CN102925494A - Method for producing methane by dry fermentation of beast and bird wastes and crop straws - Google Patents
Method for producing methane by dry fermentation of beast and bird wastes and crop straws Download PDFInfo
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- CN102925494A CN102925494A CN2012104767954A CN201210476795A CN102925494A CN 102925494 A CN102925494 A CN 102925494A CN 2012104767954 A CN2012104767954 A CN 2012104767954A CN 201210476795 A CN201210476795 A CN 201210476795A CN 102925494 A CN102925494 A CN 102925494A
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- 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
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
The invention discloses a method for producing methane by dry fermentation of beast and bird wastes and crop straws. According to the method, solid beast and bird excrements with the dry material concentration of higher than 15% and crop straws which is subjected to pre-treatment are mixed according to a certain ratio and introduced to an anaerobic dry fermenting device together with naturalized active mud; a small deal of biogas slurry is recovered as inoculums, and fermentation residues are subjected to secondary compost to produce organic fertilizer. The method has the following advantages of high gas generation speed and high fermentation efficiency; the methane content is up to 50-65% which can meet the using demands of power generation and diary gas appliances; the produced organic fertilizer is unlikely to cause ammonia poison; eggs are killed completely; and the nitrogen fertilizer loss is low.
Description
Technical field
The present invention relates to a kind of feces of livestock and poultry and crop straw by dry fermentation and produce the method for biogas and fertilizer; the solid waste that belongs to environmental engineering is processed and the biogas engineering field, is mainly used in the comprehensive utilization of the solid-state ight soil of mass-producing livestock and poultry farm and agricultural crop straw.
Background technology
Biogas fermentation mode when dry-type anaerobic fermentation typically refers to the fermented liquid total solid concentration and surpasses 15%.Compare with the wet type anaerobically fermenting, that the dry-type anaerobic fermentation technological operation is processed is simple, water saving, that cost is low, the pond holds efficient is high, can not bring simultaneously secondary pollution discharging and processing problem at acquisition biogas, compare with wet fermentation simultaneously, dried fermentation fertilizer nutrient loss is little, is a kind of very promising technological approaches.China has abundant Biomass Energy Resources, mainly comprises agricultural crop straw, fowl and animal excrement, domestic refuse etc.Statistic data in 2005 shows, Crop in China stalk year generation reaches 7.2 hundred million t, feces of livestock and poultry year generation reach 20.1 hundred million t (weight in wet base).It is one of developing direction of future source of energy agricultural that the stalk dry-type anaerobic fermentation produces biogas technology.Utilize the dry-type anaerobic fermentation technology that agricultural solid residue is converted into biogas, and then be used for combustion heat supplying or generating, for obtaining novel energy and controlling Rural Plane Source Pollution positive effect is arranged.
Summary of the invention
The invention provides feces of livestock and poultry and crop straw by dry fermentation and produce the method for biogas and fertilizer; realize the method that the energy and material cycle are utilized; being intended to solve scale animal and poultry cultivation and agricultural crop straw has no longer become the main source of China's rural environmental pollution mainly as household fuel; the problem of easily exerting heavy pressures on to ecotope; simultaneously traditional feces of livestock and poultry anaerobically fermenting is produced biogas and is subjected to seasonal effect large; natural pond liquid utilizes technology not mature enough; the input and output material trouble; produce the impact of fertilizer climate large; Odor con trol is poor; the composting time is long, the pathogenic bacteria in the waste and worm's ovum etc. is killed not thorough, affects the problem of organic fertilizer product quality.
