CN103305554B - Method for preparing methane and bio-fertilizer by using cassava residue - Google Patents
Method for preparing methane and bio-fertilizer by using cassava residue Download PDFInfo
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- CN103305554B CN103305554B CN201210056385.4A CN201210056385A CN103305554B CN 103305554 B CN103305554 B CN 103305554B CN 201210056385 A CN201210056385 A CN 201210056385A CN 103305554 B CN103305554 B CN 103305554B
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- methane
- anaerobic reactor
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- manioc waste
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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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
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
The invention relates to a method for preparing methane and bio-fertilizer by using cassava residue. According to the invention, a local starch factory byproduct cassava residue is directly prepared into slurry; the slurry is pumped into an anaerobic reactor; anaerobic bacteria is added, and reaction pH value, reaction temperature, stirring speed, and anaerobic fermentation time are controlled; when methane purity is 55-65%, crude methane can be obtained, and can be directly used in a boiler plant as a fuel; or the crude methane can be subjected to purification compression until a purity is higher than 97%, and the methane can be used for replacing gasoline as an automotive fuel. According to the invention, waste cassava residue is adopted as a raw material, and methane is produced through biodegradation, such that the resource is sufficiently utilized, environmental pressure is reduced, and environment is improved. Only the anaerobic reactor and a small amount of auxiliary equipment are needed to be added, such that the process provided by the invention can be realized. Therefore, economic and social benefits of the starch factory can be substantially improved.
Description
Technical field
The invention belongs to the method preparing methane and bio-feritlizer with manioc waste.
Background technology
Guangxi Zhuang Autonomous Region of China is located in subtropical zone, and cassava resource is very abundant.But due to the restriction of various condition, main only for extracting starch to most of cassava product at present, make ative starch or deep processing, a large amount of byproduct manioc wastes produced because lacking effective treatment process major part with discharge of wastewater or with refuse treatment.Because the cassava quantity of slag of discharging accounts for 10 ~ 16% of fresh cassava gross weight, and containing materials such as a large amount of protein, remaining starch, amino acid, Mierocrystalline celluloses in slag, very easily utilized by Institute of Micro-biology, therefore manioc waste putrid and deteriorated generation stench soon, acid ferment taste, serious environment pollution, starch factory is often full of acid smell within radius of several kilometers, is difficult to breathe fresh air season in cassava purchase.If dealt with improperly, not only pulp water leak into fish pond can lethal fry or waterplant, and cause the significant wastage of resource.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of take manioc waste as raw material, degraded through anaerobion, prepare the method for methane and bio-feritlizer.
The present invention solves the problems of the technologies described above with following technical scheme:
The method processing step that the present invention's manioc waste prepares methane and bio-feritlizer is:
1. raw material prepares: directly utilize the accessory substance manioc waste of local starch factory to make raw material, be mixed with the slurries that total solid content TS is 4%-10%;
2. step 1 gained slurries are pumped into anaerobic reactor: adopt lower charging, top discharge, intercycle mode, continuously feeding continuous discharge; Add anerobe to anaerobic reactor to react; To methane purity be 55 ~ 65% thick methane phase, output to gas storage holder, surplus slag squeezes into bio-feritlizer;
3. the thick methane phase of step 2 gained is collected into wet storage holders, can be directly used in the boiler shop burning steam supply of our factory, reduce the fuel consumption of boiler shop; The thick methane phase of gained also can be delivered to Fuel Gas Plant and reach purity more than 97% through purification compression, directly in order to replace gasoline to make fuel for motor vehicle.
When TS is 6%, best comprehensive benefit can be realized.
The commercially available bacterial classification methanogen Methanogenus of anerobe, drops into anaerobic reactor, within 4 days-10 days, adds a bacterial classification after ectogenesis.
In anaerobic reactor, feed rate controls at 50 ~ 80 meters
3/ hour, control pH value in reaction 5.0 ~ 6.8, temperature of reaction 25 ~ 45 DEG C, stirring velocity 30 ~ 50 revs/min, 10 ~ 15 days anaerobically fermenting time.
