CN105803004A - Method for low-temperature fermentation of biogas from agricultural waste - Google Patents
Method for low-temperature fermentation of biogas from agricultural waste Download PDFInfo
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- CN105803004A CN105803004A CN201410842173.8A CN201410842173A CN105803004A CN 105803004 A CN105803004 A CN 105803004A CN 201410842173 A CN201410842173 A CN 201410842173A CN 105803004 A CN105803004 A CN 105803004A
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- 238000000855 fermentation Methods 0.000 title claims abstract description 55
- 230000004151 fermentation Effects 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002154 agricultural waste Substances 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 14
- 241000196324 Embryophyta Species 0.000 claims abstract description 5
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 5
- 239000010903 husk Substances 0.000 claims abstract description 5
- 235000009566 rice Nutrition 0.000 claims abstract description 5
- 239000002023 wood Substances 0.000 claims abstract description 5
- 240000007594 Oryza sativa Species 0.000 claims abstract 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 88
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000000758 substrate Substances 0.000 claims description 18
- 241000220324 Pyrus Species 0.000 claims description 14
- 235000021017 pears Nutrition 0.000 claims description 14
- 238000010411 cooking Methods 0.000 claims description 12
- 235000011389 fruit/vegetable juice Nutrition 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 239000010802 sludge Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 206010059410 Faecaluria Diseases 0.000 claims description 7
- 238000011081 inoculation Methods 0.000 claims description 5
- 235000013312 flour Nutrition 0.000 claims description 4
- 244000144977 poultry Species 0.000 abstract description 8
- 244000144972 livestock Species 0.000 abstract description 6
- 239000010902 straw Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 210000003608 fece Anatomy 0.000 abstract description 4
- 239000000446 fuel Substances 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 210000002700 urine Anatomy 0.000 abstract description 2
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 235000012055 fruits and vegetables Nutrition 0.000 abstract 1
- 239000010871 livestock manure Substances 0.000 abstract 1
- 239000001963 growth medium Substances 0.000 description 14
- 241000894006 Bacteria Species 0.000 description 11
- 239000010815 organic waste Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 8
- 239000002609 medium Substances 0.000 description 8
- 239000000725 suspension Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 230000001954 sterilising effect Effects 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- 239000002054 inoculum Substances 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- 241000192023 Sarcina Species 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 235000012501 ammonium carbonate Nutrition 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000007640 basal medium Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000012136 culture method Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 2
- 235000019796 monopotassium phosphate Nutrition 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 241000193830 Bacillus <bacterium> Species 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 101100186820 Drosophila melanogaster sicily gene Proteins 0.000 description 1
- 241000205274 Methanosarcina mazei Species 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000010828 animal waste Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000009374 poultry farming Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- -1 therefore Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 239000000052 vinegar 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
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention specifically relates to a method for low-temperature fermentation of biogas from agricultural waste, which belongs to the technical field of biogas fermentation. The method provided by the invention employs straw materials, weeds, dry branches, fallen leaves, rice husk, wood chip, fruit and vegetable waste and excrement and urine waste for mixed fermentation of biogas, so cyclic utilization of energy and materials is realized. The objective of the invention is to overcome the problems that large-scale livestock and poultry culture and crop straw which is no longer used as major household fuel become main sources of rural environmental pollution, that production of biogas through anaerobic fermentation of manure of livestock and poultry in the prior art is greatly influenced by seasons and that traditional biogas slurry utilization technology is not mature enough.
Description
Technical field
The present invention relates to technical field of methane fermentation, specifically a kind of method utilizing agricultural wastes low temperature fermentation biogas.
Background technology
There is the application of decades as the biomass marsh gas fermentation technique that can replace the energy, along with the development of industrial or agricultural, the process to various organic wastes, had become as a social problem.Process bad meeting and cause environmental pollution, the wasting of resources；Handle well and will have significant social benefit, also by saving cost to the enterprise of output organic waste, brought considerable economic benefit.
China produces the various biodegradable organic waste of billions of tons every year, mainly includes straw-like materials, centralization-breeding factory fecaluria refuse, agriculture and forestry product processing waste, fruit/vegetable waste.These organic wastes produce biogas under anaerobic environment and are partially converted into regenerative resource.Along with whole world change aggravates, regenerative resource becomes the focus of global concern.Biodegradable organic waste anaerobic digestion produces methane, it is possible not only to deal carefully with disposal organic waste, and is obtained in that regenerative resource, it is achieved the resource of organic waste, therefore, organic waste anaerobic digestion methane phase tool has great prospects for development.Organic waste anaerobic digestion methane phase is a kind of traditional technique.China widelys popularize biogas technology in rural area always in decades；Along with China's livestock and poultry cultivation moves towards intensive, poultry excrement and urine disposal also develops to large methane tank direction, changes rural area to burn timber and the agricultural crop straw situation as fuel.Its basic method is to put in methane-generating pit after agricultural waste material and poultry farming garbage, sanitary sewage being mixed to ferment, produce biogas and be used as fuel, in use there are some problems in this method, the big content of starting materials agricultural waste material being mainly manifested in production and use of marsh gas fermentation is mainly existence after crop in autumn is received, but climate cooling after in autumn, temperature reduces, directly affects the fermentation of biogas, cause raw material sufficient, the aerogenesis that temperature is too low and causes is not enough, affects the life of people.
