electrode
And auxiliary electrode is graphite electrode, area 9cm2；Reference electrode is saturated calomel electrode.
A kind of electricity fermentation methane phase method, its step are as follows:
(1) it using agricultural crop straw as raw material, crushes and mixes, adding water to adjust moisture content is 75%；
(2) anaerobic sludge after taming and the resulting raw material to be processed of step (1) are mixed in 5% ratio；
(3) conductive materials charcoal is added in the fermenting mixture of step (2) by the dosage of 5g/L, stirring is equal
It is even；
(4) fermenting mixture of step (3) is placed in electric installation for fermenting, connects potentiostat, setting potential is -0.8V
Vs.SCE carries out anaerobic digestion methane phase.
The results show that reacting by 28 days, the methane production of electricity fermentation methane phase technique is improved than traditional zymotic technique
68.3%, the anaerobic digestion lag phase time foreshortened to 5.5 days from 6.3 days；Volatile organic matter in electricity fermentation methane phase technique
(VS) total removal rate reaches 30.9%, improves 7.6% than traditional zymotic technique；The capacitance of electricity fermentation methane phase technique is than passing
System zymotechnique increases 22.4%；The economic benefit of electricity fermentation methane phase technique is 1.9 times of traditional zymotic technique.
Claims (10)
1. it is a kind of electricity fermentation methane phase device, it is characterised in that: including tank body, potentiostat, working electrode, auxiliary electrode and
Reference electrode；Working electrode, auxiliary electrode and reference electrode are connect with potentiostat respectively；Working electrode and auxiliary electrode setting
In tank interior, reference electrode is set between working electrode and auxiliary electrode；Top of the tank is provided with methane collection mouth；Tank body
Bottom is provided with agitating device.
2. the apparatus according to claim 1, it is characterised in that: working electrode is stainless steel plate, graphite plate, carbon felt, carbon cloth
At least one of electrode；Auxiliary electrode is at least one of carbon felt, carbon cloth, graphite electrode；Reference electrode is Hg/HgO electricity
Pole, Ag/AgCl electrode, the one of which in saturated calomel electrode.
3. the apparatus of claim 2, it is characterised in that: the current potential of working electrode setting is -0.1V to -1.0V
vs.SCE。
4. a kind of method of electricity fermentation methane phase, it is characterised in that: the following steps are included:
1) it is mixed in a certain ratio anaerobe and fermentation raw material to obtain fermenting mixture；
2) conductive materials are added in fermenting mixture, are stirred evenly；
3) fermenting mixture containing conductive materials is placed in progress anaerobic digestion production in device described in claims 1 to 3
Methane.
5. according to the method described in claim 4, it is characterized by: fermentation raw material is organic solid waste, including sewage treatment
One of organic solid wastes such as plant excess sludge, feces of livestock and poultry, agricultural crop straw, house refuse, gardens dry branches and fallen leaves or
It is a variety of.
6. method according to claim 4 or 5, it is characterised in that: the moisture content of fermentation raw material is 70wt%-90wt%.
7. according to the method described in claim 4, it is characterized by: anaerobe is from activated sludge or electrification through taming
Learn active bacteria.
8. the method according to claim 4 or 7, it is characterised in that: the inoculum concentration of anaerobe is fermentation raw material
1%-10%.
9. according to the method described in claim 4, it is characterized by: conductive materials be selected from graphite particle, charcoal, active carbon,
One of tourmaline powder, magnetic iron oxide powder are a variety of.
10. the method according to claim 4 or 9, it is characterised in that: the addition concentration of conductive materials is 0.1-5.0g/L.
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