The embodiment of the invention is achieved in that the method that a kind of feces of livestock and poultry and crop straw by dry fermentation are produced biogas and fertilizer, said method comprising the steps of:
Step 1, utilize chaffcutter chopping to suitable granularity agricultural crop straw, add an amount of composite fungus agent, be covered with the white hypha stalk and become more loose soft rear for subsequent use wait growing the stalk surface in stack retting 5-7 days;
Step 2, get the active bed mud of the 50% normal methane-generating pit of producing and fresh cow dung mixing, if active bed mud is inconvenient, also can 100% use fresh cow dung, the stalk adjusting carbon-nitrogen ratio 25-30 for preparing with step 1 simultaneously: 1, use Ca (OH)
2Solution is regulated about PH to 7, drops into the anaerobically fermenting pond, the airtight rear normal temperature fermentation of mixing, after aerogenesis is normal, according to 1: 1 said mixture is used the feces of livestock and poultry mixings that ferment with treating a large amount of production, regulate carbon-nitrogen ratio 25-30 with the stalk of step 1 preparation: 1, use Ca (OH
)2 solution are regulated about PH to 7, behind the normal gas producing, with fermentation material as inoculum is for subsequent use first;
Step 3, according to 2: 1 will through separating dry space from moist space or not fresh the or old feces of livestock and poultry of separating dry space from moist space all can drop into fermentation vat with above-mentioned pretreated stalk, add some amount step 2 through the active fermentation material fermentation of domestication, stalk with step 1 preparation is regulated carbon-nitrogen ratio 25-30: 1, and with Ca (OH)
2Solution is regulated about PH to 7;
The a small amount of natural pond liquid that produces in step 4, the collection fermenting process, as the inoculum that ferments next time, fermenting process is without discharging of waste liquid;
Step 5, collect biogas for the production of, life or generating, utilize simultaneously biogas to ensure the heating of fermentation vat low temperature season, improve fermentation efficiency;
Step 6, natural pond slag partly are used for Secondary Fermentation and produce fertilizer, part is used for secondary inoculation as inoculum, strengthens inoculum size for the fermentation vat without heating unit at low temperature season and can reduce the VFA accumulation, the prevention oxypathy, can improve aerogenesis speed, improve fermentation efficiency.
Further, utilize chaffcutter to shred to the 2.0cm agricultural crop straw, add approximately 5% composite fungus agent (according to volume calculation), be covered with the white hypha stalk and become more loose for subsequent use after soft wait growing the stalk surface in stack retting 5-7 days;
Further, behind the normal gas producing, as inoculum is for subsequent use first, for the first time preparation of inoculum requires in temperature more than 25 ℃ with fermentation material.
Further, described fresh pig manure can also specifically adopt other feces of livestock and poultry to replace according to producer's needs of production.
Further, be provided with water port at the bottom of the described fermentation vat, utilize U-shaped pipe principle to collect the natural pond liquid of fermenting process generation as inoculum.
Further, collect a small amount of natural pond liquid that produces in the fermenting process, account for the heavy 2-3% of fermentation materials, relevant with the TS content that drops into material.
Further, the biogas concentration of collection generally is stabilized in 50-65%.
The invention discloses a kind of method of utilizing animal waste and crop straws for producing biogas and fertilizer, with dry substance concentration greater than 15% solid-state feces of livestock and poultry with entering anaerobic dry fermentation apparatus with active sludge through domestication according to a certain percentage through pretreated agricultural crop straw, the a small amount of natural pond liquid that produces in the fermenting process reclaims again as inoculum, and the fermentation resistates is produced fertilizer through the secondary compost.It is fast that the present invention has aerogenesis, the advantage that fermentation efficiency is high, and methane content reaches 50-65%, can satisfy daily burner generating needs, and the fertilizer of production does not produce ammonia and poisons, sick worm's ovum thorough killing, loss of nitrogen fertilizer is few.