For solving above-mentioned situation, because improving methane backeria at the factor of created gase of cryogenic conditions, the method for China Patent No. CN101016558 is public a kind of accelerating methane fermentation by low-temperature, mainly add bamboo vinegar and carry out mixed fermentation to improve factor of created gase；Patent No. CN103266061A discloses a kind of low-temperature methane fermentation agent and preparation method thereof, it is prepared by parts by weight microorganism composition: methanococcus mazei DSM101325-10 part, underground methane bacillus DSM110746-8 part, cold methanogen DSM1645810-20 part, addicted to acid sarcina methanica DSM28345-9 part, Sicily sarcina methanica DSM119166-10 part, Bamboo-shaped methane hair on the neck bacterium DSM-172068-14 part；Patent No. CN102925494A discloses a kind of method that animal waste produces biogas with crop straw by dry fermentation, the dry substance concentration solid-state feces of livestock and poultry more than 15% is entered anaerobic dry fermentation apparatus according to a certain percentage with the agricultural crop straw through pretreatment together with the activated sludge through domestication, the a small amount of biogas slurry produced in sweat reclaims again as inoculum, and fermentation residues produces fertilizer through secondary compost.Said method can improve and utilizes crops low temperature fermentation biogas, but for most peasants, it is achieved said method has certain difficulty, and the present invention proposes a kind of simple in prior art, it is easy to accomplish the method utilizing agricultural wastes low temperature fermentation biogas.
Summary of the invention
It is an object of the invention to provide a kind of method utilizing agricultural wastes low temperature fermentation biogas; utilize straw-like materials, weeds dry branches and fallen leaves, rice husk, wood flour, fruit/vegetable waste and fecaluria refuse mixed fermentation biogas; realize the method that the energy utilizes with material circulation; aim to solve the problem that scale animal and poultry cultivation and agricultural crop straw have no longer become the main source of China's rural environmental pollution mainly as domestic fuel; solving traditional feces of livestock and poultry anaerobic fermentation simultaneously and produce biogas by seasonal effect greatly, biogas slurry utilizes the problem that technology is not mature enough.
According to above-mentioned purpose, concrete technical scheme is proposed:
The preparation of methane backeria inoculum: (1) contains the anaerobic activated sludge of methane backeria at country sewage canal collected downhole, in its sludge seeding culture medium, will stir 20-30 minute, seal with plastic sheeting, maintain the temperature under 25-30 DEG C of condition, enrichment culture 5-8 days；
The volume ratio of described anaerobic sludge and culture medium is 1:3-6；
Described culture medium consists of: Fructus Mali pumilae shedding or the pears that fall being shredded after making beating and Rhizoma Solani tuber osi residue composition culture medium, mixed proportion is 2-5:1-3；
(2) mud after enrichment culture is carried out methane backeria domestication by low temperature cultivation: methane backeria screening fluid medium parts by weights array becomes: the sodium acetate of 1.21%-1.35%, 0.01%-0.38% sodium chloride, 0.06%-0.12% potassium dihydrogen phosphate, the ammonium chloride of 0.01%-0.05%, the ammonium carbonate of 1.68%-1.85%, 0.91%-1.14% ethanol, excess water, it is configured to fluid medium, water-bath 121 DEG C, sterilizing 20min, after sterilization, 20 DEG C it are cooled to；Mud after enrichment culture is added 3-5 times of water and makes bacteria suspension, be inoculated in fluid medium according to the 12-18% of culture volume, 20 DEG C of Anaerobic culturel 4-6 days, it is thus achieved that bacteria suspension；Take bacterial suspension inoculation again in fluid medium, repeat to cultivate 3-4 time, obtain methane producing composite bacterium；
(3) low temperature methane backeria domestication and culture method: methane backeria is tamed culture medium and is warming up to 15 DEG C, inoculates, by the 10-12% of culture volume, the mixing methane backeria that above-mentioned screening obtains；It is to slowly warm up to 20 DEG C while stirring, stops stirring, constant temperature culture 2-3 days；3-5% then according to basal medium increases culture medium, keeps 22 DEG C constant temperature culture 3-6 days, obtains strain quantity big, the low temperature methane blended bacterium that factor of created gase is high.
