CN1431159A - Technique of two steps of anaerobic digestion for handling city garbage - Google Patents
Technique of two steps of anaerobic digestion for handling city garbage Download PDFInfo
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- CN1431159A CN1431159A CN03118038A CN03118038A CN1431159A CN 1431159 A CN1431159 A CN 1431159A CN 03118038 A CN03118038 A CN 03118038A CN 03118038 A CN03118038 A CN 03118038A CN 1431159 A CN1431159 A CN 1431159A
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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
A two-step anaerobic digestion process for treating city garbage includes screening, acidic fermenting for hydrolyzing and acidifying, regulating pH value, and methane fermenting for decomposing the macromoleculae into methane, CO2 and short-chain fatty acid, so generating marsh gas. Its advantages are high reaction efficiency, treating capacity and content of methane, and short fermenting time.
Description
Technical field: the present invention relates to a kind of treatment process of municipal wastes anaerobic digestion, relate in particular to a kind of two step of municipal wastes Anaerobic Digestion technology.
Background technology: the organic content in the municipal wastes is higher, adopts Anaerobic Digestion that organic pollutant is converted into methane, can realize the recycling of municipal wastes.It is to utilize anaerobion that organism is converted into methane, carbonic acid gas and simple organism that municipal wastes is carried out Anaerobic Digestion.Wherein play a major role is acid-producing bacteria and methanogen two big floras.And acid-producing bacteria is different to environmental requirement with methanogen.Acid-producing bacteria is a facultative anaerobe to the subject range broad of environment, is suitable for surviving under sour environment, and is very fast to organism acidifying speed.And methanogen is strict anerobe, and is comparatively harsh to the acid-basicity requirement of environment, requires the environment of neutral meta-alkalescence, and product methane speed is slower, is the restriction stage of digestive process speed.Adopt traditional rubbish to make compost producing methane, produce acid and methanogen are finished anaerobic digestion in the homogeneous reaction device whole process, rubbish acid process formation lot of organic acids very easily suppresses the growth of methanogen.Acid-producing bacteria and methanogen are not in best envrionment conditions.Thereby having influenced the efficient of reactor, treatment effect is undesirable.Drawbacks limit such as its fermentation time is long, methane content is low, fluctuation of service the application of anaerobic digestion techniques in treatment of urban garbage.
Summary of the invention: technical problem to be solved by this invention is at problems of the prior art, a kind of two step of municipal wastes Anaerobic Digestion technology is provided, to satisfy acidication and of the different requirements of product methane phase anaerobion in the anaerobic digestion of refuse process to environment, by its required separately top condition is provided, make microorganism in the whole process of refuse treatment, bring into play maximum activity, improve the processing efficiency of reactor and the methane content of the biogas that produces.
Two step of municipal wastes Anaerobic Digestion technology of the present invention, be characterized in: will send into the acid-fermentation jar through the rubbish of screening, be hydrolyzed and acidifying, then the acidizing fluid after acidifying is sent into adjusting acid-basicity and rate of load condensate in the conciliation jar, to be transported to the methane fermentation jar through the acidizing fluid of reconciling again, in the methane fermentation jar, organism further decomposes generation biogas.
The concrete steps of two step of municipal wastes Anaerobic Digestion technology of the present invention are as follows:
(a) municipal wastes is carried out the sorting fragmentation, remove the material of wherein inorganics, impurity and biological degradability difference, being crushed to particle diameter is 5-15mm, and control C/N ratio is 25: 1-35: 1, the rubbish that fragmentation is good is sent into the acid-fermentation jar, reconciles solid content at 10-15%.
(b) in the acid-fermentation jar, start stirring system and heating unit, controlled temperature keeps constant temperature, sealing at 30-60 ℃, collects the gas that produces.
(c) acidizing fluid that rubbish is produced at acid-fermentation jar acidication pumps into and reconciles jar, and the pH value of reconciling acidizing fluid in reconciling jar is 6.5-7.5, COD
CrBe 3000-7000mg/L.
(d) with pump the liquid in the regulating tank is pumped into the methane fermentation jar, keeps the interior temperature of methane fermentation jar at 30-60 ℃ of constant temperature, the gas that produces is collected in sealing.
