CN105036500A - Method for improving anaerobic digestion efficiency of organic wastes and content of methane in biogas - Google Patents
Method for improving anaerobic digestion efficiency of organic wastes and content of methane in biogas Download PDFInfo
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- CN105036500A CN105036500A CN201510447011.9A CN201510447011A CN105036500A CN 105036500 A CN105036500 A CN 105036500A CN 201510447011 A CN201510447011 A CN 201510447011A CN 105036500 A CN105036500 A CN 105036500A
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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
Abstract
The invention belongs to the field of solid waste recycling, in particular relates to a method for improving the anaerobic digestion efficiency of organic wastes and the content of methane in biogas. The method mainly includes the following steps: firstly, concentrating the microorganism during the whole anaerobic digestion process in two anaerobic digestion systems which are connected in series, wherein hydrolysis fermented bacteria are concentrated in the first section, acetic acid bacteria and methanogens are concentrated in the second section, and the concentration process of the microorganism in different sections is realized by adjusting the temperature and microorganism standing time in each section; on the basis, feeding the gas (mainly includes CO2 and H2) produced in the first section into the anaerobic digestion system in the second section, wherein CO2 and H2 are synthesized into CH4 in the anaerobic digestion system in the second section, so that the content of the methane in biogas and the overall methane productivity of the system are increased. The technology disclosed by the invention increases the methane productivity of the anaerobic digestion system and the concentration of the methane in biogas through intensified degradation and methane synthesis.
Description
Technical field
The invention belongs to solid wastes recycling field, relate to a kind of method promoting organic waste anaerobic digestion efficiency and methane content of bilogas.
Background technology
Along with the quickening of China's Development of China's Urbanization, the waste amount produced in city is also along with remarkable increase.For typical urban biomass waste municipal sludge and domestic refuse, the year generating capacity about 3,600 ten thousand tons of mud, domestic refuse volume of cargo in storage is more than 7,000,000,000 tons, both generating capacities all increase with the speed of annual about 10%, traditional landfill, the mode such as air storage and outward transport cannot adapt to increasingly strict process disposal standard, in recent years, global energy structure just to experience with fossil energy for main to various energy resources and the transformation in the direction of depositing, the problem such as grain security and environmental degradation also becomes increasingly conspicuous, adopt anaerobic digestion techniques reclaim in biomass waste non-grain biomass energy---biogas is paid attention to gradually.
In the anaerobic digestion process of biomass waste, the microorganism participating in material and Conversion of energy mainly comprises fermenting bacteria, hydrogen-producing acetogenic bacteria, homoacetogenic bacteria and methanogen, organic methanation is exactly under the effect of these microorganisms, is realized by a series of biochemical conversion.These processes can simply be divided into two steps, and one is hydrolysis, acidifying and acetoxylation, and two be intermediate product acetic acid, hydrogen and carbon dioxide conversion is methane.Therefore, the environment that these microorganisms are in its metabolism suitable is maintained most important for the efficiency and stability ensureing anaerobic digester system.But, in anaerobic digestion process, the suitableeest physicochemical environment such as temperature, the pH value etc. that participate in this few quasi-microorganism of biochemical reaction are different, in traditional anaerobic digestion process, these reactions are being carried out in same reactor simultaneously, different microorganisms is all in identical physicochemical environment, does not have maximizedly to realize anaerobic digestion efficiency.The suitable condition being maintained suitable different microorganisms growth metabolism by multiphase system respectively will contribute to improving anaerobic digestion efficiency.For anaerobic digester system, anaerobic digestion efficiency is mainly reflected on organic degradation rate, in addition, the methane content in the methane production of anaerobic digester system, biogas is also measurement anaerobic digester system important parameter whether in shape.And the lifting of methane content of bilogas and methane production can by realizing the control of methane phase substrate and the lifting of methanogen activity.
About improving organic anaerobic digestion efficiency, current existing method mainly concentrates on by physics (as heat, light, sound, electricity), chemistry (as acid, alkali) or biological (as enzyme, enhanced biological acidifying) etc. method modification pre-treatment is carried out to material, in this, as first paragraph or the first-phase of anaerobic digestion process, then carry out methanation (second segment or second-phase in this, as anaerobic digestion process).In lifting system methane production, normally by carrying, organic matter degradation rate realizes existing method indirectly.These methods are all different from technological line of the present invention.The present invention is by a kind of open method promoting organic waste anaerobic digestion efficiency and methane content of bilogas.