Described culture medium is: straw-like materials and fecaluria refuse mixing composition, its mixed proportion is 1-2:1-2；
A kind of method utilizing agricultural wastes low temperature fermentation biogas: put into by fermentation substrate in fermentation tank, inoculates the methane backeria through domestication by low temperature by fermentation substrate weight ratio 8%-15%, adds water cooking liquid or the juice of Fructus Mali pumilae shedding or the pears that fall simultaneously；Stirring is to uniform, and airtight normal temperature fermentation, after aerogenesis is normal, interpolation fermented product, that adds measures the 8%-10% for fermentation substrate every time；When temperature is too low, owing in biogas, the decomposition rate of fermented product is lowered by other bacterium so that the available material of methane backeria reduces factor of created gase and declines；So winter, cold snap factor of created gase to add water cooking liquid or the juice of Fructus Mali pumilae shedding or the pears that fall when declining in time so that the glucide that methane backeria directly utilizes the water cooking liquid of Fructus Mali pumilae shedding or the pears that fall or juice provides ferments, and improves factor of created gase.
Described fermentation substrate: straw-like materials, weeds dry branches and fallen leaves, rice husk, wood flour are pulverized, mixes as fermentation substrate according to the weight ratio of 1-2:1-2:0.1-0.5 with fecaluria refuse, acclimation sludge；The water content simultaneously controlling fermentation substrate reaches 10%-15%；
The Fructus Mali pumilae shedding of described interpolation or the water cooking liquid of the pears that fall or juice are the 50-80% of the methane backeria weight of the domestication by low temperature of inoculation.
The beneficial effects of the present invention is: (1) present invention can realize the utilization of the efficient resources such as feces of livestock and poultry, reach to alleviate the purpose of increasingly serious environmental pollution pressure, and providing reality strong theoretical foundation for renewable clean type energy biogas: (2) present invention is in biogas fermentation, adopt and first methane backeria is carried out domestication by low temperature cultivation, obtain being suitable for the methane backeria of low temperature fermentation biogas, in order to ensure normal factor of created gase when temperature is low；(3) present invention is during the fermentation, when cold snap factor of created gase is low in the winter time, the water cooking liquid or the juice that add Fructus Mali pumilae shedding or the pears that fall provide raw material to improve factor of created gase for methane backeria fermentation, the not only resource of Appropriate application, and solve the problem that the too low factor of created gase caused of temperature is low.
Detailed description of the invention
According to present invention, detailed operational approach is set forth below；
Example 1,
The preparation of methane backeria inoculum: (1) sewer collected downhole contains the anaerobic activated sludge of methane backeria, in its sludge seeding culture medium, will stir 30 minutes, seals with plastic sheeting, maintains the temperature under 25-30 DEG C of condition, enrichment culture 8 days；
The volume ratio of described anaerobic sludge and culture medium is 1:3-6；
Described culture medium consists of: Fructus Mali pumilae shedding or the pears that fall being shredded after making beating and Rhizoma Solani tuber osi residue composition culture medium, mixed proportion is 5:1；
(2) mud after enrichment culture is carried out methane backeria domestication by low temperature cultivation: methane backeria screening fluid medium parts by weights array becomes: the sodium acetate of 1.35%, 0.38% sodium chloride, 0.12% potassium dihydrogen phosphate, 0.05% ammonium chloride, 1.85% ammonium carbonate, 1.14% ethanol, excess water, it is configured to fluid medium, water-bath 121 DEG C, sterilizing 20min, after sterilization, 20 DEG C it are cooled to；Mud after enrichment culture is added 3-5 times of water and makes bacteria suspension, be inoculated in fluid medium according to the 12-18% of culture volume, 20 DEG C of Anaerobic culturel 4-6 days, it is thus achieved that bacteria suspension；Take bacterial suspension inoculation again in fluid medium, repeat to cultivate 3-4 time, obtain methane producing composite bacterium；
(3) low temperature methane backeria domestication and culture method: methane backeria is tamed culture medium and is warming up to 15 DEG C, inoculates, by the 10-12% of culture volume, the mixing methane backeria that above-mentioned screening obtains；It is to slowly warm up to 20 DEG C while stirring, stops stirring, constant temperature culture 2-3 days；3-5% then according to basal medium increases culture medium, keeps 22 DEG C constant temperature culture 3-6 days, obtains strain quantity big, the low temperature methane blended bacterium that factor of created gase is high.
