CN1219513A - New technology for producing methane by high-concentration fermentation of urban organic garbage - Google Patents
New technology for producing methane by high-concentration fermentation of urban organic garbage Download PDFInfo
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- CN1219513A CN1219513A CN97107814A CN97107814A CN1219513A CN 1219513 A CN1219513 A CN 1219513A CN 97107814 A CN97107814 A CN 97107814A CN 97107814 A CN97107814 A CN 97107814A CN 1219513 A CN1219513 A CN 1219513A
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- 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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- 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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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Abstract
A process for generating marsh gas by high-concentration fermentation of organic city garbage features that the organic city garbage containing solid 30-40% is fermented in aerobic condition at first and then in anaerobic condition. Its advantages include quick start, short period reduced by 15-20 days, no acidic poison, high output (0.3 cu.m/cu.m.d in average and 0.6 cu.m/cu.m.d to maximum), low water content in fermented organic substance, high pathogenic bacteria-killing effect, and no environmental pollution.
Description
The invention belongs to high density organic waste fermentation process.
Handling organic garbage of city with Unareobic fermentation is a kind of effective ways that reclaim the energy in the domestic refuse.In recent years, countries in the world research aspect refuse treatment product biogas technology is more, generally adopt two-step fermentation, extraction to study the municipal wastes producing methane through anaerobic fermentation as American-European countries such as the U.S., Taiwan wet method producing methane through anaerobic fermentation, China also handles municipal wastes with the anaerobic dry fermentation method, the biogas that produces is as fuel, and the organic waste after the fermentation is made compoiste fertilizer.But various places are also lower with the organic total solids level of anaerobic process processing municipal wastes at present, all below 30%, rubbish water content after the processing is processed into organic fertilizer up to more than 70% with it, also need slough a large amount of water, exhaust the more energy, and waste water needs also further to handle.Minority also adopts organic waste anaerobic dry fermentation (total organic solid is about 25%) fermentation methane production technology, but adopts direct anaerobic dry fermentation to exist starting slow, long processing period, and cause oxypathy easily.
Problem at above existence, the purpose of this invention is to provide the fermentation process of handling organic garbage of city, make to handle and contain organic high density organic waste more than 30%, can shorten fermentation period again, improve biogas yield, save energy makes treatment of urban garbage realize innoxious, resource utilization.
The present invention can carry out in the following manner: the organic waste of domestic waste after sorting, advanced person's aerobe fermentation of acting charitably, add zymocyte liquid then and carry out the fermentation of anaerobic methane production gas, solid matter processing organic fertilizer behind the anaerobically fermenting, the waste water that produces is used as next zymocyte liquid, when aerobic fermentation and anaerobically fermenting carry out air blast after finishing and bleed, focus on the waste gas of extraction again.
The present invention with sorting after total organic solid content be that the organic waste of 30-40% is a process object, its organism is mainly perishable dish leaf, melon skin, shell and some useless food.Idiographic flow is:
1. the organic waste after the sorting is added fermentation vat, the limit edged sprays waste water, makes the aerobic fermentation water ratio about 50%;
2. add a cover behind the charged, adopt the alternated blasting aerobic fermentation of ventilating from the bottom, pond,, extract the waste gas that produces in the fermenting process out in the Chi Gai exit simultaneously every air blast in 1 hour 1 hour; And the method that washes with water focuses on the waste gas of extracting out.Waste gas is further handled with biological process after washing again.
3. after aerobic fermentation 3-4 days, add zymocyte liquid, and make the content of total organic solid reach 30-40%, seal and carry out the fermentation of anaerobic methane production gas, fermentation time is generally 15-20 days (southern normal temperature).
4. after anaerobically fermenting finishes, emit waste water at the bottom of the pond, this waste water is promptly as the usefulness of next zymocyte liquid.After having put waste water at the bottom of the pond,, still adopt, bleed from Chi Ding, to remove waste gas from pond pucking wind for guaranteeing discharging safety.(waste gas is further handled discharging after washing with water again), accompanying drawing 1 is seen in technical process.
The fermentation unit synoptic diagram is seen Fig. 2.1. waste gas is extracted out mouthful and methane outlet 2. water sealed tanks 3. pond bodies 4. water, air communication screen 5. skim strainers 6. aerobic ventpipe 7. discharging of waste liquid pipes, 8. liquid storing pools and bacterial classification ponds
The organic concentration of producing methane through anaerobic fermentation of the present invention (Ts) is at 35-40%, and fermentation back organism water content has reduced the energy that composting exhausts because of dehydration than the low 10-15% of water content of at present domestic and international anaerobically fermenting; It is big to have solved direct anaerobic fermentation and acid production amount, starts slowly, and the problem that the cycle is long promptly produces biogas second day of anaerobically fermenting, and factor of created gase on average reaches 0.3m
3/ m
3D is up to 0.6m
3/ m
3D (methane content reaches more than 56%); Owing to adopt earlier aerobic back anaerobically fermenting, in the aerobic fermentation stage, leavening temperature can reach 70C, can improve the fermentation vat temperature, and play killing egg and the effect of the germ of going out, also improved simultaneously the leavening temperature (summer, autumn keep 30-45 ℃, and spring, winter remain on 20 1 25 ℃) in producing methane through anaerobic fermentation stage, guaranteed that fermentation all can move at all seasons.And acid concentration is controlled at optimum level, and improve biogas yield, shorten the processing cycle.In same device, carry out simultaneously, thereby reduced floor space and saved construction investment because of aerobic fermentation and anaerobically fermenting.