Summary of the invention
The object of the present invention is to provide a kind of method promoting organic waste anaerobic digestion efficiency and methane content of bilogas, by making acidication and methanation can carry out at optimum conditions respectively, and improve speed of reaction and the factor of created gase of whole anaerobic digestion process; Meanwhile, control to improve methane content of bilogas by methane phase substrate, thus promote the economic efficacy of anaerobic digester system further.
Technical scheme of the present invention is: first, is enriched in by the microorganism of whole anaerobic digestion process in the anaerobic digester system of two series connection respectively, wherein, and first paragraph enrichment hydrolysed ferment bacterium, second segment enrichment acetoxylation and methanogen.Microorganism segmentation enrichment process is by regulating the temperature of each section and the microorganism residence time to realize.On this basis, by gas (the mainly CO of first paragraph generation
2and H
2) pass in second segment anaerobic digester system, CO
2and H
2cH is synthesized in second segment anaerobic digester system
4, thus the overall methane production of the methane content improved in biogas and system.
A kind of method promoting organic waste anaerobic digestion efficiency and methane content of bilogas that the present invention proposes, the microorganism of whole anaerobic digestion process is enriched in respectively in the anaerobic reactor of two series connection, wherein, first paragraph produces acid for strengthening and produces hydrogen section, enrichment hydrolysed ferment bacterium, second segment is strengthening methane phase section, enrichment acetoxylation and methanogen; And make full use of strengthening and produce acid and produce the gas phase methane phase substrate of hydrogen section to improve methane content of bilogas.Concrete steps are as follows:
(1) strengthening is produced acid and is produced hydrogen section: using the material of high organic waste as airtight complete hybrid anaerobic reactor, control the residence time of material in this anaerobic reactor for 2-4 days in the mode of continuous or semicontinuous charging, control temperature of charge is 50-60 DEG C.Under making material be in the condition of anaerobism or anoxic, can enrichment fermenting bacteria by controlling the residence time, by control temperature of charge can the strengthening that obtains of the hydrolysis of forced fermentation bacterium further, rate of producing acid to produce sour hydrogen producing body main component be CO
2, H
2and CH
4;
(2) methane phase section is strengthened: the strengthening of step (1) gained is produced the material of discharging as strengthening methane phase section that hydrogen section is produced in acid, the residence time of material in this complete hybrid anaerobic reactor is controlled for 15-20 days in the mode of continuous or semicontinuous charging, under control material is in anaerobic condition, material redox potential value (ORP) is lower than-300mv, control temperature of charge is 35-37 DEG C, temperature fluctuation range is no more than ± and 1 DEG C, the material that acid product hydrogen section is produced in strengthening is rich in acetic acid and other short chain fatty acids, the approach that major part is decomposed by acetic acid under the effect of methanogen is converted into CO
2and CH
4,
(3) gas strengthening of step (1) gained being produced acid product hydrogen section passes into be strengthened in methane phase section, utilizes the hydrogen of strengthening methane phase section enrichment in step (2) to utilize type methanogen by sour for the strengthening product gas CO producing hydrogen section and generate
2and H
2synthesizing methane.
In the present invention, described high organic waste is any one in municipal sludge, organic waste etc.
In the present invention, except gas strengthening being produced acid and produce hydrogen section passes into except strengthening methane phase section in step (3), also can in strengthening methane phase section people for passing into H
2or CO
2and H
2gas mixture.
In the present invention, the mode of described continuous or semicontinuous charging is charging every day one or many.
Beneficial effect of the present invention is:
1. this technique adopts high temperature 50-60 DEG C strengthening to produce acid and produces hydrogen, improves organic acidication efficiency, is conducive to the methane phase speed improving whole technique.
2. the CO that hydrogen section is produced in acid is produced in strengthening
2and H
2obtaining further biomethanation by transferring in methanogenic phase, improve the growing amount of methane.(approach 1: acetic acid decomposes generation CO in methanogenic two approach
2and CH
4; Approach 2:CO
2and H
2synthesis CH
4), owing to fully enhancing approach 2(CO
2and H
2synthesis CH
4) effect, the methane concentration in biogas is improved.
Accompanying drawing explanation
Fig. 1. promote the method flow schematic diagram of organic waste anaerobic digestion efficiency and methane content of bilogas.