As a further improvement on the present invention, the water outlet in the described methane fermentation jar can be transported to the acid-fermentation jar or reconcile jar, to reconcile the water ratio and the load of rubbish; The described rubbish that enters in the acid-fermentation jar is the organic waste through sorting, and organic content is more than 60%; Described methane fermentation jar is upflow anaerobic sludge blanket process (UASB); The interior reservation of described acid-fermentation jar becomes 20% amount as inoculum size with fresh feed.
Two step of municipal wastes provided by the invention Anaerobic Digestion is compared with traditional anaerobic digestion process, is characterized in that acidication with the anaerobic digestion of refuse whole process separated in different reactors with product two stages of methane to carry out.The reactor that separates has separately guaranteed that acid-producing bacteria and methanogen are in best envrionment conditions, the activity that performance is maximum.Acid process has improved the biodegradability of rubbish, and larger molecular organics is broken down into methane, carbonic acid gas and short chain fatty acid etc., and acidizing fluid provides suitable matrix mutually for methane.Avoided owing to forming the growth that a large amount of organic acids suppress methanogen at the product acid phase.Rate of load condensate by suitable controlling reactor can make the sour phase reactor of product and produce the mutual co-ordination of methane phase reactor.In this technology, system's operation is more stable, and the efficient of reactor is higher, and processing power is bigger, and methane content is higher, and fermentation time is shorter.
Description of drawings: Fig. 1 is a process route chart of the present invention.
Fig. 2 is a technical process simplified schematic diagram of the present invention.
1 is the acid-fermentation jar among Fig. 2, and 3 is regulating tank, and 5 is the methane fermentation jar, and 7 is gas holder, and 2,4,6 is liquid delivery pump.
Embodiment:
1,2 further specify embodiments of the present invention in conjunction with the accompanying drawings.
(a) gather new refuse and carry out sorting, remove inorganics wherein, component of refuse comprises food waste (55%), market rubbish (30%) and leaf weeds (10%) and other foreign material, organic content is 70%, the C/N ratio is 25: 1, and it is 10mm that wherein organism 20Kg is crushed to particle diameter, regulates solid content 15%; (b) rubbish is transported in the acid-fermentation jar 1 ferments, temperature is controlled at 35 ℃, constant temperature, and the collection and confinement of gases of generation is in gas holder 7; (c) acidizing fluid that produces is pumped into conciliation jar 3 through pump 2, use Na
2CO
3Reconcile to pH value 7.2, COD reconciling a jar interior acidizing fluid
Cr5000mg/L; (d) will be transported to methane fermentation jar 5 through pump 4 through the acidizing fluid of reconciling, the methane fermentation jar adopts upflow anaerobic sludge blanket process (UASB), 35 ℃ of temperature controls, and constant temperature, the collection and confinement of gases of generation is in gas holder 7; (e) water outlet of methane fermentation jar is back to the acid-fermentation jar in order to regulate solid content and load (as shown in Figure 2) via pump 6, reaches 75%, methane content 70% through measuring organic removal rate.
(a) gather new refuse and carry out sorting, remove inorganics wherein, component of refuse comprises food waste (60%), market rubbish (20%) and leaf weeds (10%) and other foreign material, organic content is 75%, the C/N ratio is 30: 1, and it is 10mm that wherein organism 20Kg is crushed to particle diameter, regulates solid content 20%; (b) rubbish is transported in the acid-fermentation jar 1 ferments, temperature is controlled at 35 ℃, constant temperature, and the collection and confinement of gases of generation is in gas holder 7; (c) acidizing fluid that produces is pumped into conciliation jar 3 through pump 2, uses Na
2CO
3Reconcile to pH value 7, COD reconciling a jar interior acidizing fluid
Cr5500mg/L; (d) will be transported to methane fermentation jar 5 through pump 4 through the acidizing fluid of reconciling then, the methane fermentation jar adopts upflow anaerobic sludge blanket process (UASB), and temperature is controlled at 35 ℃, constant temperature, and the collection and confinement of gases of generation is in gas holder 7; (e) water outlet of methane fermentation jar is back to the acid-fermentation jar in order to regulate solid content and load (as shown in Figure 2) via pump 6, reaches 70%, methane content 72% through measuring organic clearance.
