CN108977248A - A kind of biogas in-line purification device - Google Patents
A kind of biogas in-line purification device Download PDFInfo
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- CN108977248A CN108977248A CN201811090725.9A CN201811090725A CN108977248A CN 108977248 A CN108977248 A CN 108977248A CN 201811090725 A CN201811090725 A CN 201811090725A CN 108977248 A CN108977248 A CN 108977248A
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- Prior art keywords
- carbon dioxide
- biogas
- tower
- purification device
- line purification
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- 238000000746 purification Methods 0.000 title claims abstract description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 128
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 64
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 64
- 238000003795 desorption Methods 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 5
- 230000033116 oxidation-reduction process Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 23
- 239000000243 solution Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000005261 decarburization Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005262 decarbonization Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/104—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
-
- C—CHEMISTRY; METALLURGY
- 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
- C12M1/00—Apparatus for enzymology or microbiology
-
- C—CHEMISTRY; METALLURGY
- 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
- C12M1/00—Apparatus for enzymology or microbiology
- C12M1/107—Apparatus for enzymology or microbiology with means for collecting fermentation gases, e.g. methane
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Biotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Sustainable Development (AREA)
- Microbiology (AREA)
- Medicinal Chemistry (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of biogas in-line purification devices, it includes anaerobic reactor (1) and carbon dioxide tower (2), anaerobic reactor (1) lower part is connected to the top of the carbon dioxide tower (2) through inlet tube (3), the lower part of the carbon dioxide tower (2) is connected to the top of the anaerobic reactor (1) through outlet tube (4), the outlet tube (4) is equipped with circulating pump (5), the top of the carbon dioxide tower (2) is additionally provided with exhaust emission tube (8) so that the exhaust gas after desorbing carbon dioxide is discharged.Biogas in-line purification device provided by the invention can remove the carbon dioxide generated during anaerobic reaction, improve the purity of biogas, while improving anaerobic reaction effluent quality.
Description
Technical field
The present invention relates to technical field of waste water processing, in particular to a kind of biogas in-line purification device.
Background technique
Now, energy conservation and environmental protection theory becomes more and more popular, and biogas is increasingly subject to as a kind of renewable, green energy resource
Everybody attention.A kind of product of the biogas as anaerobic fermentation, main component be methane, carbon dioxide, hydrogen sulfide, nitrogen,
Moisture etc., wherein methane accounting 55%~65%, the presence of carbon dioxide 30~40%, carbon dioxide reduce the heat of biogas
Value, reduces its use value.In the higher occasion of requirement, such as: marsh gas power generation, as natural gas etc. requires pair
Biogas carries out decarburization, improves methane content of bilogas to 85% or more.
Decarburization (carbon dioxide) is carried out to biogas at present, usually after anaerobic fermentation generates biogas, biogas is delivered to
Another place specially carries out decarburization using decarbonization device.The method of decarburization mainly has physics and chemical method.
Physical method mainly has pressure-variable adsorption, pressurization to wash, amine liquid washs and measures, the chemical methodes such as UF membrane are mainly
Using absorbent by carbon dioxide absorption.
Decarburization is carried out to biogas using physics or chemical method, has energy consumption high, operational administrative is complicated, and operating cost is high
The disadvantages of, and dystopy Methane decarbonization is carried out, the construction of biogas conveyance conduit and operating cost can be increased.
Summary of the invention
It is an object of the present invention to provide a kind of biogas in-line purification devices, for removing the titanium dioxide generated in anaerobic reactor
Carbon improves biogas purity.
Based on the above issues, present invention provide the technical scheme that
A kind of biogas in-line purification device comprising anaerobic reactor and carbon dioxide tower, the anaerobic reactor
Lower part is connected to the top of the carbon dioxide tower through inlet tube, and the lower part of the carbon dioxide tower connects through outlet tube
It is connected to the top of the anaerobic reactor, the outlet tube is equipped with circulating pump, and the top of the carbon dioxide tower is also set
There is exhaust emission tube so that the exhaust gas after desorption carbon dioxide is discharged.
In some embodiments wherein, the inlet tube is from 15~20 meters at the top of the anaerobic reactor, mixed liquor
It is flow in the carbon dioxide tower certainly through the inlet tube.
In some embodiments wherein, the lower part of the carbon dioxide tower is connected with air intake duct, described
Air intake duct is equipped with blower, with being passed through air in the previous carbon dioxide tower.
In some embodiments wherein, the outlet tube be equipped with oxidation-reduction potential monitor, to control into
Enter the air capacity of the carbon dioxide tower.