Embodiment
Further illustrate the present invention below by embodiment, but protection scope of the present invention is not limited to described content.
Embodiment 1:
Certain sludge of sewage treatment plant, adopts high temperature acidified-middle temperature methanation TPAD art breading to reclaim biogas.Wherein, the effect of high temperature acidified section is that acid product hydrogen is produced in strengthening, and acting as of middle temperature methanation section utilizes the substrate of high temperature acidified section to carry out methanation.The high temperature acidified period of residence time is 2 days, and temperature is 55 DEG C, and the discharging of high temperature acidified section enters middle temperature methanation section, and the residence time is 15 days, and temperature is 37 DEG C, and system internal oxidition reduction potential value (ORP) is lower than-300mv.After stable, recording this section of methane content of bilogas is 63-65%.For improving methane content of bilogas further, the gas of high temperature acidified section is passed into middle temperature methanation section, after stable, the methane content recorded in methanation section biogas brings up to 68-70%.
Claims (3)
1. one kind promotes the method for organic waste anaerobic digestion efficiency and methane content of bilogas, it is characterized in that the microorganism of whole anaerobic digestion process to be enriched in respectively in the anaerobic reactor of two series connection, wherein, first paragraph produces acid for strengthening and produces hydrogen section, enrichment hydrolysed ferment bacterium, second segment is strengthening methane phase section, enrichment acetoxylation and methanogen; And make full use of strengthening and produce acid and produce the gas phase methane phase substrate of hydrogen section to improve methane content of bilogas, concrete steps are as follows:
(1) strengthening is produced acid and is produced hydrogen: using the material of high organic waste as airtight complete hybrid anaerobic reactor, the residence time of material in this anaerobic reactor is controlled for 2-4 days in the mode of continuous or semicontinuous charging, control temperature of charge is 50-60 DEG C, under making material be in the condition of anaerobism or anoxic, can enrichment fermenting bacteria by controlling the residence time, by control temperature of charge can the strengthening that obtains of the hydrolysis of forced fermentation bacterium further, rate of producing acid to produce sour hydrogen producing body main component be CO
2, H
2and CH
4;
(2) methane phase is strengthened: the strengthening of step (1) gained is produced the material of discharging as strengthening methane phase section that hydrogen section is produced in acid, the residence time of material in this complete hybrid anaerobic reactor is controlled for 15-20 days in the mode of continuous or semicontinuous charging, under control material is in anaerobic condition, material redox potential value (ORP) is lower than-300mv, control temperature of charge is 35-37 DEG C, temperature fluctuation range is no more than ± and 1 DEG C, the material that acid product hydrogen section is produced in strengthening is rich in acetic acid and other short chain fatty acids, the approach that major part is decomposed by acetic acid under the effect of methanogen is converted into CO
2and CH
4,
(3) gas strengthening of step (1) gained being produced acid product hydrogen section passes into be strengthened in methane phase section, utilizes the hydrogen of strengthening methane phase section enrichment in step (2) to utilize type methanogen by sour for the strengthening product gas CO producing hydrogen section and generate
2and H
2synthesizing methane.
2. according to claim 1 based on subcritical water heat treated mud high efficient resourcing treatment process, it is characterized in that, except gas strengthening being produced acid and produce hydrogen section passes into except strengthening methane phase section in step (3), also can in strengthening methane phase section people for passing into H
2or CO
2and H
2gas mixture.
