CN1403396A - Periodical stimulation and solid fermentation process of producing marsh gas with straw and city refuse - Google Patents
Periodical stimulation and solid fermentation process of producing marsh gas with straw and city refuse Download PDFInfo
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- CN1403396A CN1403396A CN01130972A CN01130972A CN1403396A CN 1403396 A CN1403396 A CN 1403396A CN 01130972 A CN01130972 A CN 01130972A CN 01130972 A CN01130972 A CN 01130972A CN 1403396 A CN1403396 A CN 1403396A
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- biogas
- fermentation
- solid state
- solid
- state fermentation
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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 present invention relates to biological marsh gas fermentation, and is especially the periodical stimulation and solid marsh gas fermentation process of straw and city refuse. The said process includes steam blasting dry straw and organic refuse; fast mixing of the steam blasted material and marsh gas and solid fermentation in a sealed fermenting tank; introducing fermented marsh gas to eliminate air from the tank and applying pressure periodically to reinforce solid fermentation; and collecting marsh gas. The said process has raised fermentation temperature and humidity, high marsh gas yield and easy to use fermented residue.
Description
Technical field
The invention belongs to and utilize biomass to carry out the biogas fermentation field, specially refer to the method that period stimulating stalk and municipal wastes carry out solid state fermentation biogas.
Background technology
At present mostly biogas fermentation is that based on the wet fermentation of biogas, the decomposition utilization of agricultural crop straw in the wet fermentation of traditional biogas is very low, and unemployed stalk is converted into fertilizer or the feed treatment process loaded down with trivial details, the cost height.
The wet fermentation of biogas is the marsh gas fermentation process of a large amount of free water of a kind of needs, in the existing bionethanation system, the wet zymotechnique of biogas is used very extensively, but shortcoming is to contain a large amount of moisture, when cleaning fermentation surplus materials, have to carry out comparatively complicated artificial work, same, when adding materials, also there is this problem on the one hand, volume is big, and the material treatment capacity is little.What is more important in field also, to utilize resistates to produce aspect such as fungi more inconvenient, material must be applied in feed, fertilizer and the production application after handling again.
China's domestic waste annual production at present reaches more than 100,000,000 ton, and annual speed increment with 8%-10%, wherein 50% above composition is an organism, mainly be to adopt sanitary landfill method to handle (spontaneous fermentation), there is: percolate and landfill gas that (1) produces cause grave danger to environment; (2) long processing period, the production cost height.
The biogas solid state fermentation has made full use of solid refuse and these dried big characteristics of stalk, makes the substrate that has not fermented can make things convenient for usefulness such as fertilizer sources and feed; Simultaneously on also field and volume thereof, addition, all have the wet incomparable advantage of fermenting of biogas in the transportation.From these aspects, the biogas solid state fermentation has a extensive future.But urgent at present the reinforcement needs the research of solid state fermentation biogas technology through engineering approaches, improves solid state fermentation biogas technology level and practicality.
Summary of the invention
The objective of the invention is to set about research, propose the method that a kind of period stimulating steam puffed stalk and municipal wastes carry out solid state fermentation biogas from solid material pre-treatment and two aspects of period stimulating solid state fermentation biogas.The one, use solid state fermentation biogas and solve the wet not tractable problem of fermentation residue, the 2nd, by solid material pre-treatment and extraneous period stimulating improve solid state fermentation biogas raw material availability and factor of created gase low.
Technical scheme of the present invention is:
At first put into the solid state fermentation tank body after the quick-fried processing of organic waste process vapour with air-dry stalk or screening; Then gas-explosive material is mixed rapidly with biogas, be sealed in the fermentation tank body and carry out solid state fermentation; Feed the air in the biogas emptying tank body that ferments, adopt the speed of extraneous cycle pressure variation with strengthening solid state fermentation; Rapid exhaust gas collection biogas.
The quick-fried processing of described vapour is meant earlier that the stalk rough lumber is long to 20-30mm, reinstalls steam-explosion jar, presses 10min in the 1.3-1.7Mpa dimension, or the organic waste of screening tie up under 1.0-1.3Mpa and press 5-10min, and instant decompression release promptly gets gas-explosive material.
Described gas-explosive material mixes rapidly with biogas and is meant in gas-explosive material, the volatile salt that adds the methane-sludge account for gas-explosive material weight 8-10wt% and 0.1-0.8wt% is as solid-state fermentation culture medium, add water, the water content that makes the solid state fermentation fermention medium is 30-60wt%.