The present invention's manioc waste prepares the method for methane and bio-feritlizer, utilize the refuse manioc waste of starch factory to be raw material, produce methane through biological degradation, take full advantage of resource, alleviate the environmental protection pressure of starch factory waste residue, waste water, improve atmospheric pollution and living environment; Potato slag and pulp water are after the biological degradation of anaerobic reactor, and COD drops to below 500mg/L by original about 10000mg/L, realize the qualified discharge of back segment smoothly; And after only increasing anaerobic reactor and a small amount of support equipment, just can realize the circulation of whole production environmental protection, significantly improve economic benefit and the social benefit of starch factory.
Accompanying drawing explanation
Microbial activities situation photo when Fig. 1 is anaerobic reactor charging.
Microbial activities situation photo when Fig. 2 is anaerobic reactor discharging.
Embodiment
The present invention utilizes manioc waste for raw material, makes starch remaining in potato slag, protein and Mierocrystalline cellulose etc. by fermentation, changes into and produces the nutritive ingredient that alcohol methanogen is produced in acid.In anaerobic reactor, under suitable pH value, temperature and agitation as appropriate, through the degraded of anaerobion, final product is methane and bio-feritlizer.
When manioc waste enters anaerobic reactor, total plate count multiple types is also many, and bacterial activity ability is strong; When discharging from anaerobic reactor, the few kind of total plate count is also few, and bacterial activity ability is slightly weak.
The processing step preparing the method for methane and bio-feritlizer with manioc waste is;
1. raw material prepares: gather materials on the spot, directly utilize the accessory substance manioc waste of starch factory to be raw material, pulp water is mixed with the slurries that total solid content TS is 4%-10%, (slag: water=4 ~ 10: 96 ~ 90).When TS is 6%, can realize the economic benefit of comprehensive the best, manioc waste per ton can produce purity 55-65% methane gas 60-80M
3.
2. step 1 gained slurries are pumped into anaerobic reactor: adopt lower charging, top discharge, intercycle mode, measured by magnetic flow meter, according to material balance, continuously feeding continuous discharge; Feed rate controls at 50 ~ 80 meters
3/ hour; Anerobe is added to anaerobic reactor.In anaerobic reactor, control pH value in reaction 5.0 ~ 6.8, temperature of reaction 25 ~ 45 DEG C, stirring velocity 30 ~ 50 revs/min, 10 ~ 15 days anaerobically fermenting time; Microorganism cells fission, degraded produce methane; To methane purity be 55 ~ 65% thick methane phase, output to gas storage holder; Surplus slag squeezes into bio-feritlizer;
3. the thick methane phase of step 2 gained is collected into wet storage holders, can be directly used in the boiler shop burning steam supply of our factory, reduce the fuel consumption of boiler shop; The thick methane phase of gained also can be delivered to Fuel Gas Plant and reach purity more than 97% through purification compression, directly in order to replace gasoline to make fuel for motor vehicle.
Be below the processing parameter of a kind of anaerobic reactor used and employing when the applicant's manioc waste prepares methane and bio-feritlizer:
The commercially available bacterial classification methanogen Methanogenus of anerobe, drops into anaerobic reactor, within 4 days-10 days, adds a bacterial classification, add 0.5-1.5 ton strain liquid each time after ectogenesis.
Anaerobic reactor: volume 1 ten thousand stere, aerogenesis 600-700 cube m/h.Feed rate is 50-80 cube m/h, temperature of reaction 25 ~ 45 DEG C, pH value 5.0 ~ 6.8.The total solid content TS of charging is 6%-10%, and the anaerobically fermenting time is 10 ~ 15 days.(charging is cassava pulp water and partial reflux mud to pass in and out feed liquid every day, discharging is through anaerobic reaction mud) about 1400 cubic metres, the bio-feritlizer about 20 ~ 40 tons that squeezing is produced, bio-feritlizer moisture content 74-80%, can be directly used in using of flowers or farm crop.