3. according to claim 1 based on subcritical water heat treated mud high efficient resourcing treatment process, it is characterized in that described high organic waste is any one in municipal sludge, organic waste.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105836994A (en) * | 2016-05-27 | 2016-08-10 | 轻工业环境保护研究所 | Intermediate-enhanced sludge digestion process |
| CN105859038A (en) * | 2016-05-17 | 2016-08-17 | 同济大学 | Sewage treatment process for efficiently utilizing carbon source in sludge |
| CN106746437A (en) * | 2017-02-20 | 2017-05-31 | 湖南大学 | A kind of method that utilization fermented type acid-producing bacteria processes high-temperature steam pyrohydrolysis sludge |
| CN109022491A (en) * | 2018-08-20 | 2018-12-18 | 山东大学 | Poultry waste hydrogen alkane fermentation coupling process for reclaiming |
| CN109439692A (en) * | 2018-11-13 | 2019-03-08 | 中国电建集团河南省电力勘探设计院有限公司 | A kind of technique of the excrement stalk mixing two-phase fermentation and biogas production of intensive intermittent feeding |
| CN110168094A (en) * | 2016-12-27 | 2019-08-23 | 卢森堡理工学院 | The biological products of enrichment for anaerobic digestion reaction vessel, the method for preparing the biological products and biological reinforced method is carried out using the product |
| CN110779947A (en) * | 2019-11-25 | 2020-02-11 | 北京化工大学 | Method for evaluating anaerobic digestion performance of lignocellulose raw material by pretreatment intensity |
| CN112680326A (en) * | 2021-01-29 | 2021-04-20 | 同济大学 | Method and system for improving yield and purity of anaerobic methane of organic solid waste |
| CN113387435A (en) * | 2021-06-16 | 2021-09-14 | 青岛科技大学 | Anaerobic digestion promotion method |
| CN113481089A (en) * | 2021-07-28 | 2021-10-08 | 河南财政金融学院 | Two-phase anaerobic fermentation system for improving methane content in biogas |
| CN113716688A (en) * | 2021-10-08 | 2021-11-30 | 合肥工业大学 | Anaerobic treatment method for coal chemical industry wastewater |
| CN113736834A (en) * | 2021-08-12 | 2021-12-03 | 同济大学 | Method for strengthening anaerobic fermentation acid production of easily degradable biomass waste |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859038A (en) * | 2016-05-17 | 2016-08-17 | 同济大学 | Sewage treatment process for efficiently utilizing carbon source in sludge |
| CN105859038B (en) * | 2016-05-17 | 2018-10-26 | 同济大学 | A kind of efficient sewage treatment process using carbon source in sludge |
| CN105836994B (en) * | 2016-05-27 | 2021-01-26 | 轻工业环境保护研究所 | Intermediate-intensified sludge digestion process |
| CN105836994A (en) * | 2016-05-27 | 2016-08-10 | 轻工业环境保护研究所 | Intermediate-enhanced sludge digestion process |
| CN110168094B (en) * | 2016-12-27 | 2023-04-25 | 卢森堡理工学院 | Enriched biologicals for anaerobic digestion reactors, methods of making the biologicals, and methods of bio-fortifying with the same |
| CN110168094A (en) * | 2016-12-27 | 2019-08-23 | 卢森堡理工学院 | The biological products of enrichment for anaerobic digestion reaction vessel, the method for preparing the biological products and biological reinforced method is carried out using the product |
| CN106746437A (en) * | 2017-02-20 | 2017-05-31 | 湖南大学 | A kind of method that utilization fermented type acid-producing bacteria processes high-temperature steam pyrohydrolysis sludge |
| CN109022491A (en) * | 2018-08-20 | 2018-12-18 | 山东大学 | Poultry waste hydrogen alkane fermentation coupling process for reclaiming |
| CN109022491B (en) * | 2018-08-20 | 2021-08-24 | 山东大学 | Hydrogen alkane fermentation coupling recycling process for poultry and livestock manure |
| CN109439692A (en) * | 2018-11-13 | 2019-03-08 | 中国电建集团河南省电力勘探设计院有限公司 | A kind of technique of the excrement stalk mixing two-phase fermentation and biogas production of intensive intermittent feeding |
| CN110779947A (en) * | 2019-11-25 | 2020-02-11 | 北京化工大学 | Method for evaluating anaerobic digestion performance of lignocellulose raw material by pretreatment intensity |
| CN112680326A (en) * | 2021-01-29 | 2021-04-20 | 同济大学 | Method and system for improving yield and purity of anaerobic methane of organic solid waste |
| CN113387435A (en) * | 2021-06-16 | 2021-09-14 | 青岛科技大学 | Anaerobic digestion promotion method |
| CN113481089A (en) * | 2021-07-28 | 2021-10-08 | 河南财政金融学院 | Two-phase anaerobic fermentation system for improving methane content in biogas |
| CN113736834A (en) * | 2021-08-12 | 2021-12-03 | 同济大学 | Method for strengthening anaerobic fermentation acid production of easily degradable biomass waste |
| CN113736834B (en) * | 2021-08-12 | 2023-11-24 | 同济大学 | Method for enhancing anaerobic fermentation acid production of easily-degradable biomass waste |
| CN113716688A (en) * | 2021-10-08 | 2021-11-30 | 合肥工业大学 | Anaerobic treatment method for coal chemical industry wastewater |
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Application publication date: 20151111 |