CN102199630A - Anaerobic dry fermentation method for generating biogas and used system thereof - Google Patents
Anaerobic dry fermentation method for generating biogas and used system thereof Download PDFInfo
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Abstract
The invention discloses an anaerobic dry fermentation method for generating biogas and a used system thereof. The method uses crop straw as raw material and contains two stages, namely pretreatment and anaerobic fermentation. The pretreatment stage comprises the following steps: crushing crop straw, performing air explosion, adding composite microbial inoculum accounting for 0.1-0.2wt% of crop straw, replenishing water to perform stacking treatment, then mixing the treated crop straw with animal manure to ensure that the carbon nitrogen ratio is 20-30:1 and obtain straw-manure mixture, and using biogas slurry to inoculate after mixing. The anaerobic fermentation stage is that the inoculated straw-manure mixture is utilized to perform anaerobic fermentation at 25-35 DEG C to generate biogas. By adopting the anaerobic dry fermentation method for generating biogas, the cellulose, hemicellulose and lignin of the straw can be effectively degraded, the effect of high biogas output can be achieved, the excessive accumulation of organic acid can be prevented and the internal temperature of the anaerobic reactor can be stable.
Description
Technical field
The present invention relates to utilize the method and apparatus of crop stalk fermentation methane production, relate in particular to a kind of anaerobic dry fermentation and produce the method for biogas and the device of use.
Background technology
The stalk resource of China is very abundant, and annual stalk output reaches 5.7～600,000,000 t, accounts for 20～30% of world's stalk ultimate production.A large amount of stalks turn to open incineration; cause the serious atmospheric pollution and the wasting of resources; the method processing and utilizing stalk that research is suitable for is realized its resource utilization, will become one of important channel of alleviating " grain, the energy, environment " three big crises that current China faces.
Sludge gas dry fermentation is meant with the solid organic waste substances to be raw material, under the condition of no flowing water, carry out the technology of biogas fermentation, solids content in traditional anaerobic digestion process can be brought up to more than 35% by being lower than 8%, dry matter content about 20% is comparatively suitable generally speaking.Dried fermentation has not only improved the pond and has held factor of created gase and Chi Rong efficient, and postdigestive product need not dewater can as fertilizer sources or soil redeposition use, simplified manipulation, reduced cost, these advantages have caused that domestic and international investigator is to doing fermentation in the extensive attention aspect processing domestic waste and the agricultural resistates.
China has begun the dried fermentation research of large-sized biogas at the beginning of 21 century, also be in the lab scale conceptual phase at present.More Zao than China to the sludge gas dry fermentation Study on Technology abroad, the overall technology level is leading than China.From the forties in 20th century, Germany, France and Algeria just begin to use batch type sludge gas dry fermentation technology.The eighties in 20th century, countries such as Germany, Holland, Switzerland, Burkina Faso, the Niger have carried out deep research to sludge gas dry fermentation.
The sludge gas dry fermentation method contains a large amount of Mierocrystalline celluloses because its fermentation raw material is a stalk in the stalk, therefore the material of difficult degraded such as hemicellulose has a strong impact on stalk fermentation and produce biogas efficient.The dry substance concentration of charging is high and problems such as input and output material difficulty, heat and mass that cause are inhomogeneous, natural pond liquid oxypathy are the technological difficulties of sludge gas dry fermentation in the biogas fermentation in addition.
Summary of the invention
The present invention is intended to overcome the deficiency that above prior art exists, and the Mierocrystalline cellulose in a kind of effective degraded straw is provided, and improves the method for the anaerobic dry fermentation product biogas of factor of created gase.
Another object of the present invention provides a kind of anaerobic dry fermentation and produces bionethanation system.
The method that anaerobic dry fermentation of the present invention produces biogas is a raw material with the crop stalk, comprises two stages of pre-treatment and anaerobically fermenting.