In some embodiments wherein, the lower part of the carbon dioxide tower is equipped with heat source import, with previous institute
It states in carbon dioxide tower and is passed through heat source.
In some embodiments wherein, the outlet tube is equipped with temperature monitor, to control heat source temperature.
In some embodiments wherein, the exhaust emission tube is equipped with emission-control equipment.
Compared with prior art, the invention has the advantages that
1, using technical solution of the present invention, which can remove the carbon dioxide generated during anaerobic reaction, improve
Biogas purity reduces the construction of biogas conveyance conduit and operating cost, while after Methane decarbonization, reduction is dissolved in carbon dioxide in waste water
Amount, improve the pH of waste water, increase reactor to impact resistance sour in water inlet, improve the stabilization of anaerobic reactor operation
Property；
2, using technical solution of the present invention, at the same have air lift, heating and decompression desorption three kinds of effects, carbon dioxide with
Hydrogen sulfide stripping rate is high；
3, using technical solution of the present invention, anaerobic reactor is both biogas generator and carbon dioxide absorption tower, nothing
Additional mating absorption unit of dioxide carbon is needed, does not add carbon dioxide absorption medicament, operating cost is low；
4, using technical solution of the present invention, after carbon dioxide, the methane in sewage gas of anaerobic reactor discharge contains
Amount is 85% or more, and calorific value is high, and hydrogen sulfide content is low, and biogas quality is high, can be directly used for marsh gas power generation or as low-quality
Natural gas motorcar saves use cost；
5, using technical solution of the present invention, the carbon dioxide in biogas is removed online, biogas conveying can be saved
Pipe-line construction expense can also remove hydrogen sulfide while removing removing carbon dioxide, reduce anaerobic reactor and subsequent processing is set
Standby corrosion；
6, using technical solution of the present invention, sludge removes the gas of its carrying through desorber in mixed liquor, and density adds
Greatly, settling property improves, and anaerobic reactor water outlet carries sludge quantity and reduces, and effluent quality improves, and simultaneous reactions device is stable
Property improve.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, drawings in the following description are only some embodiments of the invention, skill common for this field
For art personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of biogas in-line purification Installation practice of the present invention；
Wherein:
1, anaerobic reactor；2, carbon dioxide tower；3, inlet tube；4, outlet tube；5, circulating pump；6, redox electricity
Position monitor；7, temperature monitor；8, exhaust emission tube；9, air intake duct；10, blower；11, heat source import；12, at exhaust gas
Manage device.
Specific embodiment
Above scheme is described further below in conjunction with specific embodiment.It should be understood that these embodiments are for illustrating
The present invention and be not limited to limit the scope of the invention.Implementation condition used in the examples can be done according to the condition of specific producer
Further adjustment, the implementation condition being not specified is usually the condition in routine experiment.
Referring to Fig. 1, it is the structural schematic diagram of the embodiment of the present invention, a kind of biogas in-line purification device, including anaerobism is provided
Reactor 1 and carbon dioxide tower 2,1 lower part of anaerobic reactor are connected to the top of carbon dioxide tower 2 through inlet tube 3,
The muddy water mixed solution of 1 lower part of anaerobic reactor is from flowing in carbon dioxide tower 2, and the lower part of carbon dioxide tower 2 is through going out
Liquid pipe 4 is connected to the top of anaerobic reactor 1, circulating pump 5 is equipped on outlet tube 4, by circulating pump 5 and outlet tube 4 through solving
Mixed liquor after inhaling carbon dioxide is back to anaerobic reactor 1, is equipped with exhaust emission tube 8 on the top of carbon dioxide tower 2
The exhaust gas after desorbing carbon dioxide is discharged.Mixed liquor is longer in 2 residence time of carbon dioxide tower, carbon dioxide eliminating effect
Fruit is better, by adjusting the flow of circulating pump 5, adjusts residence time of the mixed liquor in desorber.In this example, carbon dioxide solution
Suction tower 2 is the prior art, and the present invention repeats no more, and packed tower, bubble tower and sieve-plate tower etc. can be used.
In this example, inlet tube 3 apart from 15~20 meters of the top of anaerobic reactor 1, this height mixed liquor pressure bearing is 1.5~
2.0 kilograms of atmospheric pressure, at this pressure, the solubility of carbon dioxide in water are 1.5~2.0 times under normal pressure, from the height
It is back in normal pressure desorber, there is decompression desorption.
