CN103820502B - A kind of diphasic anaerobic fermentation biogas method - Google Patents
A kind of diphasic anaerobic fermentation biogas method Download PDFInfo
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- CN103820502B CN103820502B CN201410077904.4A CN201410077904A CN103820502B CN 103820502 B CN103820502 B CN 103820502B CN 201410077904 A CN201410077904 A CN 201410077904A CN 103820502 B CN103820502 B CN 103820502B
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- anaerobic fermentation
- stalk
- diphasic anaerobic
- organic acid
- gas producing
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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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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of with stalk and changing food waste the diphasic anaerobic fermentation biogas method as raw material, the method of the present invention by mixing stalk with changing food waste with suitable proportioning, release the suppression that single material produces, thus promote two-phase co-fermentation, the present invention by arrange in aerogenesis phase filler and regulation aerogenesis phase in hydraulic detention time, and then substantially increase gas production and be separated effect.The method of the present invention is while solving reactor scum silica frost, crust and the biogas slurry discharge capacity that homogenous anaerobic occurs big problem, also substantially increase hydrolysis acidification efficiency and the gas producing efficiency of material, the inventive method is particularly suitable for that rural areas area is wide, stalk produces regional scattered present situation, has preferable application prospect.
Description
Technical field
The present invention relates to a kind of with stalk and changing food waste the diphasic anaerobic fermentation biogas method as raw material, belong to environmental project and energy technology field.
Background technology
In recent years, with growth in the living standard, the quickening of Integration of Urban-rural Areas process, the commercial energy such as electric energy, fossil energy becomes the main use energy of rural area, causes substantial amounts of agricultural crop straw and discards and committed to the flames in field.Crop straw burning harm is huge, such as: (1) stalk can produce the material of the harm body health of people such as a large amount of nitrogen oxides, sulfur dioxide and pellet through imperfect combustion；(2) it is so not added with the easy initiation fire of burning of any measure, threaten life property safety of people；(3) crop straw burning produces a large amount of smog, makes visibility be substantially reduced, and severe jamming communications and transportation affects traffic safety；(4) cause energy use efficiency low, waste resource.Stalk is carried out producing methane through anaerobic fermentation; on the one hand can solve rural area problem of environmental pollution, on the other hand also can produce clean energy resource biogas, both meet the needs of environmental protection; the wasting of resources can be avoided again, it is achieved environmental protection, the energy, resource reutilization comprehensive benefit.Changing food waste and stalk are all to have higher production potential, and are all intractable rural organic wastes, and single straw anaerobic processes fermentation period length and C/N is higher, and single anaerobic fermentation of kitchen waste is unstable and acidifying suppression easily occurs.
At present, stalk anaerobic fermentation produces marsh gas reactor mainly homogenous anaerobic fermentation reactor and diphasic anaerobic fermentation reactor.Homogenous anaerobic fermentation reactor is to put into biogas fermentation material in one device, is that product acid and the methane phase stage of biogas fermentation unites two into one, and regulation completes voluntarily in the same apparatus.Homogenous anaerobic fermentation reactor simple in construction, capital expenditure is relatively low, not high to personnel and equipment requirement, but gas producing efficiency is relatively low.
Diphasic anaerobic fermentation reactor is to carry out producing acid phase and aerogenesis stage at two independent installation for fermentings, it is the optimum condition needed for acid-producing bacteria and methanogen offer each, avoid between homogenous anaerobic zymotechnique microorganism and the inhibitory action to microorganism for the environment, diphasic anaerobic fermentation reactor more can give full play to the activity of microorganism than homogenous anaerobic fermentation reactor, improve treatment effect, but technical construction runs complexity, investing also much higher than homogenous anaerobic anaerobic fermentation reactor, the requirement to personnel and equipment is also higher.
Content of the invention
The technical problem to be solved be to provide a kind of with stalk and changing food waste the diphasic anaerobic fermentation biogas method as raw material, the method of the present invention by mixing stalk with changing food waste with suitable proportioning, release the suppression that single material produces, thus collectively promote two-phase fermentation.
In order to solve above-mentioned technical problem, the technical solution adopted in the present invention is:
A kind of diphasic anaerobic fermentation biogas method, comprises the steps:
Amount of dry matter is mixed with changing food waste than the stalk for 3:1 and is placed on completely in hydrolysis acidification device by step 1；
Step 2, sprays zymotic fluid on the mixed material of step 1, and mixed material, under the effect of zymotic fluid, is converted into organic acid；
Step 3, the organic acid of step 2 dissolution flows in ferment ation gas producing device with circulation fluid, and organic acid produces biogas under the effect of methanogen；Wherein, the amount of dry matter of circulating fluid flow rate and mixed material is than for 416.7gTS/L d；
Step 4, after step 3 reaction, remaining organic acid is in circulation fluid return hydrolysis acidification device.
As preferably, in step 1, the refulling cycle of described mixed material is 28-31 days.
As preferably, in step 1, described stalk particle diameter is 5mm.
As preferably, in step 2, described zymotic fluid contains cellulose-decomposing bacterium and proteolysis bacterium.
As preferably, in step 3, the time of staying in ferment ation gas producing device for the described organic acid is 0.5 ~ 2.5d.
As preferably, in step 3, the temperature of described ferment ation gas producing device is 35 DEG C.
As preferably, in step 3, being filled with knot wire filler, wherein, count by volume in described ferment ation gas producing device, the pack completeness of described knot wire filler is 20%.