Described pre-treatment is: will add 0.1～0.2% after crop stalk fragmentation, the gas explosion in the composite fungus agent of crop stalk quality, and moisturizing to make the mass percent of water in the mixture be 60～70% back stack rettings 3～5 days, crop stalk after then stack retting being handled mixes with animal excrement, making carbon-nitrogen ratio is 20～30:1, preferably 25:1 gets straw ight soil mixture, mixing the back inoculates with natural pond liquid, natural pond liquid inoculum size is 20% of a straw ight soil mixture quality, and the massfraction 80% of water in the straw ight soil mixture is adjusted by adding water in natural pond liquid inoculation back.
Described anaerobically fermenting is: postvaccinal straw ight soil mixture is carried out anaerobically fermenting at 25～35 ℃ produce biogas, be advisable with 29～31 ℃, preferably keep about 30 ℃, in anaerobic fermentation process, and what the recirculated water heating boiler by anaerobic reactor kept straw ight soil mixture keeps the anaerobically fermenting temperature, the employed fuel of recirculated water heating boiler is the biogas that produces in the anaerobic reactor, the natural pond slag that produces in the anaerobic fermentation process is after plate-and-frame filter press filters, dehydration natural pond slag reclaims as farmland fertilizer, natural pond liquid is used for the inoculation of straw ight soil mixture, thereby realizes the recycle of natural pond liquid.
Preferably, the mass ratio of animal excrement and crop stalk is 1:1, ferment effect the best when the carbon-nitrogen ratio of mixture is 25:1.
Further, in anaerobic fermentation process, adopt the mode that refluxes that the material in the anaerobic reactor is stirred, in reactor start-up initial stage and stable phase, adopt different circulating flow strengths and backflow intermittent time, guarantee the higher factor of created gase level that reaches of pig manure and stalk mixture.In aerogenesis initial stage (1-6 days), start reflux pump every 30min the mixture in the reactor is stirred 10min.Start reflux pump in gas production vigorous period (7-20 days) every 1h the mixture in the reactor is stirred 5min.Adopt this alr mode, can effectively prevent the organic acid excess accumulation.
Described crop stalk is one or more in corn stalk, straw or the rice bar; Described animal excrement are pig manure; Added water is one or more in liquid dung, pond water, river, tap water or the well water in the preprocessing process, and the pH value of various water is 6.5～7.5.
Each bacterial strain in the described composite fungus agent is formed and the percentage composition of cell count in the total cell count of composite fungus agent of each bacterial strain is: fermentation Cytophaga 8-15%, molten paper rib bacterium 25-30%, Pasteur's sarcina methanica 15-25%, Wu Shi bacillus aceticus 5-10%, the plain Zymomonas mobilis 2-5% of product yellowish fiber, Butyrivibrio fibrisolvens 4-10%, product cellobiose rib bacterium 3-5%, termite clostridium 1-5%, Wolf association Zymomonas mobilis 10-15%.
The employed anaerobic dry fermentation of product biogas method of the present invention produces bionethanation system, comprises ight soil basin, mixing tank and anaerobic reactor; Described ight soil basin is communicated with by pipeline and mixing tank, and is provided with first transferpump between ight soil basin and the mixing tank; Described mixing tank is communicated with anaerobic reactor by pipeline, and is provided with second transferpump between mixing tank and the anaerobic reactor; The anaerobic reactor outer setting has the recirculated water heating boiler, the anaerobic reactor bottom is provided with phegma outlet and natural pond slag outlet, the phegma outlet is communicated with the opening for feed of anaerobic reactor by reflux pump, natural pond slag discharge outlet is deposited the pond with the natural pond slag and is connected, the natural pond slag is deposited the pond and is connected plate-and-frame filter press by carrying transport pipe, and the natural pond slag is deposited between pond and the fishplate bar frame pressure filter and is provided with the 3rd transferpump; Plate-and-frame filter press also is communicated with mixing tank by transport pipe, be provided with the 4th transferpump between plate-and-frame filter press and the mixing tank, make mixing tank, second transferpump, anaerobic reactor, natural pond slag deposit pond, the 3rd transferpump, plate-and-frame filter press, loop line of the 4th transferpump formation.