It is connected with air intake duct 9 in the lower part of carbon dioxide tower 2, air intake duct 9 is equipped with blower 10, to
It is passed through air in carbon dioxide tower 2, is passed through air in carbon dioxide tower 2, has the function of air lift desorption, gas
The air capacity of offer is bigger, and carbon dioxide eliminating effect is better.
For the ease of the oxygen content in control anaerobic reactor 1, oxidation-reduction potential monitor 6 is equipped on outlet tube 4,
When oxidation-reduction potential is more than certain value, 10 air quantity of blower is reduced.
In order to advanced optimize implementation result of the invention, it is equipped with heat source import 11 in the lower part of carbon dioxide tower 2,
With heat source, such as hot wind is passed through in previous carbon dioxide tower 2, it is passed through heat source in carbon dioxide tower 2, there is heating
Desorption, temperature is higher, and carbon dioxide effect is better, and heat source import supplements certain heat, improves carbon dioxide
Effect, while can guarantee that the mixeding liquid temperature for being back to anaerobic reactor 1 does not reduce.
In order to control the temperature for being back to mixed liquor in anaerobic reactor 1, it is equipped with temperature monitor 7 on outlet tube 4, uses
To control heat source temperature, backflow mixed liquor is controlled at 35~39 DEG C.
In order to remove the exhaust gas after carbon dioxide, exhaust emission tube 8 is equipped with emission-control equipment 12, mainly goes
Partial vulcanization hydrogen, ammonia, mercaptan for generating except desorption etc., can be used the devices such as absorption tower, adsorption tower.Hydrogen sulfide is molten in waste water
Therefore Xie Du while carbon dioxide removal, can also remove partial vulcanization hydrogen also above the solubility of methane.
After purification device processing, fire damp content is discharged 85% or more in anaerobic reactor 1.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Member cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
The equivalent transformation or modification that Spirit Essence is done, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of biogas in-line purification device, it is characterised in that: including anaerobic reactor (1) and carbon dioxide tower (2), institute
State the top that anaerobic reactor (1) lower part is connected to the carbon dioxide tower (2) through inlet tube (3), the carbon dioxide
The lower part of desorber (2) is connected to the top of the anaerobic reactor (1) through outlet tube (4), and the outlet tube (4) is equipped with and follows
Ring pumps (5), after the top of the carbon dioxide tower (2) is additionally provided with exhaust emission tube (8) so that desorption carbon dioxide is discharged
Exhaust gas.
2. biogas in-line purification device according to claim 1, it is characterised in that: the inlet tube (3) is from the anaerobism
15~20 meters at the top of reactor (1), mixed liquor is flow in the carbon dioxide tower (2) certainly through the inlet tube (3).
3. biogas in-line purification device according to claim 1, it is characterised in that: the carbon dioxide tower (2)
Lower part is connected with air intake duct (9), and the air intake duct (9) is equipped with blower (10), with the previous carbon dioxide solution
It inhales in tower (2) and is passed through air.
4. biogas in-line purification device according to claim 3, it is characterised in that: the outlet tube (4) is equipped with oxidation
Reduction potential monitor (6), to control the air capacity into the carbon dioxide tower (2).
5. biogas in-line purification device according to claim 1, it is characterised in that: the carbon dioxide tower (2)
Lower part is equipped with heat source import (11), is passed through heat source with the previous carbon dioxide tower (2) is interior.
6. biogas in-line purification device according to claim 5, it is characterised in that: the outlet tube (4) is equipped with temperature
Monitor (7), to control heat source temperature.
7. biogas in-line purification device according to claim 1, it is characterised in that: the exhaust emission tube (8) is equipped with
Emission-control equipment (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811090725.9A CN108977248A (en) | 2018-09-18 | 2018-09-18 | A kind of biogas in-line purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811090725.9A CN108977248A (en) | 2018-09-18 | 2018-09-18 | A kind of biogas in-line purification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108977248A true CN108977248A (en) | 2018-12-11 |
Family
ID=64545617
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811090725.9A Pending CN108977248A (en) | 2018-09-18 | 2018-09-18 | A kind of biogas in-line purification device |
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| Country | Link |
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| CN (1) | CN108977248A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892267A (en) * | 2010-06-22 | 2010-11-24 | 华北电力大学 | Marsh gas fermentation process having methane in-situ enrichment function |
-
2018
- 2018-09-18 CN CN201811090725.9A patent/CN108977248A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892267A (en) * | 2010-06-22 | 2010-11-24 | 华北电力大学 | Marsh gas fermentation process having methane in-situ enrichment function |
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Application publication date: 20181211 |