Described culture medium is: straw-like materials and fecaluria refuse mixing composition, its mixed proportion is 2:1；
The preparation of fermentation substrate: straw-like materials, weeds dry branches and fallen leaves, rice husk, wood flour are pulverized, mixes as fermentation substrate according to the weight ratio of 2:1:0.5 with fecaluria refuse, acclimation sludge；The water content simultaneously controlling fermentation substrate reaches 15%；
Fermentation process: put into by fermentation substrate in fermentation tank, inoculates the methane backeria through domestication by low temperature by fermentation substrate weight ratio 15%, simultaneously by the 80% of the methane backeria weight of the domestication by low temperature of the inoculation water cooking liquid adding Fructus Mali pumilae shedding or the pears that fall or juice；Stirring is to uniform, and airtight normal temperature fermentation, after aerogenesis is normal, interpolation fermented product, that adds measures 10% for fermentation substrate every time；When temperature is too low, owing in biogas, the decomposition rate of fermented product is lowered by other bacterium so that the available material of methane backeria reduces factor of created gase and declines；So adding water cooking liquid or the juice of Fructus Mali pumilae shedding or the pears that fall when temperature is too low in time so that the glucide that methane backeria directly utilizes the water cooking liquid of Fructus Mali pumilae shedding or the pears that fall or juice provides ferments, and improves factor of created gase.
Claims (3)
1. the method utilizing agricultural wastes low temperature fermentation biogas, it is characterized in that: fermentation substrate is put in fermentation tank, inoculate the methane backeria through domestication by low temperature by fermentation substrate weight ratio 8%-15%, add water cooking liquid or the juice of Fructus Mali pumilae shedding or the pears that fall simultaneously；Stirring is to uniform, and airtight normal temperature fermentation, after aerogenesis is normal, interpolation fermented product, that adds measures the 8%-10% for fermentation substrate every time；Cold snap factor of created gase to add water cooking liquid or the juice of Fructus Mali pumilae shedding or the pears that fall in time when declining in the winter time so that the glucide that methane backeria directly utilizes the water cooking liquid of Fructus Mali pumilae shedding or the pears that fall or juice provides ferments, and improves factor of created gase.
2. a kind of method utilizing agricultural wastes low temperature fermentation biogas according to claim 1, it is characterised in that: the Fructus Mali pumilae shedding of described interpolation or the water cooking liquid of the pears that fall or juice are the 50-80% of the methane backeria weight of the domestication by low temperature of inoculation.
3. a kind of method utilizing agricultural wastes low temperature fermentation biogas according to claim 1, it is characterized in that: described fermentation substrate is: straw-like materials, weeds dry branches and fallen leaves, rice husk, wood flour are pulverized, mixes as fermentation substrate according to the weight ratio of 1-2:1-2:0.1-0.5 with fecaluria refuse, acclimation sludge；The water content simultaneously controlling fermentation substrate reaches 10%-15%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410842173.8A CN105803004A (en) | 2014-12-30 | 2014-12-30 | Method for low-temperature fermentation of biogas from agricultural waste |
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| CN201410842173.8A CN105803004A (en) | 2014-12-30 | 2014-12-30 | Method for low-temperature fermentation of biogas from agricultural waste |
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| CN105803004A true CN105803004A (en) | 2016-07-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103111A (en) * | 2018-02-28 | 2018-06-01 | 成都德通环境工程有限公司 | A kind of method of Chinese medicine slag fermentation methane production |
| CN108753844A (en) * | 2018-06-27 | 2018-11-06 | 陈盛联 | The method that solid state fermentation animal wastes produce biogas |
| CN109486865A (en) * | 2018-12-30 | 2019-03-19 | 新乡学院 | A kind of method of plant waste producing methane through anaerobic fermentation |
| CN110423800A (en) * | 2019-08-15 | 2019-11-08 | 淮阴师范学院 | High activity methyl coenzyme M reductase extraction process in a kind of methane backeria |
| CN113615505A (en) * | 2021-09-16 | 2021-11-09 | 浙江天地环保科技股份有限公司 | Method for planting single-cropping water bamboo by applying biogas slurry instead of chemical fertilizer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108103111A (en) * | 2018-02-28 | 2018-06-01 | 成都德通环境工程有限公司 | A kind of method of Chinese medicine slag fermentation methane production |
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| CN109486865A (en) * | 2018-12-30 | 2019-03-19 | 新乡学院 | A kind of method of plant waste producing methane through anaerobic fermentation |
| CN110423800A (en) * | 2019-08-15 | 2019-11-08 | 淮阴师范学院 | High activity methyl coenzyme M reductase extraction process in a kind of methane backeria |
| CN113615505A (en) * | 2021-09-16 | 2021-11-09 | 浙江天地环保科技股份有限公司 | Method for planting single-cropping water bamboo by applying biogas slurry instead of chemical fertilizer |
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Application publication date: 20160727 |