Claims (6)
1, a kind of two step of municipal wastes Anaerobic Digestion technology, it is characterized in that: will send into the acid-fermentation jar through the rubbish of screening, be hydrolyzed and acidifying, then the acidizing fluid after acidifying is sent into adjusting acid-basicity and rate of load condensate in the conciliation jar, to be transported to the methane fermentation jar through the acidizing fluid of reconciling again, organism further decomposes generation biogas in the methane fermentation jar;
2, two step of municipal wastes Anaerobic Digestion technology according to claim 1, the concrete steps of this technology are:
(a) municipal wastes is carried out the sorting fragmentation, remove the material of wherein inorganics, impurity and biological degradability difference, being crushed to particle diameter is 5-15mm, and control C/N ratio is 25: 1-35: 1, the rubbish that fragmentation is good is sent into the acid-fermentation jar, reconciles solids content at 10-15%;
(b) in the acid-fermentation jar, start stirring system and heating unit, controlled temperature keeps constant temperature, sealing at 30-60 ℃, collects the gas that produces.
(c) acidizing fluid that rubbish is produced at acid-fermentation jar acidication pumps into and reconciles jar, and the pH value of reconciling acidifying liquid in reconciling jar is 6.5-7.5 and COD
CrBe 3000-7000mg/L;
(d) with pump the liquid in the regulating tank is pumped into the methane fermentation jar, keeps the interior temperature of methane fermentation jar at 30-60 ℃ of constant temperature, the gas that produces is collected in sealing;
3, two step of municipal wastes Anaerobic Digestion technology according to claim 2, it is characterized in that: the water outlet in the methane fermentation jar can be transported to the acid-fermentation jar or reconcile jar.
4, according to claim 2,3 described two step of municipal wastes Anaerobic Digestion technologies, it is characterized in that the described organic content of the rubbish in the acid-fermentation jar that enters is more than 60%.
5, two step of municipal wastes Anaerobic Digestion technology according to claim 4 is characterized in that described methane fermentation jar is upflow anaerobic sludge blanket process (UASB).
6, two step of municipal wastes according to claim 5 Anaerobic Digestion technology is characterized in that keeping in the described acid-fermentation jar and becomes 20% amount as inoculum size with fresh feed.
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| CNB031180388A CN1220559C (en) | 2003-01-23 | 2003-01-23 | Technique of two steps of anaerobic digestion for handling city garbage |
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| CNB031180388A CN1220559C (en) | 2003-01-23 | 2003-01-23 | Technique of two steps of anaerobic digestion for handling city garbage |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007059688A1 (en) * | 2005-11-26 | 2007-05-31 | Liguo Ma | A method and an apparatus to produce biogas |
| CN101973796A (en) * | 2010-10-19 | 2011-02-16 | 北京元黄科技有限公司 | Organic waste treatment device and method |
| CN101987796A (en) * | 2010-11-15 | 2011-03-23 | 天津市庆烁环保工程有限公司 | Two-stage dry anaerobic fermentation process of Chinese medicine residue |
| CN101549905B (en) * | 2009-05-07 | 2011-04-20 | 上海康振环境科技有限公司 | Organic waste water anaerobic treatment method |
| CN102492728A (en) * | 2011-12-02 | 2012-06-13 | 同济大学 | Rancidity-prone waste biogas utilization method based on in-subarea inoculation and quick start |
| WO2012075756A1 (en) * | 2010-12-09 | 2012-06-14 | 潍坊金丝达实业有限公司 | Resource utilizing method of refuses in urban and rural |
| US8329455B2 (en) | 2011-07-08 | 2012-12-11 | Aikan North America, Inc. | Systems and methods for digestion of solid waste |
| CN104130942A (en) * | 2014-07-21 | 2014-11-05 | 哈尔滨工业大学宜兴环保研究院 | Agricultural organic waste anaerobic fermentation recovery biogas reaction apparatus and recovery method thereof |
| CN104372030A (en) * | 2014-10-20 | 2015-02-25 | 天津大学 | Method for coproducing hydrogen gas and methane by sludge-kitchen waste mixed fermentation |