The present invention handles the high density organic waste, is not subjected to device volume restriction, treatment scale promptly to can be several cubes, tens sides, can go up 100 sides, hundreds of side ...And there is not the exhaust emission environmental problem.
Embodiment:
Carry out 60m3 fermentation methane production test in the somewhere, total organic solid (Ts) is at 30-40%, whole anaerobically fermenting biogas yield average out to 0.3m
3/ m
3D, methane content is up to 67%.In the aerobic fermentation stage, the temperature of fermenting the 4th day promptly reaches 70 ℃, and after the fermentation ends, induced worm egg death rate reaches 100%, and coliform count drops to 10
-2Through operation more than a year, the anaerobically fermenting temperature is up to 45 ℃ in summer, and winter, spring are 25～30 ℃, and there is not the pollution problem to environment of waste water and waste gas in whole fermentation process.
Claims (3)
1. high density (total solids level is 30-40%) organic garbage of city fermentation methane production new technology, it is characterized in that, the Ts of producing methane through anaerobic fermentation is 30-40%, and whole fermentation process is first aerobic fermentation and back anaerobically fermenting, and carries out air blast and bleed in treating processes.Accompanying drawing 1 is seen in technical process.
2. by the described high density organic garbage of city of claim 1 fermentation methane production new technology, it is characterized in that, the Ts of producing methane through anaerobic fermentation is 30-40%, whole fermentation is to carry out in accompanying drawing 2 devices, during aerobic fermentation and after the anaerobically fermenting end, carry out air blast, extract the waste gas that produces the fermenting process out from Chi Dingbuchi lid exit from the bottom, pond.
3. by the described high density organic garbage of city of claim 2 fermentation methane production new technology, it is characterized in that, the waste gas of extracting out is concentrated and is washed processing, and the waste liquid that produces in the fermenting process is concentrated and is used for adding organic waste next time, with afterfermentation required inoculum and moisture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107814A CN1072616C (en) | 1997-12-11 | 1997-12-11 | New technology for producing methane by high-concentration fermentation of urban organic garbage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107814A CN1072616C (en) | 1997-12-11 | 1997-12-11 | New technology for producing methane by high-concentration fermentation of urban organic garbage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1219513A true CN1219513A (en) | 1999-06-16 |
| CN1072616C CN1072616C (en) | 2001-10-10 |
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ID=5169901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97107814A Expired - Fee Related CN1072616C (en) | 1997-12-11 | 1997-12-11 | New technology for producing methane by high-concentration fermentation of urban organic garbage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1072616C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434527C (en) * | 2005-09-13 | 2008-11-19 | 广东琪田农药化工有限公司 | Method and apparatus for comprehensively utilizing water hyacinth plant residue to produce methane |
| CN102424612A (en) * | 2011-09-08 | 2012-04-25 | 河南省洁苑环保科技有限公司 | Rapid degradation and fertilizer making technology for degradable organic matter in household garbage |
| CN102430557A (en) * | 2011-09-08 | 2012-05-02 | 河南省洁苑环保科技有限公司 | Household waste hydraulic separation technology |
| CN105695322A (en) * | 2016-02-26 | 2016-06-22 | 徐州工程学院 | Garbage fermentation device and fermentation method combining aerobic mode and anaerobic mode |
-
1997
- 1997-12-11 CN CN97107814A patent/CN1072616C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434527C (en) * | 2005-09-13 | 2008-11-19 | 广东琪田农药化工有限公司 | Method and apparatus for comprehensively utilizing water hyacinth plant residue to produce methane |
| CN102424612A (en) * | 2011-09-08 | 2012-04-25 | 河南省洁苑环保科技有限公司 | Rapid degradation and fertilizer making technology for degradable organic matter in household garbage |
| CN102430557A (en) * | 2011-09-08 | 2012-05-02 | 河南省洁苑环保科技有限公司 | Household waste hydraulic separation technology |
| CN105695322A (en) * | 2016-02-26 | 2016-06-22 | 徐州工程学院 | Garbage fermentation device and fermentation method combining aerobic mode and anaerobic mode |
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| Publication number | Publication date |
|---|---|
| CN1072616C (en) | 2001-10-10 |
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Granted publication date: 20011010 Termination date: 20131211 |