CN103820502A - Two-phase anaerobic fermentation method for biogas production - Google Patents
Two-phase anaerobic fermentation method for biogas production Download PDFInfo
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- CN103820502A CN103820502A CN201410077904.4A CN201410077904A CN103820502A CN 103820502 A CN103820502 A CN 103820502A CN 201410077904 A CN201410077904 A CN 201410077904A CN 103820502 A CN103820502 A CN 103820502A
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- anaerobic fermentation
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- diphasic anaerobic
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- fermentation biogas
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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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Abstract
The invention discloses a two-phase anaerobic fermentation method for biogas production, which adopts straw and kitchen waste as raw materials. According to the method provided by the invention, the straw and the kitchen waste are mixed in a proper ratio, and inhibition generated by single material is removed, so that two-phase common fermentation is prompted; by arranging a filler in gas-phase production and adjusting the hydraulic retention time in the gas-phase production, the gas yield is greatly increased, and the phase separation effect is greatly improved. The method solves the problems about floating sludge, encrusting and large biogas liquid discharge capacity of a single-phase anaerobic fermentation reactor, greatly improves the hydrolytic acidification efficiency and gas production efficiency of the materials, is particularly suitable for the present situations of wide rural area and dispersed straw production areas, and has a good application prospect.
Description
Technical field
The present invention relates to a kind ofly take stalk and changing food waste as the diphasic anaerobic fermentation biogas method of raw material, belong to environmental engineering and energy technology field.
Background technology
In recent years, along with growth in the living standard, the quickening of Integration of Urban-rural Areas process, the commercial energy resources such as electric energy, fossil energy become the main use energy of Rural areas, have caused a large amount of agricultural crop straws to discard in field and have been committed to the flames.Crop straw burning harm is huge, for example: (1) stalk can produce the material of the harm body health of people such as a large amount of oxynitride, sulfurous gas and pellet through incomplete combustion; (2) so easy initiation fire of burning that does not add any measure, threatens life property safety of people; (3) crop straw burning produces a large amount of smog, and visibility meter is reduced greatly, and severe jamming communications and transportation, affects traffic safety; (4) cause energy use efficiency low, waste resource.Stalk is carried out to producing methane through anaerobic fermentation; can solve Rural areas problem of environmental pollution on the one hand, also can produce on the other hand clean energy biogas, both meet the needs of environment protection; the wasting of resources be can avoid again, environmental protection, the energy, resource reutilization comprehensive benefit realized.Changing food waste and stalk are all to have higher production potential, and are all unmanageable rural organic wastes, and single straw anaerobic processes that fermentation period is long and C/N is higher, and single changing food waste anaerobically fermenting is unstable and acidifying very easily occurs suppress.
At present, stalk anaerobic fermentation produces marsh gas reactor and mainly contains homogenous anaerobic fermentation reactor and diphasic anaerobic fermentation reactor.Homogenous anaerobic fermentation reactor is that biogas fermentation material is put in a device, is that product acid and the product methane phase of biogas fermentation unites two into one, and in same device, has regulated voluntarily.Homogenous anaerobic fermentation reactor is simple in structure, and initial cost is lower, not high to personnel and equipment requirements, but gas producing efficiency is lower.
Diphasic anaerobic fermentation reactor be two independently fermentation unit produce acid phase and aerogenesis stage, for acid-producing bacteria and methanogen provide required separately top condition, avoid between homogenous anaerobic zymotechnique microorganism and the restraining effect of environment to microorganism, diphasic anaerobic fermentation reactor more can be given full play to microbic activity than homogenous anaerobic fermentation reactor, improve treatment effect, but technical construction operation is complicated, investment is also high a lot of than homogenous anaerobic anaerobic fermentation reactor, also higher to the requirement of personnel and equipment.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of diphasic anaerobic fermentation biogas method take stalk and changing food waste as raw material, method of the present invention is by mixing with changing food waste stalk with suitable proportioning, remove the inhibition that single material produces, thereby jointly promote two-phase fermentation.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of diphasic anaerobic fermentation biogas method, comprises the steps:
Step 1, mixes amount of dry matter and is placed on completely in hydrolysis acidification device than the stalk that is 3:1 with changing food waste;
Step 2, sprays fermented liquid on the mixture of step 1, and mixture, under the effect of fermented liquid, is converted into organic acid;
Step 3, the organic acid of step 2 stripping is along with circulation fluid flows in ferment ation gas producing device, and organic acid produces biogas under the effect of methanogen; Wherein, circulating fluid flow rate is 416.7gTS/Ld with the amount of dry matter ratio of mixture;
Step 4, after step 3 reaction, remaining organic acid is along with circulation fluid returns in hydrolysis acidification device.