| CN105062869A (en) * | 2015-07-31 | 2015-11-18 | 符放中 | Zero-residue biogas fermentation apparatus and application and biogas production method thereof |
| CN106282245A (en) * | 2016-03-23 | 2017-01-04 | 香港生产力促进局 | Novel organic waste resource reuse method and system |
| CN107629947A (en) * | 2017-11-08 | 2018-01-26 | 中国农业大学 | A kind of method and device of biomethanation and synchronized desulfuring |
| CN109401947A (en) * | 2018-10-23 | 2019-03-01 | 上海市政工程设计研究总院（集团）有限公司 | A kind of sludge and kitchen garbage are total to digestive system and its operation method |
| CN114289454A (en) * | 2022-01-11 | 2022-04-08 | 浙江工商大学 | Perishable garbage anaerobic fermentation device and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101314551B (en) * | 2007-06-01 | 2011-12-14 | 中国科学院过程工程研究所 | Apparatus and method for producing sludge gas with organic castoff |
-
2003
- 2003-01-23 CN CNB031180388A patent/CN1220559C/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007059688A1 (en) * | 2005-11-26 | 2007-05-31 | Liguo Ma | A method and an apparatus to produce biogas |
| CN101549905B (en) * | 2009-05-07 | 2011-04-20 | 上海康振环境科技有限公司 | Organic waste water anaerobic treatment method |
| CN101973796A (en) * | 2010-10-19 | 2011-02-16 | 北京元黄科技有限公司 | Organic waste treatment device and method |
| CN101987796A (en) * | 2010-11-15 | 2011-03-23 | 天津市庆烁环保工程有限公司 | Two-stage dry anaerobic fermentation process of Chinese medicine residue |
| CN101987796B (en) * | 2010-11-15 | 2013-01-30 | 天津市庆烁环保工程有限公司 | Two-stage dry anaerobic fermentation process of Chinese medicine residue |
| WO2012075756A1 (en) * | 2010-12-09 | 2012-06-14 | 潍坊金丝达实业有限公司 | Resource utilizing method of refuses in urban and rural |
| US9776224B2 (en) | 2010-12-09 | 2017-10-03 | Weifang Jinsida Industrial Co. Ltd. | Method of utilizing refuses in urban and rural |
| US9328323B2 (en) | 2011-07-08 | 2016-05-03 | Aikan North America, Inc. | Systems and methods for digestion of solid waste |
| US8329455B2 (en) | 2011-07-08 | 2012-12-11 | Aikan North America, Inc. | Systems and methods for digestion of solid waste |
| US8492134B2 (en) | 2011-07-08 | 2013-07-23 | Aikan North America, Inc. | Systems and methods for digestion of solid waste |
| CN102492728A (en) * | 2011-12-02 | 2012-06-13 | 同济大学 | Rancidity-prone waste biogas utilization method based on in-subarea inoculation and quick start |
| CN102492728B (en) * | 2011-12-02 | 2014-05-21 | 同济大学 | Rancidity-prone waste biogas utilization method based on in-subarea inoculation and quick start |
| CN104130942A (en) * | 2014-07-21 | 2014-11-05 | 哈尔滨工业大学宜兴环保研究院 | Agricultural organic waste anaerobic fermentation recovery biogas reaction apparatus and recovery method thereof |
| CN104130942B (en) * | 2014-07-21 | 2016-03-09 | 哈尔滨工业大学宜兴环保研究院 | Agricultural organic waste anaerobically fermenting reclaims biogas reaction unit and recovery method |
| CN104372030A (en) * | 2014-10-20 | 2015-02-25 | 天津大学 | Method for coproducing hydrogen gas and methane by sludge-kitchen waste mixed fermentation |
| CN105062869A (en) * | 2015-07-31 | 2015-11-18 | 符放中 | Zero-residue biogas fermentation apparatus and application and biogas production method thereof |
| CN106282245A (en) * | 2016-03-23 | 2017-01-04 | 香港生产力促进局 | Novel organic waste resource reuse method and system |
| CN106282245B (en) * | 2016-03-23 | 2023-06-02 | 香港生产力促进局 | Novel organic garbage recycling method and system |
| CN107629947A (en) * | 2017-11-08 | 2018-01-26 | 中国农业大学 | A kind of method and device of biomethanation and synchronized desulfuring |
| CN107629947B (en) * | 2017-11-08 | 2023-09-15 | 中国农业大学 | Method and device for biological methane production and synchronous desulfurization |
| CN109401947A (en) * | 2018-10-23 | 2019-03-01 | 上海市政工程设计研究总院（集团）有限公司 | A kind of sludge and kitchen garbage are total to digestive system and its operation method |
| CN109401947B (en) * | 2018-10-23 | 2023-10-20 | 上海市政工程设计研究总院（集团）有限公司 | Sludge and kitchen waste co-digestion system and operation method thereof |
| CN114289454A (en) * | 2022-01-11 | 2022-04-08 | 浙江工商大学 | Perishable garbage anaerobic fermentation device and method |
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| CN1220559C (en) | 2005-09-28 |
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