Described solid state fermentation is at 50 ℃ of bottom fermentation 5-15 days.
Described stalk is meant plant materials such as wheat straw, straw or cornstalk.
The organic waste of described screening is meant the domestic refuse after the go-on-go of city.
The extraneous cycle pressure of described employing is meant under 50 ℃ of constant temperature culture, along with the generation of biogas, progressively boosts, and every 12-24 hour one-period makes the pressure in the fermentation tank body reach 0.1-0.2Mpa with external source biogas, exhaust rapidly behind the dimension pressure 5-10min.
Described rapid exhaust gas collection is meant by the solenoid control that is connected on the solid-state fermenter rushes down pressure fast, collects biogas by blind enema.
The present invention requires to accomplish that as far as possible the pressurising time is longer that curve rises mild.Rush down and press time requirement short as far as possible, generally within several seconds, finish, make the gas between the solid medium particle expansion suddenly take place and the bed of material is taken place loosening.The pressure cycle of solid-state fermenter changes, to solid medium is static, but to gas phase is dynamic, and its advantage shows as like this: (1) is easy to make the molecular diffusion of gas phase in the solid-state fermenter to become the forced convection diffusion, with reach temperature in the solid-state fermenter, humidity evenly.(2) in rushing down press operation, because of exhaust fast suddenly, intergranular gas phase plays loosening effect because of puffing to solid particulate.This is to the peculiar profit of microorganism growth.(3) pressure cycle fluctuation hormesis that microbial metabolism is had.
Advantage of the present invention has: (1) is beneficial to the degraded of microorganism because used stalk through the quick-fried processing of vapour, has destroyed natural structure, has improved the straw utilization rate.(2) solid refuse can be sterilized after the quick-fried processing of vapour effectively, is convenient to operation utilization.(3) the gas phase cyclic swing improves solid state fermentation temperature of charge, humidity uniformity in the solid-state fermenter, has saved whipping appts.(4) solid state fermentation biogas when improving yield of methane, also is convenient to the utilization of fermentation residue.
Embodiment
Embodiment 1
The wheat straw rough lumber is long to about 25mm, in the steam-explosion jar of packing into, be raised to 1.5Mpa, dimension is pressed 10min, opens baiting valve, and instant decompression discharges and promptly gets the wheat straw of the quick-fried processing of vapour.Add the methane-sludge of the wheat straw 10wt% account for the quick-fried processing of vapour and 0.5wt% volatile salt as solid-state fermentation culture medium, methane-sludge and volatile salt be sealed in the fermentation tank body after gas-explosive material mixes, and interpolation water, the water content that makes the solid state fermentation fermention medium is 30wt%; Begin to feed the biogas emptying tank body air of fermentation; Under 50 ℃ of constant temperature culture, along with the generation of biogas, progressively boost, every 12-24 hour one-period makes the pressure in the fermentation tank body reach 0.1-0.2Mpa with external source biogas, after dimension is pressed 5-10min, by the rapid exhaust gas collection biogas of solenoid control.Through fermentation in 8-15 days, the weightless 50-60wt% of material, fermentation residue can be directly as organic fertilizer.Wherein Mierocrystalline cellulose, hemicellulose and xylogen rate of decomposition are reached for 60wt%, 90wt% respectively and more than the 20wt%.
Embodiment 2
Domestic refuse through screening in the steam-explosion jar of packing into, is raised to 1.0Mpa, and dimension is pressed 10min, opens baiting valve, and instant decompression discharges and promptly gets the domestic refuse of the quick-fried processing of vapour.Add the methane-sludge of the domestic refuse 8wt% account for the quick-fried processing of vapour and 0.2wt% volatile salt as solid-state fermentation culture medium, methane-sludge and volatile salt be sealed in the fermentation tank body after gas-explosive material mixes, and interpolation water, the water content that makes the solid state fermentation fermention medium is 60wt%; Begin to feed the biogas emptying tank body air of fermentation; Under 50 ℃ of constant temperature culture, along with the generation of biogas, progressively boost, every 12-24 hour one-period makes the pressure in the fermentation tank body reach 0.1-0.2Mpa with external source biogas, after dimension is pressed 5-10min, by the rapid exhaust gas collection biogas of solenoid control.Through fermentation in 5-10 days, the weightless 50wt% of material, fermentation residue can be directly as organic fertilizer.
