CN104745640A - Ultrasonic-assisted wet process anaerobic fermentation processing method for household refuse organics - Google Patents
Ultrasonic-assisted wet process anaerobic fermentation processing method for household refuse organics Download PDFInfo
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- CN104745640A CN104745640A CN201510130265.8A CN201510130265A CN104745640A CN 104745640 A CN104745640 A CN 104745640A CN 201510130265 A CN201510130265 A CN 201510130265A CN 104745640 A CN104745640 A CN 104745640A
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- anaerobic fermentation
- biogas
- slurries
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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 discloses an ultrasonic-assisted wet process anaerobic fermentation processing method for household refuse organics. The method comprises the following steps: sorting municipal household refuse; shearing and crushing the sorted household refuse; adding water to the crushed household refuse and performing wet grinding to form mixed refuse slurry; performing ultrasonic crushing and acidifying hydrolysis on the mixed refuse slurry; performing anaerobic fermentation on the acidified mixed refuse slurry; and finally collecting biogas, biogas residue and biogas slurry generated in a fermenting reactor. According to the method disclosed by the invention, mechanical crushing, wet grinding, and ultrasonic crushing are combined and work together with hydrolysis and an intermittent material charging and discharging mode in the acidification stage; therefore, a stepped anaerobic fermentation processing effect is formed, the activity of bacteria producing biogas and the continuous production of biogas can be ensured and the technical requirements of large-scale processing can be reached. The ultrasonic treatment is applied after mechanical crushing and wet grinding links, thereby ensuring the treatment efficiency of ultrasonic treatment, further shortening the production time of biogas by anaerobic fermentation and improving the biogas yield.
Description
Technical field
The present invention relates to domestic garbage resource process, specifically the organic wet method anaerobic fermentation processing method of a kind of domestic refuse of ultrasonic assistant.
Background technology
Along with socio-economic development and urban floating population increase, the quantum of output of domestic refuse increases year by year, and garbage-surrounded city phenomenon becomes increasingly conspicuous.Rubbish, without harmless treatment, exposedly to be banked up or unreasonable disposal can produce a series of impact: aggravation environmental pollution, serious harm urban environment and resident living condition.
At present, the traditional method of domestic rubbish disposal is compost, burning and landfill.Compost needs that the time is long, processing efficiency is low; The organic moiety of domestic refuse due to water content high, easily corrupt, landfill causes the problem of percolate to landfill yard; Its water content height also increases the energy consumption of waste incineration.
Inquiry data, existing Feng Lei research team utilizes ultrasonic wave respectively to after stalk, cow dung and kitchen excess pre-treatment, carry out anaerobically fermenting, find that ultrasonic pretreatment effect all has the effect of promotion to aspects such as the factor of created gase of stalk, cow dung and kitchen excess, cumulative gas, methane in sewage gas concentration and volatility organic solid clearances.But the main problem of this team's research work is: 1, for the ultrasonic pretreatment of the real life rubbish of the agriculture organic waste such as stalk, cow dung and catering trade kitchen excess instead of complicated component; 2, laboratory study is in but not the application technical research stage.
The patent of invention CN103923951A of Harbin Institute of Technology " a kind of ultrasonic/low-kappa number strengthening anaerobic fermentation of kitchen waste produce the method for acid ", mainly for the problem that organic acid productivity in anaerobic fermentation of kitchen waste is low.The main existing problems of its invention: 1, for catering trade changing food waste but not the anaerobically fermenting of municipal domestic refuse organic matter.Catering trade changing food waste has the characteristics such as high grease, high salinity, has very large difference with the present invention based on the municipal domestic refuse organic matter fractions of shade tree dead twigs and withered leaves, food market and resident's fruits and vegetables rubbish; 2, the research of complete anaerobic fermentation process is not only comprised for producing acid phase; 3, the pre-treatment of ultrasonic combined acid catalyzed degradation is more suitable for anaerobically fermenting and produces organic acid link, and pH is on the low side has inhibition to the methane phase link of follow-up anaerobically fermenting.
Summary of the invention
The object of this invention is to provide a kind of organic wet method anaerobic fermentation processing method of domestic refuse of ultrasonic assistant, by being formed methane by the biodegradable composition anaerobically fermenting of domestic refuse, and reclaiming the energy, realizing domestic garbage resource process.
Domestic waste complicated component, anaerobically fermenting also has hydrolysis and produces the rate-limiting step such as biogas, the problem such as cause that domestic refuse anaerobic fermenting speed is slow, gas production rate is less and technique is unstable.The present invention adopts machinery and the method for ultrasonic combined fragmentation, the physical property of rubbish of can making the life better, and makes organic composition in domestic refuse more facile hydrolysis at the temperature of 35-55 DEG C, improves the efficiency of organic microbiological deterioration and the factor of created gase of anaerobically fermenting.