Beneficial effect of the present invention is as follows:
1, in the fermentation pre-treatment straw utilization composite fungus agent stack retting after the gas explosion is handled, effectively Mierocrystalline cellulose in the degrading straw reaches high yield gas rate effect.
2, design feeding-in solid body concentration is about 20%, under this concentration, can utilize pump that stalk pig manure mixture is fed in the anaerobic reactor, utilizes gravity to drain unnecessary natural pond slag simultaneously, keeps system's material balance.
3, by regularly natural pond liquid backflow every day, guarantee that mixing of materials is even in the anaerobic reactor, prevent the organic acid excess accumulation.
4, utilize boiler outer circulation water, keep the anaerobic reaction actuator temperature about 30 degrees centigrade, simultaneously because natural pond liquid backflow effect guarantees temperature equalisation in the anaerobic reactor.
Description of drawings
Fig. 1 anaerobic dry fermentation of the present invention produces the schema of the method for biogas;
Fig. 2 is the system diagram that anaerobic dry fermentation of the present invention produces biogas.
Mark is illustrated as among the figure: 1-ight soil basin, 2-mixing tank, 3-anaerobic reactor, 4-plate-and-frame filter press, 5-natural pond slag are deposited pond, 6-recirculated water heating boiler, 7-the 4th transferpump, 8-reflux pump, 9-second transferpump, 10-first transferpump, 11-the 3rd transferpump.
Embodiment
Embodiment 1
The method that the described anaerobic dry fermentation of present embodiment produces biogas is a raw material with the crop stalk, comprises two stages of pre-treatment and anaerobically fermenting.
Described pre-treatment is: will add 0.1% after corn stalk fragmentation, the gas explosion in the composite fungus agent of corn stalk quality, and moisturizing to make the mass percent of water in the mixture be 60% back stack retting 4 days, corn stalk after then stack retting being handled mixes with pig manure, making carbon-nitrogen ratio is that 20:1 gets straw ight soil mixture, mixing the back inoculates with natural pond liquid, natural pond liquid inoculum size is 20% of a straw ight soil mixture quality, and the massfraction 80% of water in the straw ight soil mixture is adjusted by adding water in natural pond liquid inoculation back.
Described anaerobically fermenting is: postvaccinal straw ight soil mixture is carried out anaerobically fermenting at 25 ℃ produce biogas, the natural pond slag that produces in the anaerobic fermentation process is after plate-and-frame filter press filters, dehydration natural pond slag reclaims as farmland fertilizer, natural pond liquid is used for the inoculation of straw ight soil mixture, thereby realizes the recycle of natural pond liquid.
Each bacterial strain in the described composite fungus agent is formed and the percentage composition of cell count in the total cell count of composite fungus agent of each bacterial strain is: fermentation Cytophaga 8%, molten paper rib bacterium 30%, Pasteur's sarcina methanica 15%, Wu Shi bacillus aceticus 10%, the plain Zymomonas mobilis 5% of product yellowish fiber, Butyrivibrio fibrisolvens 4%, product cellobiose rib bacterium 5%, termite clostridium 1%, Wolf association Zymomonas mobilis 15%.
In anaerobic fermentation process, adopt the mode that refluxes that the material in the anaerobic reactor is stirred, in reactor start-up initial stage and stable phase, adopt different circulating flow strengths and backflow intermittent time, guarantee the higher factor of created gase level that reaches of pig manure and stalk mixture.In aerogenesis initial stage (1-6 days), start reflux pump every 30min the mixture in the reactor is stirred 10min.Start reflux pump in gas production vigorous period (7-20 days) every 1h the mixture in the reactor is stirred 5min.Adopt this alr mode, can effectively prevent the organic acid excess accumulation.