Description of drawings
Fig. 1 is that feces of livestock and poultry and the crop straw by dry fermentation that the embodiment of the invention provides produced the schema of the method for biogas and fertilizer.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the flow process that feces of livestock and poultry that the embodiment of the invention provides and crop straw by dry fermentation are produced the method for biogas and fertilizer, and the method specifically may further comprise the steps:
1, agricultural crop straw is utilized chaffcutter shred to the 2.0cm, add approximately 5% composite fungus agent (according to volume calculation), be covered with the white hypha stalk and become more loose for subsequent use after soft wait growing the stalk surface in stack retting 5-7 days;
2, get the active bed mud of the 50% normal methane-generating pit of producing and fresh cow dung mixing (if active bed mud is inconvenient, also can 100% use fresh cow dung), the stalk adjusting carbon-nitrogen ratio 25-30 for preparing with step 1 simultaneously: 1, use Ca (OH)
2Solution is regulated about PH to 7, drops into the anaerobically fermenting pond, the airtight rear normal temperature fermentation of mixing, after aerogenesis is normal, according to 1: 1 said mixture is used the feces of livestock and poultry mixings that ferment with treating a large amount of production, regulate carbon-nitrogen ratio 25-30 with the stalk of step 1 preparation: 1, use Ca (OH)
2Solution is regulated about PH to 7, behind the normal gas producing, with fermentation material as inoculum first (for the first time preparation of inoculum requirement in temperature more than 25 ℃) for subsequent use;
3, according to 2: 1 will through separating dry space from moist space or not fresh the or old feces of livestock and poultry of separating dry space from moist space all can drop into fermentation vat with above-mentioned pretreated stalk, adding some amount step 2 (suitably strengthens inoculum size and is conducive to improve fermentation efficiency through the active fermentation material fermentation of taming, but can shorten the material cycling cycle) regulate carbon-nitrogen ratio 25-30 with the stalk of step 1 preparation: 1, with Ca (OH)
2Solution is regulated about PH to 7;
4, collect a small amount of natural pond liquid (accounting for the heavy 2-3% of fermentation materials, relevant with the TS content that drops into material) that produces in the fermenting process, as the inoculum that ferments next time, fermenting process is without discharging of waste liquid.
5, collect biogas (methane concentration generally is stabilized in 50-65%) for the production of, life or generating, utilize simultaneously biogas to ensure the heating of fermentation vat low temperature season, improve fermentation efficiency.
6, the natural pond slag partly is used for Secondary Fermentation production fertilizer, part is used for secondary inoculation as inoculum, strengthens inoculum size for the fermentation vat without heating unit at low temperature season and can reduce the VFA accumulation, the prevention oxypathy, can improve aerogenesis speed, improve fermentation efficiency.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a feces of livestock and poultry and crop straw by dry fermentation are produced the method for biogas and fertilizer, it is characterized in that, said method comprising the steps of:
Step 1, utilize chaffcutter chopping to suitable granularity agricultural crop straw, add an amount of composite fungus agent, be covered with the white hypha stalk and become more loose soft rear for subsequent use wait growing the stalk surface in stack retting 5-7 days;
Step 2, get the active bed mud of the 50% normal methane-generating pit of producing and fresh cow dung mixing, if active bed mud is inconvenient, also can 100% use fresh cow dung, the stalk adjusting carbon-nitrogen ratio for preparing with step 1 simultaneously is to 25-30: 1, use Ca (OH)
2Solution is regulated about PH to 7, drops into the anaerobically fermenting pond, the airtight rear normal temperature fermentation of mixing, after aerogenesis is normal, according to 1: 1 said mixture is used the feces of livestock and poultry mixings that ferment with treating a large amount of production, regulate carbon-nitrogen ratio 25-30 with the stalk of step 1 preparation: 1, use Ca (OH)
2Solution is regulated about PH to 7, behind the normal gas producing, with fermentation material as inoculum is for subsequent use first;
Step 3, according to 2: 1 will through separating dry space from moist space or not fresh the or old feces of livestock and poultry of separating dry space from moist space all can drop into fermentation vat with above-mentioned pretreated stalk, add some amount step 2 through the active fermentation material fermentation of domestication, stalk with step 1 preparation is regulated carbon-nitrogen ratio 25-30: 1, and with Ca (OH)
2Solution is regulated about PH to 7;
The a small amount of natural pond liquid that produces in step 4, the collection fermenting process, as the inoculum that ferments next time, fermenting process is without discharging of waste liquid;
Step 5, collect biogas for the production of, life or generating, utilize simultaneously biogas to ensure the heating of fermentation vat low temperature season, improve fermentation efficiency;
Step 6, natural pond slag partly are used for Secondary Fermentation and produce fertilizer, part is used for secondary inoculation as inoculum, strengthens inoculum size for the fermentation vat without heating unit at low temperature season and can reduce the VFA accumulation, the prevention oxypathy, can improve aerogenesis speed, improve fermentation efficiency.