The technical scheme realizing the object of the invention is:
The organic wet method anaerobic fermentation processing method of domestic refuse of ultrasonic assistant, comprises following steps:
(1) municipal sorting consumer waste, remove plastics bag, metal, glass and other be difficult to biodegradable raw material;
(2) domestic refuse after sorting carries out shearing-crushing, adds the water of its total amount 0.5-2.5 times volume, adopts ball mill to carry out wet-milling, forms composting slurries;
(3) the independent ultrasonication of 10-40% of overall accumulated amount in composting slurries in step (2) is got; Or the composting slurries getting 10-30% in step (2) add that the sewage plant excess sludge of its 1-2 times volume together adds ultrasonication reactor, carry out ultrasonication process;
(4) in the slurries and step (2) of ultrasonication process, remaining composting slurries together add acidification reactor, acidification hydrolization 3-5 days;
(5) acidified composting slurries add anaerobic fermentation reactor, the reactor start-up stage adds sewage plant excess sludge or cow dung is inoculated, inoculum volume is 0.3-0.5 times of acidifying mixed serum volume, anaerobically fermenting at 35-55 DEG C, collects the biogas, natural pond slag and the natural pond liquid that generate in fermentation reactor.
The energy density of the described ultrasonication process of step (3) is 0.5-1.5W/ml, and the ultrasonication treatment time is 15-30min;
Step (3) and (5) described sewage plant excess sludge be process needing beyond the municipal sewage plant active returned sluge of using by oneself, discharge or the mud disposed.
Step (5) described anaerobic fermentation reactor, adopt intermittent type input and output material, the composting slurries residence time is in the reactor 10-30 days, and the volume of each input and output material is 0.1-0.3 times of fermentation materials cumulative volume.
The present invention's domestic refuse organic matter used mainly comprises household kitchen garbage thing, fallen leaves deadwood, fruits and vegetables rubbish, throwaway chopsticks and waste paper etc.
Advantage of the present invention:
1, the inventive method is mainly for municipal domestic refuse organic matter fractions, is applicable to mass-producing process.Municipal administration domestic refuse organic matter fractions is high, the easy corruption of moisture content in rubbish, the part producing percolate, can not be recycled, not have targetedly all the time, the treatment process of mass-producing by refuse classification.Domestic refuse from segmenting in nature, is carried out anaerobically fermenting process organic moiety by the present invention, not only can produce biogas, obtains green novel energy source, is also a kind of supplementing for traditional fixed-end forces method.For landfill disposal, the volume load of landfill yard 20-30% can be alleviated, reduce the generation of percolate.For waste incineration, capable of reducing energy consumption.
2, the inventive method adopts Mechanical Crushing, wet-milling, ultrasonication combined utilization; add hydrolysis and the interval input and output material pattern of souring stage; form the treatment effect of step anaerobically fermenting, guarantee to produce the activity of biogas bacterium and the continuous output of biogas, meet the technical requirements of mass-producing process.Supersound process ensure that the processing efficiency of ultrasonication after being applied in Mechanical Crushing and wet-milling link, can shorten the time of producing methane through anaerobic fermentation further, improves factor of created gase.
The organic wet method anaerobic fermentation processing method of domestic refuse of ultrasonic assistant of the present invention, is the processing mode having more advantage compared with other treatment process, effectively can reduces refuse pollution, can produce again good economic benefit and huge environmental benefit.This waste disposal method is worth application and promotes.
Accompanying drawing explanation
Fig. 1 is the schema of the inventive method.
Embodiment
Below in conjunction with accompanying drawing, content of the present invention is further described, but is not limitation of the invention.
With reference to Fig. 1, a kind of organic wet method anaerobic fermentation processing method of domestic refuse of ultrasonic assistant, comprises following steps:
(1) municipal sorting consumer waste, remove plastics bag, metal, glass and other be difficult to biodegradable raw material;
(2) domestic refuse after sorting carries out shearing-crushing, to process 20 tons every day, adds the water that its total amount 2 times is 40 tons, adopts ball mill to carry out wet-milling, form composting slurries;
(3) 30% of overall accumulated amount in the middle composting slurries of step (2) is got, add that the sewage plant excess sludge of its 2 times of volumes together adds ultrasonication reactor, carry out ultrasonication process, the energy density of ultrasonication process is 1.5W/ml, and the ultrasonication treatment time is 30min;
(4) in the slurries and step (2) of ultrasonication process, remaining composting slurries together add acidification reactor, acidification hydrolization 3 days;
(5) acidified composting slurries add anaerobic fermentation reactor, the reactor start-up stage adds sewage plant excess sludge or cow dung inoculum, inoculum volume is 0.35 times of acidifying mixed serum volume, anaerobically fermenting at 35 DEG C, collects the biogas, natural pond slag and the natural pond liquid that generate in fermentation reactor; Anaerobic fermentation reactor, adopt intermittent type input and output material, the composting slurries residence time is in the reactor 20 days, and the volume of each input and output material is 0.2 times of fermentation materials cumulative volume.