The employed anaerobic dry fermentation of product biogas method of the present invention produces bionethanation system, comprises ight soil basin 1, mixing tank 2 and anaerobic reactor 3; Ight soil basin 1 is communicated with by pipeline and mixing tank 2, and is provided with first transferpump 10 between ight soil basin 1 and the mixing tank 2; Mixing tank 2 is communicated with anaerobic reactor 3 by pipeline, and is provided with second transferpump 9 between mixing tank 2 and the anaerobic reactor 3; Anaerobic reactor 3 outer setting have recirculated water heating boiler 6, recirculated water heating boiler 6 employed fuel are the biogas that anaerobic reactor produces, anaerobic reactor 3 bottoms are provided with phegma outlet and natural pond slag outlet, the phegma outlet is communicated with the opening for feed of anaerobic reactor by reflux pump 8, the natural pond slag outlet is deposited pond 5 with the natural pond slag and is connected, the natural pond slag is deposited pond 5 and is connected plate-and-frame filter press 4 by carrying transport pipe, and the natural pond slag is deposited and is provided with the 3rd transferpump 11 between pond 5 and the plate-and-frame filter press 4; Plate-and-frame filter press 4 also is communicated with mixing tank 2 by transport pipe, be provided with the 4th transferpump 7 between plate-and-frame filter press 4 and the mixing tank 2, make mixing tank 2, second transferpump 9, anaerobic reactor 3, natural pond slag deposit pond 5, the 3rd transferpump 11, plate-and-frame filter press 4, loop line of the 4th transferpump 7 formation.
Embodiment 2
The method that the described anaerobic dry fermentation of present embodiment produces biogas is a raw material with the crop stalk, comprises two stages of pre-treatment and anaerobically fermenting.
Described pre-treatment is: will add 0.2% after wheat straw fragmentation, the gas explosion in the composite fungus agent of wheat straw quality, and moisturizing to make the mass percent of water in the mixture be 70% back stack retting 4 days, wheat straw after then stack retting being handled mixes by mass ratio 1:1 with pig manure, making carbon-nitrogen ratio is that 25:1 gets straw ight soil mixture, mixing the back inoculates with natural pond liquid, natural pond liquid inoculum size is 20% of a straw ight soil mixture quality, and the massfraction 80% of water in the straw ight soil mixture is adjusted by adding water in natural pond liquid inoculation back.
Described anaerobically fermenting is: postvaccinal straw ight soil mixture is carried out anaerobically fermenting at 35 ℃ produce biogas, the natural pond slag that produces in the anaerobic fermentation process is after plate-and-frame filter press filters, dehydration natural pond slag reclaims as farmland fertilizer, natural pond liquid is used for the inoculation of straw ight soil mixture, thereby realizes the recycle of natural pond liquid.
Each bacterial strain in the described composite fungus agent is formed and the percentage composition of cell count in the total cell count of composite fungus agent of each bacterial strain is: fermentation Cytophaga 15%, molten paper rib bacterium 27%, Pasteur's sarcina methanica 20%, Wu Shi bacillus aceticus 7%, the plain Zymomonas mobilis 4% of product yellowish fiber, Butyrivibrio fibrisolvens 7%, product cellobiose rib bacterium 3%, termite clostridium 3%, Wolf association Zymomonas mobilis 10%.
In anaerobic fermentation process, adopt the mode that refluxes that the material in the anaerobic reactor is stirred, in reactor start-up initial stage and stable phase, adopt different circulating flow strengths and backflow intermittent time, guarantee the higher factor of created gase level that reaches of pig manure and stalk mixture.In aerogenesis initial stage (1-6 days), start reflux pump every 30min the mixture in the reactor is stirred 10min.Start reflux pump in gas production vigorous period (7-20 days) every 1h the mixture in the reactor is stirred 5min.Adopt this alr mode, can effectively prevent the organic acid excess accumulation.
To produce bionethanation system identical with system among the embodiment 1 for employed anaerobic dry fermentation in the present embodiment.
Embodiment 3
The method that the described anaerobic dry fermentation of present embodiment produces biogas is a raw material with the crop stalk, comprises two stages of pre-treatment and anaerobically fermenting.