Claims (8)
1. period stimulating stalk and municipal wastes carry out the method for solid state fermentation biogas, it is characterized in that: this method is that organic waste with air-dry stalk or screening is put into the solid state fermentation tank body after through the quick-fried processing of vapour; Then gas-explosive material is mixed rapidly with biogas, be sealed in the fermentation tank body and carry out solid state fermentation; Feed the air in the biogas emptying tank body that ferments, adopt the speed of extraneous cycle pressure variation with strengthening solid state fermentation; Rapid exhaust gas collection biogas.
2. the method for claim 1, it is characterized in that: the quick-fried processing of described vapour is meant earlier that stalk rough lumber an aromatic plant metioned in ancient books 20-30mm is long, reinstalls steam-explosion jar, presses 10min in the 1.3-1.7Mpa dimension, or the organic waste of screening tie up under 1.0-1.3Mpa and presses 5-10min, and instant decompression release promptly gets gas-explosive material.
3. the method for claim 1, it is characterized in that: described gas-explosive material mixes rapidly with biogas and is meant in gas-explosive material, the volatile salt that adds the methane-sludge account for gas-explosive material weight 8-10wt% and 0.1-0.8wt% is as solid-state fermentation culture medium, add water, the water content that makes the solid state fermentation fermention medium is 30-60wt%.
4. the method for claim 1, it is characterized in that: described solid state fermentation is at 50 ℃ of bottom fermentation 5-15 days.
5. as claim 1,2 or 3 any described methods, it is characterized in that: described stalk is meant wheat straw, straw or cornstalk.
6. as claim 1 or 2 any described methods, it is characterized in that: the organic waste of described screening is meant the domestic refuse after the go-on-go of city.
7. the method for claim 1, it is characterized in that: the extraneous cycle pressure of described employing is meant under 50 ℃ of constant temperature culture, generation along with biogas, progressively boost, every 12-24 hour one-period makes the pressure in the fermentation tank body reach 0.1-0.2Mpa with external source biogas, exhaust rapidly behind the dimension pressure 5-10min.
8. as claim 1 or 7 any described methods, it is characterized in that: described rapid exhaust gas collection is meant by the solenoid control that is connected on the solid-state fermenter rushes down pressure fast, collects biogas by blind enema.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011309725A CN1169633C (en) | 2001-08-28 | 2001-08-28 | Periodical stimulation and solid fermentation process of producing marsh gas with straw and city refuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011309725A CN1169633C (en) | 2001-08-28 | 2001-08-28 | Periodical stimulation and solid fermentation process of producing marsh gas with straw and city refuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1403396A true CN1403396A (en) | 2003-03-19 |
| CN1169633C CN1169633C (en) | 2004-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011309725A Expired - Fee Related CN1169633C (en) | 2001-08-28 | 2001-08-28 | Periodical stimulation and solid fermentation process of producing marsh gas with straw and city refuse |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851125A (en) * | 2009-03-30 | 2010-10-06 | 杨春和 | Agricultural waste-composting treatment method |
| CN102168109A (en) * | 2011-02-01 | 2011-08-31 | 中国科学院过程工程研究所 | Method for producing hydrogen and methane through continuous solid state fermentation of kitchen garbage |
| CN102174595A (en) * | 2011-02-01 | 2011-09-07 | 中国科学院过程工程研究所 | Method for producing butanol by continuous solid state fermentation of restaurant-kitchen garbage |
| CN102219605A (en) * | 2011-04-29 | 2011-10-19 | 强光初 | Plant culture medium |
| CN103272829A (en) * | 2013-06-03 | 2013-09-04 | 邓锦新 | Urban living garbage treatment method |
-
2001
- 2001-08-28 CN CNB011309725A patent/CN1169633C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851125A (en) * | 2009-03-30 | 2010-10-06 | 杨春和 | Agricultural waste-composting treatment method |
| CN102168109A (en) * | 2011-02-01 | 2011-08-31 | 中国科学院过程工程研究所 | Method for producing hydrogen and methane through continuous solid state fermentation of kitchen garbage |
| CN102174595A (en) * | 2011-02-01 | 2011-09-07 | 中国科学院过程工程研究所 | Method for producing butanol by continuous solid state fermentation of restaurant-kitchen garbage |
| CN102219605A (en) * | 2011-04-29 | 2011-10-19 | 强光初 | Plant culture medium |
| CN103272829A (en) * | 2013-06-03 | 2013-09-04 | 邓锦新 | Urban living garbage treatment method |
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| Publication number | Publication date |
|---|---|
| CN1169633C (en) | 2004-10-06 |
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Granted publication date: 20041006 Termination date: 20130828 |