In anaerobic reactor, paddle diameter about 3 meters, stirring velocity 30 ~ 50 revs/min, ensure that material is even, reaction can fully be carried out.
Embodiment 1
With the manioc waste of amount 5% starch-containing in raw material slag for raw material, feeding temperature 30-33 DEG C, reactor temperature 35-38 DEG C, pH value 5.0-6.2, TS=4%; Inlet amount 68 cubes ms/h.
Follow the tracks of the gas production rate within a day:
Embodiment 2
With the manioc waste of amount 9% starch-containing in raw material slag for raw material, feeding temperature 30-33 DEG C, reactor temperature 35-38 DEG C, pH value 6.0-6.5, TS=6%; Inlet amount 66 cubes ms/h.
Follow the tracks of the gas production rate within a day:
Embodiment 3
With the manioc waste of amount 7% starch-containing in raw material slag for raw material, feeding temperature 30-33 DEG C, reactor temperature 35-38 DEG C, pH value 6.0-6.8, TS=8%; Inlet amount 55 cubes ms/h.Follow the tracks of the gas production rate within a day:
Claims (1)
1. prepare a method for methane and bio-feritlizer with manioc waste, processing step is:
(1) raw material prepares: directly utilize the accessory substance manioc waste of starch factory to be raw material, preparation slurries;
By step (1) gained slurries pump into anaerobic reactor, adopt lower charging, top discharge, intercycle mode to carry out anaerobic reaction, obtain thick methane phase;
Step (2) the thick methane phase of gained be collected into gas storage holder, can be directly used in our factory boiler shop burning steam supply; Also more than 97% can be reached, directly in order to replace gasoline to make fuel for motor vehicle through Fuel Gas Plant compression of purifying; Surplus slag squeezes into bio-feritlizer;
It is characterized in that:
The total solid content TS of step slurries is (1) 4%-6%;
Step anaerobic reactor (2) adopts continuously feeding continuous discharge;
Step (2) within 4 ~ 10 days, add an anerobe bacterial classification to anaerobic reactor;
In step anaerobic reactor (2), feed rate controls at 50 ~ 80 meters
3/ hour, control pH value in reaction 5.0 ~ 6.8, temperature of reaction 35-38 DEG C, stirring velocity 30 ~ 50 revs/min, 10 ~ 15 days anaerobically fermenting time;
Manioc waste and pulp water are after the biological degradation of anaerobic reactor, and COD drops to below 500mg/L by original 10000mg/L, and manioc waste per ton can produce purity 55-65% methane gas 60-80M
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210056385.4A CN103305554B (en) | 2012-03-06 | 2012-03-06 | Method for preparing methane and bio-fertilizer by using cassava residue |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210056385.4A CN103305554B (en) | 2012-03-06 | 2012-03-06 | Method for preparing methane and bio-fertilizer by using cassava residue |
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| Publication Number | Publication Date |
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| CN103305554A CN103305554A (en) | 2013-09-18 |
| CN103305554B true CN103305554B (en) | 2015-02-18 |
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| CN201210056385.4A Expired - Fee Related CN103305554B (en) | 2012-03-06 | 2012-03-06 | Method for preparing methane and bio-fertilizer by using cassava residue |
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| CN103588529B (en) * | 2013-11-07 | 2015-06-03 | 广西壮族自治区水力机械研究所 | Fertilizer for tea trees and water and fertilizer application method for tee trees |
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2012
- 2012-03-06 CN CN201210056385.4A patent/CN103305554B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 木薯渣厌氧发酵制取沼气的研究;刘坚;《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》;20110315(第03期);1-59 * |
| 王星等.污泥生物处理技术.《污泥生物处理技术》.冶金工业出版社,2010,55-59. * |
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| CN103305554A (en) | 2013-09-18 |
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