Described pre-treatment is: will add 0.15% after paddy stalk fragmentation, the gas explosion in the composite fungus agent of paddy stalk quality, and moisturizing to make the mass percent of water in the mixture be 65% back stack retting 4 days, paddy stalk after then stack retting being handled mixes with pig manure, making carbon-nitrogen ratio is that 30:1 gets straw ight soil mixture, mixing the back inoculates with natural pond liquid, natural pond liquid inoculum size is 20% of a straw ight soil mixture quality, and the massfraction 80% of water in the straw ight soil mixture is adjusted by adding water in natural pond liquid inoculation back.
Described anaerobically fermenting is: postvaccinal straw ight soil mixture is carried out anaerobically fermenting at 30 ℃ produce biogas, the natural pond slag that produces in the anaerobic fermentation process is after plate-and-frame filter press filters, dehydration natural pond slag reclaims as farmland fertilizer, natural pond liquid is used for the inoculation of straw ight soil mixture, thereby realizes the recycle of natural pond liquid.
Each bacterial strain in the described composite fungus agent is formed and the percentage composition of cell count in the total cell count of composite fungus agent of each bacterial strain is: fermentation Cytophaga 12%, molten paper rib bacterium 25%, Pasteur's sarcina methanica 25%, Wu Shi bacillus aceticus 5%, the plain Zymomonas mobilis 5% of product yellowish fiber, Butyrivibrio fibrisolvens 10%, product cellobiose rib bacterium 4%, termite clostridium 5%, Wolf association Zymomonas mobilis 13%.
In anaerobic fermentation process, adopt the mode that refluxes that the material in the anaerobic reactor is stirred, in reactor start-up initial stage and stable phase, adopt different circulating flow strengths and backflow intermittent time, guarantee the higher factor of created gase level that reaches of pig manure and stalk mixture.In aerogenesis initial stage (1-6 days), start reflux pump every 30min the mixture in the reactor is stirred 10min.Start reflux pump in gas production vigorous period (7-20 days) every 1h the mixture in the reactor is stirred 5min.Adopt this alr mode, can effectively prevent the organic acid excess accumulation.
The system that employed anaerobic dry fermentation produces among the bionethanation system embodiment 1 in the present embodiment is identical.
In concrete the enforcement, employed raw material can also be to remove other listed crop stalk among the embodiment, and the water of being added can be liquid dung, pond water, river, tap water or well water.
The characteristic of various bacterium in the composite fungus agent described in the present invention and originate as follows:
Fermentation Cytophaga (Cytophaga fermentans): cell is flexible shaft-like, amphimicrobian, and decomposition of cellulose produces acetate, propionic acid, succsinic acid, H2 and CO2 etc. under the aerobic conditions, can produce yellow pigment simultaneously; Bacterial strain deposit number ATCC 19072, DSM 9555
Wu Shi bacillus aceticus (Acetobacterium woodii): cell ellipse or quarter butt, Dan Sheng becomes chain rupture in pairs once in a while, strictly anaerobic, hydrogen oxide, reduction CO2 generate acetate, and also ferment fructose and other substrates produce acetate; Bacterial strain deposit number ATCC 29683, DSM 1030
Produce the plain Zymomonas mobilis (Cellulomonas flavigena) of yellowish fiber: elongated rod-shaped, the energy decomposition of cellulose can also utilize glucose and other carbohydrate to produce acid under aerobic and anaerobic condition; Bacterial strain deposit number ATCC 482, DSM 20109
Butyrivibrio fibrisolvens (Butyrivibrio fibrisolvens), vibrios, strictly anaerobic, decomposition of cellulose produces organic acid, can produce the hemicellulase of degradation of hemicellulose simultaneously; Bacterial strain deposit number ATCC 19171, DSM3071
Molten paper rib bacterium (Clostridium papyrosolvens): bending or direct rod shape, hydrocellulose produces cellobiose etc.; Bacterial strain deposit number ATCC 35413, DSM 2782
Produce cellobiose rib bacterium (Clostridium cellobioparum): bending or direct rod shape, hydrocellulose produces cellobiose etc.; Bacterial strain deposit number ATCC 15832, DSM 1351
The termite clostridium(Clostridium termitidis): bending or direct rod shape, hydrocellulose produces acetate, ethanol and H2 etc.; Bacterial strain deposit number ATCC51846, DSM5398
Wolf association Zymomonas mobilis (Syntrophomonas Wolfei): slight screw shaped, do not produce gemma, decompose butyric acid and produce acetate and H2; Bacterial strain deposit number ATCC 43021, DSM4212
Pasteur's sarcina methanica (Methanosarcina barkeri): asymmetric sphere, can irregular gathering agglomerating, utilize methyl alcohol, Trimethylamine 99, acetate and H2/CO2 growth to produce methane.Bacterial strain deposit number ATCC43241, DSM1538
Above bacterial strain is all bought from the ATCC of USS type culture collection institute by Central Plains, Beijing corporate agent.