Claims (4)
1. the organic wet method anaerobic fermentation processing method of the domestic refuse of ultrasonic assistant, is characterized in that comprising following steps:
(1) municipal sorting consumer waste, remove plastics bag, metal, glass and other be difficult to biodegradable raw material;
(2) domestic refuse after sorting carries out shearing-crushing, adds the water of its total amount 0.5-2.5 times volume, adopts ball mill to carry out wet-milling, forms composting slurries;
(3) the independent ultrasonication process of 10-40% of overall accumulated amount in composting slurries in step (2) is got; Or the composting slurries getting 10-30% in step (2) add that the sewage plant excess sludge of its 1-2 times volume together adds ultrasonication reactor, carry out ultrasonication process;
(4) in the slurries and step (2) of ultrasonication process, remaining composting slurries together add acidification reactor, acidification hydrolization 3-5 days;
(5) acidified composting slurries add anaerobic fermentation reactor, the reactor start-up stage adds sewage plant excess sludge or cow dung is inoculated, inoculum volume is 0.3-0.5 times of acidifying mixed serum volume, anaerobically fermenting at 35-55 DEG C, collects the biogas, natural pond slag and the natural pond liquid that generate in fermentation reactor.
2. treatment process according to claim 1, is characterized in that: the energy density of the described ultrasonication process of step (3) is 0.5-1.5W/ml, and the ultrasonication treatment time is 15-30min.
3. treatment process according to claim 1, is characterized in that: step (3) and (5) described sewage plant excess sludge be process needing beyond the municipal sewage plant active returned sluge of using by oneself, discharge or the mud disposed.
4. treatment process according to claim 1, it is characterized in that: step (5) described anaerobic fermentation reactor, adopt intermittent type input and output material, the composting slurries residence time is in the reactor 10-30 days, and the volume of each input and output material is 0.1-0.3 times of fermentation materials cumulative volume.
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| CN201510130265.8A CN104745640A (en) | 2015-03-25 | 2015-03-25 | Ultrasonic-assisted wet process anaerobic fermentation processing method for household refuse organics |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105541059A (en) * | 2015-12-08 | 2016-05-04 | 东北大学 | Device and method for degrading excess sludge through pretreatment-EGSB-microorganism-electrochemistry integration |
| CN111560256A (en) * | 2020-06-02 | 2020-08-21 | 潍坊工商职业学院 | Organic solid waste integrated ecological resource utilization technical method |
Citations (3)
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| JP2010098951A (en) * | 2008-10-21 | 2010-05-06 | Hitachi Zosen Corp | Method for simply collecting and reusing cellulose-saccharifying amylase |
| CN102557373A (en) * | 2011-08-01 | 2012-07-11 | 佛山市水业集团有限公司 | Treatment method of excess sludge |
| CN103923951A (en) * | 2014-05-05 | 2014-07-16 | 哈尔滨工业大学 | Method for producing acid by enhancing anaerobic fermentation of kitchen waste through ultrasonic/acid pretreatment |
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2015
- 2015-03-25 CN CN201510130265.8A patent/CN104745640A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010098951A (en) * | 2008-10-21 | 2010-05-06 | Hitachi Zosen Corp | Method for simply collecting and reusing cellulose-saccharifying amylase |
| CN102557373A (en) * | 2011-08-01 | 2012-07-11 | 佛山市水业集团有限公司 | Treatment method of excess sludge |
| CN103923951A (en) * | 2014-05-05 | 2014-07-16 | 哈尔滨工业大学 | Method for producing acid by enhancing anaerobic fermentation of kitchen waste through ultrasonic/acid pretreatment |
Non-Patent Citations (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105541059A (en) * | 2015-12-08 | 2016-05-04 | 东北大学 | Device and method for degrading excess sludge through pretreatment-EGSB-microorganism-electrochemistry integration |
| CN105541059B (en) * | 2015-12-08 | 2017-10-24 | 东北大学 | Pre-process the united excess sludge decomposition apparatus of EGSB microorganism electrochemicals and method |
| CN111560256A (en) * | 2020-06-02 | 2020-08-21 | 潍坊工商职业学院 | Organic solid waste integrated ecological resource utilization technical method |
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Application publication date: 20150701 |