2. feces of livestock and poultry as claimed in claim 1 and crop straw by dry fermentation are produced the method for biogas and fertilizer, it is characterized in that, utilize chaffcutter to shred to the 2.0cm agricultural crop straw, add approximately 5% composite fungus agent (according to volume calculation), be covered with the white hypha stalk and become more loose for subsequent use after soft wait growing the stalk surface in stack retting 5-7 days.
3. feces of livestock and poultry as claimed in claim 1 and crop straw by dry fermentation are produced the method for biogas and fertilizer, it is characterized in that, behind the normal gas producing, as inoculum is for subsequent use first, for the first time preparation of inoculum requires in temperature more than 25 ℃ with fermentation material.
4. feces of livestock and poultry as claimed in claim 1 and crop straw by dry fermentation are produced the method for biogas and fertilizer, it is characterized in that, described fresh pig manure can also specifically adopt other feces of livestock and poultry to replace according to producer's needs of production.
5. feces of livestock and poultry as claimed in claim 1 and crop straw by dry fermentation are produced the method for biogas and fertilizer, it is characterized in that, are provided with water port at the bottom of the described fermentation vat, utilize U-shaped pipe principle to collect the natural pond liquid of fermenting process generation as inoculum.
6. feces of livestock and poultry as claimed in claim 1 and crop straw by dry fermentation are produced the method for biogas and fertilizer, it is characterized in that, collect a small amount of natural pond liquid that produces in the fermenting process, account for the heavy 2-3% of fermentation materials, and be relevant with the TS content that drops into material.
7. feces of livestock and poultry as claimed in claim 1 and crop straw by dry fermentation are produced the method for biogas and fertilizer, it is characterized in that, the fire damp concentration of collection generally is stabilized in 50-65%.
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| CN2012104767954A CN102925494A (en) | 2012-11-22 | 2012-11-22 | Method for producing methane by dry fermentation of beast and bird wastes and crop straws |
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| CN2012104767954A CN102925494A (en) | 2012-11-22 | 2012-11-22 | Method for producing methane by dry fermentation of beast and bird wastes and crop straws |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304286A (en) * | 2013-06-24 | 2013-09-18 | 重庆光大(集团)有限公司 | Organic fertilizer production process |
| CN103708626A (en) * | 2013-12-25 | 2014-04-09 | 嘉兴学院 | Method for treating solid-waste anaerobic fermentation biogas slurry |
| CN104004793A (en) * | 2014-06-12 | 2014-08-27 | 常州大学 | Power generation technology with biogas produced by mixed fermentation of excrement and straws of distributed swine breeder |
| CN104004792A (en) * | 2014-06-12 | 2014-08-27 | 常州大学 | Distributed swine breeder excrement and straw mixed fermentation resource utilization technology |
| CN104150989A (en) * | 2014-08-18 | 2014-11-19 | 常州市生物技术发展中心 | Method for making compost by using poultry night soil |
| CN105063095A (en) * | 2015-09-08 | 2015-11-18 | 长岭县一鑫农业开发有限公司 | Fermentation method of biomass biogas |
| CN105861367A (en) * | 2016-04-20 | 2016-08-17 | 陆川县丰源农牧有限公司 | Pig manure methane fermenting agent formula and preparation method thereof |
| CN107760725A (en) * | 2017-12-08 | 2018-03-06 | 黑龙江省能源环境研究院 | A kind of yellow storage stalk anaerobic fermentation method |
| CN108059991A (en) * | 2017-08-21 | 2018-05-22 | 重庆大雨水生态科技有限公司 | A kind of New-type fuel and brick, haydite, cement, fiberboard based on heavy metal sewage sludge |
| 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 |