Claims (10)
1. the method that anaerobic dry fermentation produces biogas is a raw material with the crop stalk, comprises two stages of pre-treatment and anaerobically fermenting, it is characterized in that:
Described pre-treatment is: will add 0.1～0.2% after crop stalk fragmentation, the gas explosion in the composite fungus agent of crop stalk quality, and the laggard windrow of moisturizing is macerated processing, crop stalk after then stack retting being handled mixes with animal excrement, making carbon-nitrogen ratio is 20～30:1, get straw ight soil mixture, mix the back and inoculate with natural pond liquid;
Described anaerobically fermenting is: postvaccinal straw ight soil mixture is carried out anaerobically fermenting at 25～35 ℃ produce biogas.
2. anaerobic dry fermentation according to claim 1 produces the method for biogas, it is characterized in that, the natural pond slag that anaerobically fermenting produces is after plate-and-frame filter press filters, and dehydration natural pond slag reclaims as farmland fertilizer, and natural pond liquid is used for the inoculation of straw ight soil mixture.
3. anaerobic dry fermentation according to claim 1 produces the method for biogas, it is characterized in that: after crop stalk added composite fungus agent and moisturizing, the mass percent of water was 60～70% in the mixture.
4. anaerobic dry fermentation according to claim 1 produces the method for biogas, and it is characterized in that: the described stack retting time is 3-5 days.
5. anaerobic dry fermentation according to claim 1 produces the method for biogas, and it is characterized in that: the inoculum size of natural pond liquid is 20% of a straw ight soil mixture quality, and the massfraction 80% of water in the straw ight soil mixture is adjusted by adding water in natural pond liquid inoculation back.
6. anaerobic dry fermentation according to claim 1 produces the method for biogas, and it is characterized in that: the mass ratio of animal excrement and crop stalk is 1:1, and the carbon-nitrogen ratio of mixture is 25:1.
7. anaerobic dry fermentation according to claim 1 produces the method for biogas, it is characterized in that: in anaerobic fermentation process, adopt the mode that refluxes that the material in the anaerobic reactor is stirred, and it is 29～31 ℃ that the recirculated water heating boiler by anaerobic reactor keeps the anaerobically fermenting temperature of straw ight soil mixture, and the employed fuel of recirculated water heating boiler is the biogas that produces in the anaerobic reactor.
8. anaerobic dry fermentation according to claim 1 produces the method for biogas, and it is characterized in that: described crop stalk is one or more in corn stalk, straw or the rice bar; Described animal excrement are pig manure; Added water is one or more in liquid dung, pond water, river, tap water or the well water in the preprocessing process, and the pH value of various water is 6.5～7.5.