Beneficial effect: after changing food waste is mixed by suitable proportioning by the diphasic anaerobic fermentation biogas method of the present invention with stalk, the material gas production of unit mass increases significantly, the acid cycle is produced in the hydrolysis simultaneously also shortening stalk, and then substantially increase hydrolysis acidification efficiency and the gas producing efficiency of material, solve the big problem of reactor scum silica frost, crust and the biogas slurry discharge capacity that homogenous anaerobic occurs, the inventive method is particularly suitable for that rural areas area is wide, stalk produces regional scattered situation, has preferable application prospect.
Brief description
Fig. 1 is the structural representation utilizing the present invention to produce biogas method system.
Detailed description of the invention
The present invention provide a kind of with stalk and changing food waste the diphasic anaerobic fermentation biogas method as raw material, the invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.
nullThis method uses batch charging，Substrate is placed in hydrolysis acidification device 14，Zymotic fluid sprays from top to bottom on substrate，Organic matter in substrate produces organic dissolution fluid under the effect of hydrolysis flora and acid-producing bacteria group, and (this organic matter dissolution fluid is acetic acid、The organic acid such as propionic acid or butyric acid)，The gas simultaneously producing escapes through gas outlet 15，Organic dissolution fluid is after perforated retainer 11 filtration，As the elevated pump of circulation fluid 12 pumps in ferment ation gas producing device 13，After the hydraulic detention time of regulation ferment ation gas producing device 13 is 1.5d，Within this time，Heating rod in ferment ation gas producing device 13、Thermocouple、Controller、Outer wall heat-insulation layer controls the temperature of ferment ation gas producing device 13 at 35 DEG C，Organic dissolution fluid is converted into the biogas being mainly composed of methane in ferment ation gas producing device 13 by methanogen，Biogas escapes from gas outlet 3；After reaction, remaining organic dissolution fluid returns in hydrolysis acidification device 14 through effluent weir 6, carries out the organic dissolution of second time, moves in circles.
In above-mentioned embodiment, substrate is for mixing stalk and changing food waste completely, the size-reduced machine of stalk is crushed to 5mm, it is disposably thoroughly mixed with changing food waste, with dry gauge, when stalk is 3:1 with the optimum quality ratio of changing food waste, acidizing effect is preferable, the organic stripping quantity of unit mass (substrate) is 77.6 mg/gTS, and the gas production of unit mass is 183.8ml/g；It is 416.7gTS/L d by the circulating fluid flow rate of hydrolysis acidification device 14 suction to 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 preferable, and the gas production of unit mass is 183.8ml/g；The substrate refulling cycle in hydrolysis acidification device 14 is 28-31 days；Being filled with knot wire filler 7 in ferment ation gas producing device 13, wherein, counting by volume, the pack completeness of described knot wire filler 7 is 20%.
The system using this product biogas method is capable of stable aerogenesis, and gas producing efficiency is high, and the effect that is separated is good, and in operation, scum silica frost generation is less, do not occur crust and a large amount of scum silica frost phenomenon and biogas slurry to recycle.
Above-mentioned embodiment is the present invention preferably embodiment; but embodiments of the present invention are simultaneously not restricted by the embodiments; the change made under other any Spirit Essences without departing from the present invention and principle, modifications, replacement, combination, simplification; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (5)
1. a diphasic anaerobic fermentation biogas method, it is characterised in that: comprise the steps:
Amount of dry matter is mixed with changing food waste than the stalk for 3:1 and is placed on hydrolysis acidification completely by step 1
In device；Wherein, described stalk particle diameter is 5mm；
Step 2, by zymotic fluid spray on the mixed material of step 1, mixed material under the effect of zymotic fluid,
It is converted into organic acid；
Step 3, the organic acid of step 2 dissolution flows in ferment ation gas producing device with circulation fluid, and organic acid is producing
Producing biogas under the effect of methane backeria, the time of staying in ferment ation gas producing device for the described organic acid is
0.5～2.5d；Wherein, the amount of dry matter of circulating fluid flow rate and mixed material is than for 416.7gTS/L d；
Step 4, after step 3 reaction, remaining organic acid is in circulation fluid return hydrolysis acidification device.
2. diphasic anaerobic fermentation biogas method according to claim 1, it is characterised in that: step 1
In, the refulling cycle of described mixed material is 28-31 days.
3. diphasic anaerobic fermentation biogas method according to claim 1, it is characterised in that: step 2
In, described zymotic fluid contains cellulose-decomposing bacterium and proteolysis bacterium.
4. diphasic anaerobic fermentation biogas method according to claim 1, it is characterised in that: step 3
In, the temperature of described ferment ation gas producing device is 35 DEG C.
5. diphasic anaerobic fermentation biogas method according to claim 1, it is characterised in that: step 3
In, it is filled with knot wire filler in described ferment ation gas producing device, wherein, count by volume, described knot wire filler
Pack completeness be 20%.
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| CN201410077904.4A CN103820502B (en) | 2014-03-05 | 2014-03-05 | A kind of diphasic anaerobic fermentation biogas method |
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| CN103820502B true CN103820502B (en) | 2016-11-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN112501214B (en) * | 2020-11-24 | 2022-05-17 | 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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| CN101812401B (en) * | 2010-02-03 | 2012-10-10 | 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 |
| CN101805753B (en) * | 2010-02-03 | 2012-09-05 | 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 |
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