As preferably, in step 1, the refulling cycle of described mixture is 28-31 days.
As preferably, in step 1, described stalk particle diameter is 5mm.
As preferably, in step 2, in described fermented liquid, contain cellulose-decomposing bacterium and proteolysis bacterium.
As preferably, in step 3, the residence time of described organic acid in ferment ation gas producing device is 0.5 ~ 2.5d.
As preferably, in step 3, the temperature of described ferment ation gas producing device is 35 ℃.
As preferably, in step 3, in described ferment ation gas producing device, be filled with knot wire filler, wherein, and meter by volume, the packing fraction of described knot wire filler is 20%.
Beneficial effect: diphasic anaerobic fermentation biogas method of the present invention is mixed with stalk changing food waste by suitable proportioning after, the material gas production rate of unit mass increases greatly, also shortened the hydrolysis of stalk and produced the acid cycle simultaneously, and then acidication efficiency and the gas producing efficiency of material are greatly improved, reactor scum silica frost, crust and the large problem of natural pond liquid quantity discharged that homogenous anaerobic occurs are solved, the inventive method is particularly suitable for the situation that rural areas area is wide, stalk generation area disperses, and has good application prospect.
Accompanying drawing explanation
Fig. 1 utilizes the present invention to produce the structural representation of biogas method system.
Embodiment
The invention provides a kind of diphasic anaerobic fermentation biogas method take stalk and changing food waste as raw material, below in conjunction with the drawings and specific embodiments, the invention will be further described.
Present method adopts batch charging, substrate is placed in to hydrolysis acidification device 14, fermented liquid sprays from top to bottom on substrate, organic matter in substrate produces organic dissolution fluid under hydrolysis flora and acid-producing bacteria group's effect, and (this organic matter dissolution fluid is acetic acid, the organic acid such as propionic acid or butyric acid), produced simultaneously gas is overflowed through air outlet 15, organic dissolution fluid is after perforated retainer 11 filters, along with being raised pump 12, circulation fluid pumps in ferment ation gas producing device 13, after the hydraulic detention time of adjusting ferment ation gas producing device 13 is 1.5d, within this time, heating rod in ferment ation gas producing device 13, thermopair, controller, the temperature of ferment ation gas producing device 13 is controlled at 35 ℃ by outer wall thermal insulation layer, organic dissolution fluid is converted into by methanogen the biogas that main component is methane in ferment ation gas producing device 13, biogas is overflowed from air outlet 3, after reaction, remaining organic dissolution fluid returns in hydrolysis acidification device 14 through effluent weir 6, carries out organic stripping for the second time, moves in circles.
In above-mentioned embodiment, substrate is for mixing stalk and changing food waste completely, stalk is crushed to 5mm through pulverizer, mix completely with changing food waste is disposable, in amount of dry matter, when the optimum quality ratio of stalk and changing food waste is 3:1, acidizing effect is better, the organic stripping quantity of unit mass (substrate) is 77.6 mg/gTS, and the gas production rate of unit mass is 183.8ml/g; Be 416.7gTS/Ld by hydrolysis acidification device 14 suction to the circulating fluid flow rate of ferment ation gas producing device 13 with substrate amount of dry matter ratio; The hydraulic detention time of ferment ation gas producing device 13 is that the aerogenesis effect of 1.5 days is better, and the gas production rate of unit mass is 183.8ml/g; The substrate refulling cycle in hydrolysis acidification device 14 is 28-31 days; In ferment ation gas producing device 13, be filled with knot wire filler 7, wherein, meter by volume, the packing fraction of described knot wire filler 7 is 20%.
Adopt the system of this product biogas method can realize stable aerogenesis, gas producing efficiency is high, be separated effective, and scum silica frost in service produces less, generation crust and a large amount of scum silica frost phenomenon and natural pond liquid energy recycle.
Above-mentioned embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not limited by the examples; other are any does not deviate from change, the modification done under spirit of the present invention and principle, substitute, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (7)
1. a diphasic anaerobic fermentation biogas method, is characterized in that: comprise the steps:
Step 1, mixes amount of dry matter and is placed on completely in hydrolysis acidification device than the stalk that is 3:1 with changing food waste;
Step 2, sprays fermented liquid on the mixture of step 1, and mixture, under the effect of fermented liquid, is converted into organic acid;
Step 3, the organic acid of step 2 stripping is along with circulation fluid flows in ferment ation gas producing device, and organic acid produces biogas under the effect of methanogen; Wherein, circulating fluid flow rate is 416.7gTS/Ld with the amount of dry matter ratio of mixture;
Step 4, after step 3 reaction, remaining organic acid is along with circulation fluid returns in hydrolysis acidification device.