9. the method for producing biogas according to each described anaerobic dry fermentation of claim 1～8, it is characterized in that: anaerobic dry fermentation according to claim 1 produces the method for biogas, it is characterized in that each bacterial strain in the described composite fungus agent is formed and the percentage composition of cell count in the total cell count of composite fungus agent of each bacterial strain is: fermentation Cytophaga 8-15%, molten paper rib bacterium 25-30%, Pasteur's sarcina methanica 15-25%, Wu Shi bacillus aceticus 5-10%, produce the plain Zymomonas mobilis 2-5% of yellowish fiber, Butyrivibrio fibrisolvens 4-10%, produce cellobiose rib bacterium 3-5%, termite clostridium 1-5%, Wolf association Zymomonas mobilis 10-15%.
10. an anaerobic dry fermentation produces bionethanation system, it is characterized in that: comprise ight soil basin, mixing tank and anaerobic reactor; Described ight soil basin is communicated with by pipeline and mixing tank, and is provided with first transferpump between ight soil basin and the mixing tank; Described mixing tank is communicated with anaerobic reactor by pipeline, and is provided with second transferpump between mixing tank and the anaerobic reactor; The anaerobic reactor outer setting has the recirculated water heating boiler, the anaerobic reactor bottom is provided with phegma outlet and natural pond slag outlet, the phegma outlet is communicated with the opening for feed of anaerobic reactor by reflux pump, the natural pond slag outlet is deposited the pond with the natural pond slag and is connected, the natural pond slag is deposited the pond and is connected plate-and-frame filter press by carrying transport pipe, and the natural pond slag is deposited between pond and the fishplate bar frame pressure filter and is provided with the 3rd transferpump; Plate-and-frame filter press also is communicated with mixing tank by transport pipe, be provided with the 4th transferpump between plate-and-frame filter press and the mixing tank, make mixing tank, second transferpump, anaerobic reactor, natural pond slag deposit pond, the 3rd transferpump, plate-and-frame filter press, loop line of the 4th transferpump formation.
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| CN102978274A (en) * | 2012-12-09 | 2013-03-20 | 哈尔滨工业大学宜兴环保研究院 | Method for applying anaerobic dry fermentation technology to treating rice straws to prepare biological flocculating agent |
| CN102994561A (en) * | 2012-10-09 | 2013-03-27 | 贵州泰然环境科技有限责任公司 | Method for generating biogas by using cornstalk through dry fermentation |
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| CN105420284A (en) * | 2015-12-17 | 2016-03-23 | 广西壮族自治区林业科学研究院 | Method for preparing biogas by rice straw |
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| CN105969835A (en) * | 2015-06-25 | 2016-09-28 | 中农绿能（北京）科技有限公司 | Method for preparing methane by straw and excrement co-fermentation |
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| CN107475305A (en) * | 2017-09-19 | 2017-12-15 | 广西壮族自治区林业科学研究院 | A kind of preparation method of biogas mixture fermentation raw material |
| CN108410715A (en) * | 2018-04-02 | 2018-08-17 | 安徽师范大学 | A kind of lignocellulose raw material high solid methane phase system and its process |
| CN108676708A (en) * | 2018-04-13 | 2018-10-19 | 苏州爱绿环保科技有限公司 | A kind of house refuse producing methane system |
| CN108753844A (en) * | 2018-06-27 | 2018-11-06 | 陈盛联 | The method that solid state fermentation animal wastes produce biogas |
| CN109112165A (en) * | 2018-11-08 | 2019-01-01 | 中国电建集团河南省电力勘探设计院有限公司 | A kind of raw process for producing biogas of excrement stalk mixed fermentation |
| CN109852545A (en) * | 2019-01-15 | 2019-06-07 | 三河市盈盛生物能源科技有限公司 | A kind of biogas equipment |
| CN113403344A (en) * | 2012-06-12 | 2021-09-17 | 雷内科学有限公司 | Methods and compositions for biomethane production |
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| CN108676708A (en) * | 2018-04-13 | 2018-10-19 | 苏州爱绿环保科技有限公司 | A kind of house refuse producing methane system |
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| CN109112165A (en) * | 2018-11-08 | 2019-01-01 | 中国电建集团河南省电力勘探设计院有限公司 | A kind of raw process for producing biogas of excrement stalk mixed fermentation |
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