| CN108503399A (en) * | 2018-04-11 | 2018-09-07 | 农业部规划设计研究院 | A kind of efficient processing method for removing antibiotic in feces of livestock and poultry |
| 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 |
| CN109485464A (en) * | 2017-09-09 | 2019-03-19 | 长沙创远环保科技有限公司 | A kind of method that feces of livestock and poultry produces biogas and fertilizer |
| CN109628500A (en) * | 2019-01-17 | 2019-04-16 | 黑龙江新天地能源开发有限公司 | 3H efficient anaerobic fermentation solid organic castoff producing methane technology |
| CN110655423A (en) * | 2019-06-18 | 2020-01-07 | 江西省红壤研究所 | Grape stalk fermentation liquor and preparation method thereof |
| CN110918623A (en) * | 2019-12-28 | 2020-03-27 | 张千河 | Method for treating waste by utilizing microbial fermentation |
| CN113215201A (en) * | 2021-06-09 | 2021-08-06 | 重庆大学 | Coupling process for mixing pig manure with rice straw solid-state biogas fermentation and biogas residue aerobic composting |
| CN114480511A (en) * | 2022-03-03 | 2022-05-13 | 东北农业大学 | Method for preparing methane by utilizing straw anaerobic fermentation |
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Cited By (20)
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| CN103304286A (en) * | 2013-06-24 | 2013-09-18 | 重庆光大(集团)有限公司 | Organic fertilizer production process |
| CN103708626A (en) * | 2013-12-25 | 2014-04-09 | 嘉兴学院 | Method for treating solid-waste anaerobic fermentation biogas slurry |
| CN103708626B (en) * | 2013-12-25 | 2016-01-20 | 嘉兴学院 | The treatment process of a kind of solid-waste anaerobic fermentation natural pond liquid |
| CN104004793A (en) * | 2014-06-12 | 2014-08-27 | 常州大学 | Power generation technology with biogas produced by mixed fermentation of excrement and straws of distributed swine breeder |
| CN104004792A (en) * | 2014-06-12 | 2014-08-27 | 常州大学 | Distributed swine breeder excrement and straw mixed fermentation resource utilization technology |
| CN104150989A (en) * | 2014-08-18 | 2014-11-19 | 常州市生物技术发展中心 | Method for making compost by using poultry night soil |
| CN105063095A (en) * | 2015-09-08 | 2015-11-18 | 长岭县一鑫农业开发有限公司 | Fermentation method of biomass biogas |
| CN105861367A (en) * | 2016-04-20 | 2016-08-17 | 陆川县丰源农牧有限公司 | Pig manure methane fermenting agent formula and preparation method thereof |
| CN108059991A (en) * | 2017-08-21 | 2018-05-22 | 重庆大雨水生态科技有限公司 | A kind of New-type fuel and brick, haydite, cement, fiberboard based on heavy metal sewage sludge |
| CN109485464A (en) * | 2017-09-09 | 2019-03-19 | 长沙创远环保科技有限公司 | A kind of method that feces of livestock and poultry produces biogas and fertilizer |
| CN107760725A (en) * | 2017-12-08 | 2018-03-06 | 黑龙江省能源环境研究院 | A kind of yellow storage stalk anaerobic fermentation method |
| 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 |
| CN108503399A (en) * | 2018-04-11 | 2018-09-07 | 农业部规划设计研究院 | A kind of efficient processing method for removing antibiotic in feces of livestock and poultry |
| 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 |
| CN109628500A (en) * | 2019-01-17 | 2019-04-16 | 黑龙江新天地能源开发有限公司 | 3H efficient anaerobic fermentation solid organic castoff producing methane technology |
| CN110655423A (en) * | 2019-06-18 | 2020-01-07 | 江西省红壤研究所 | Grape stalk fermentation liquor and preparation method thereof |
| CN110918623A (en) * | 2019-12-28 | 2020-03-27 | 张千河 | Method for treating waste by utilizing microbial fermentation |
| CN110918623B (en) * | 2019-12-28 | 2021-08-17 | 张千河 | Method for treating waste by utilizing microbial fermentation |
| CN113215201A (en) * | 2021-06-09 | 2021-08-06 | 重庆大学 | Coupling process for mixing pig manure with rice straw solid-state biogas fermentation and biogas residue aerobic composting |
| CN114480511A (en) * | 2022-03-03 | 2022-05-13 | 东北农业大学 | Method for preparing methane by utilizing straw anaerobic fermentation |
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Application publication date: 20130213 |