2. diphasic anaerobic fermentation biogas method according to claim 1, is characterized in that: in step 1, the refulling cycle of described mixture is 28-31 days.
3. diphasic anaerobic fermentation biogas method according to claim 1, is characterized in that: in step 1, described stalk particle diameter is 5mm.
4. diphasic anaerobic fermentation biogas method according to claim 1, is characterized in that: in step 2, contain cellulose-decomposing bacterium and proteolysis bacterium in described fermented liquid.
5. diphasic anaerobic fermentation biogas method according to claim 1, is characterized in that: in step 3, the residence time of described organic acid in ferment ation gas producing device is 0.5 ~ 2.5d.
6. diphasic anaerobic fermentation biogas method according to claim 1, is characterized in that: in step 3, the temperature of described ferment ation gas producing device is 35 ℃.
7. diphasic anaerobic fermentation biogas method according to claim 1, is characterized in that: in step 3, in described ferment ation gas producing device, be filled with knot wire filler, wherein, and meter by volume, the packing fraction of described knot wire filler is 20%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886396A (en) * | 2016-04-15 | 2016-08-24 | 东南大学 | Two-phase straw anaerobic fermentation device and fermentation method utilizing same |
| CN106854664A (en) * | 2017-03-06 | 2017-06-16 | 东南大学 | A kind of utilization two-phase mixtures anaerobic digestion solution is molten to drench the method that abandoned biomass produces biogas |
| CN111118066A (en) * | 2020-01-22 | 2020-05-08 | 广东省石油与精细化工研究院 | Method for producing biogas through biochar solid acid reinforced two-phase anaerobic fermentation |
| CN112501215A (en) * | 2020-12-23 | 2021-03-16 | 深圳茂元环保科技有限公司 | Biogas preparation method for kitchen waste treatment |
| CN112501214A (en) * | 2020-11-24 | 2021-03-16 | 北京建筑大学 | Two-phase anaerobic treatment system and method for reinforcing wet garbage in villages and towns |
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| CN101805753A (en) * | 2010-02-03 | 2010-08-18 | 中国科学院广州能源研究所 | Method of producing biogas through high-solid two-phase three-stage anaerobic digestion by using perishable organic wastes |
| CN101812401A (en) * | 2010-02-03 | 2010-08-25 | 中国科学院广州能源研究所 | Device for producing biogas by two-phase three-section anaerobic digestion of high solids of perishable organic wastes |
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2014
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| CN101805753A (en) * | 2010-02-03 | 2010-08-18 | 中国科学院广州能源研究所 | Method of producing biogas through high-solid two-phase three-stage anaerobic digestion by using perishable organic wastes |
| CN101812401A (en) * | 2010-02-03 | 2010-08-25 | 中国科学院广州能源研究所 | Device for producing biogas by two-phase three-section anaerobic digestion of high solids of perishable organic wastes |
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| 徐鑫等: "以秸秆和厨余垃圾为原料发酵产甲烷工艺的优化", 《可再生能源》, vol. 28, no. 06, 31 October 2010 (2010-10-31) * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886396A (en) * | 2016-04-15 | 2016-08-24 | 东南大学 | Two-phase straw anaerobic fermentation device and fermentation method utilizing same |
| CN106854664A (en) * | 2017-03-06 | 2017-06-16 | 东南大学 | A kind of utilization two-phase mixtures anaerobic digestion solution is molten to drench the method that abandoned biomass produces biogas |
| CN111118066A (en) * | 2020-01-22 | 2020-05-08 | 广东省石油与精细化工研究院 | Method for producing biogas through biochar solid acid reinforced two-phase anaerobic fermentation |
| CN111118066B (en) * | 2020-01-22 | 2022-05-24 | 广东省石油与精细化工研究院 | Method for producing biogas through biochar solid acid reinforced two-phase anaerobic fermentation |
| CN112501214A (en) * | 2020-11-24 | 2021-03-16 | 北京建筑大学 | Two-phase anaerobic treatment system and method for reinforcing wet garbage in villages and towns |
| CN112501215A (en) * | 2020-12-23 | 2021-03-16 | 深圳茂元环保科技有限公司 | Biogas preparation method for kitchen waste treatment |
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