CN103805638A - Aerobic and anaerobic serial pretreatment method for corn straw microorganisms - Google Patents
Aerobic and anaerobic serial pretreatment method for corn straw microorganisms Download PDFInfo
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- CN103805638A CN103805638A CN201210451259.9A CN201210451259A CN103805638A CN 103805638 A CN103805638 A CN 103805638A CN 201210451259 A CN201210451259 A CN 201210451259A CN 103805638 A CN103805638 A CN 103805638A
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Abstract
The invention relates to an aerobic and anaerobic serial pretreatment method for corn straw microorganisms. The method comprises the following steps: cleaning harvested fresh corn straw, chopping and adjusting the humidity; filling into a special airtight facility and compacting; covering with a plastic film for treating for about 30 days; performing aerobic and anaerobic combined pretreatment on the straw by using oxygen and florae carried by the straw, wherein the treated straw is applied to biogas fermentation. The method belongs to the field of waste recycling. The harvested corn straw is directly smashed, sealed and filled, so that fire resistance, rain prevention and mold prevention of marsh gas engineering raw materials are realized during storage and the problems of large occupation area and high potential safety hazard due to direct storage are solved; microorganism aerobic and anaerobic serial pretreatment is performed automatically in the sealed facility by using the air and oxygen and florae carried by the corn straw, so that the problems of high pretreatment cost and complexity in operation are solved; compared with untreated straw, the anaerobic digestion biogas production rate of the corn straw treated by using the method is increased by 20 percent, and the gas production rate is increased by 15 percent.
Description
Technical field
The present invention relates to a kind of maize straw pretreatment method, specifically by maize straw being cleaned, shred, is adjusted humidity, encapsulation process etc., utilize the self-contained oxygen of stalk and flora to carry out microorganism aerobic and serially anerobic pre-treatment, the pretreatment process of realizing the effective storage of maize straw and efficient anaerobic digestion aerogenesis, belongs to utilization of waste as resource field.
Background technology
Straw anaerobic digestion techniques can reach the multiple effects such as energy recovery, material cycle, environment protection and promotion increasing peasant income, is important one of mode of utilizing of China's agricultural crop straw, is subject to gradually attention and the support of the Chinese government.The main component of maize straw is Mierocrystalline cellulose, hemicellulose and xylogen, accounts for 80% of stalk total amount.Mierocrystalline cellulose, hemicellulose are easily decomposed and utilize by anaerobion, and filled with lignin in cellulose skeleton compared with difficult degradation, and xylogen is cross-linked with each other with Mierocrystalline cellulose and hemicellulose in cell walls, make Mierocrystalline cellulose and other Fermentable substrate blame to be utilized by anaerobion or enzyme liberating, directly carry out anaerobic digestion, there will be and start the problems such as slow, efficiency is low, stalk trans-utilization rate is low.The experimental results shows; stalk preconditioning technique can destroy between xylogen, Mierocrystalline cellulose, hemicellulose and xylogen and connect; and it is carried out to pre-degraded to a certain degree; effectively improve straw anaerobic digestic property; therefore, effectively pretreatment mode is prerequisite and the key that realizes stalk mass-producing energy conversion.
Common straw pretreatment method comprises Physical, chemical method, biological process etc.Physical method has mechanical disintegration, ultrasonication, puffing, microwave treatment, steam explosion etc., its object is mainly the contact area that increases anaerobion and matrix, or make stalk after treatment be easier to digestion by destroying cell wall structure, physical method is simple to operate, treatment time is short, but energy consumption is large.Chemical process mainly contains ammonification, alkalization, acidifying etc., can change chemical constitution, structure and the physical properties of stalk, and after processing, straw anaerobic digestive efficiency is high, but complicated operation easily forms secondary pollution.Biological method is to utilize the microorganism with strong lignocellulose degradation ability to carry out biological degradation to stalk, destroy the connection between Mierocrystalline cellulose-xylogen-hemicellulose, there is treatment condition gentleness, there is no environmental pollution, high treating effect, but the preparation process complexity of the cultivation of microorganism species and microbial inoculum is high to environmental requirement.Above method all exists processing cost high, is not easy to engineering and the problem such as applies.
Summary of the invention
For overcoming above-mentioned deficiency, the invention provides a kind of maize straw microorganism aerobic and serially anerobic pretreatment process.
Microorganism aerobic serially anerobic pretreatment process of the present invention, in the maize straw harvest season, fresh maize straw is cleaned, shreds, adjusted after humidity, be packed into compacting in airtight special facilities, and process about 30 days with plastics film capping, process and rely on the aerobic intensification of oxygen remaining in stalk early stage, after oxygen depletion in environment, rely on anaerobic acidification microorganism to carry out anaerobic acidification to stalk, thereby realize the aerobic-anaerobic combined pretreatment of maize straw.
Maize straw of the present invention, refers to the stalk of fresh results, and the blue or green stalk that water ratio is higher and the lower dry straw of water ratio all can.With machinery chopping, length is no more than 3 centimetres, and adjusts water ratio to 60-70% according to the dry wet situation of raw material.
Special facilities of the present invention, bottom and surrounding can be built into brick, concrete, also can use plastics film paving, need to guarantee water-tight, air tight.
Pretreatment process of the present invention, stalk successively need be packed in special facilities, often fill out 30 centimetres, the method compactings such as employment is stepped on, mechanically rolling, while being filled to 2-3 rice above ground level, with the capping of monoblock plastics film, then press the soil compaction of thick layer 20-30 centimetre, prevent that air and rainwater from entering, encapsulation process is about 30 days.
Pretreatment process of the present invention, can pass judgment on pretreating effect according to the smell, quality of stalk after processing, the raw material with the stalk of strong tart flavour and the loose softness of quality most suitable as biogas engineering.
The invention has the beneficial effects as follows: after maize straw results, directly pulverize, sealing filling, can solve fire prevention in biogas engineering storage process, rainproof, anti-ly go rotten and directly store the problem that floor space is large, potential safety hazard is high; Rely on maize straw self-contained air and flora, in SLD, spontaneously carry out microorganism aerobic and serially anerobic pre-treatment, can solve that cost in preprocessing process is high, the problem of complicated operation; Through the method for the invention maize straw after treatment, improve 20% than the anaerobic digestion gas production speed of untreated stalk, gas production rate improves 15%.
Embodiment
The concrete operation method of microorganism aerobic serially anerobic pretreatment process of the present invention is as follows:
(1) crushed stalk.After maize straw results, reject and rot and with the stalk of silt, residue stalk is transported between straw methane engineering pulverizes, and with machinery choppings such as pulverizers, length is no more than 3 centimetres, accomplish with receiving with fortune as far as possible, with fortune with cutting, can not airing or heap let slip for a long time;
(2) stalk adjustment.According to the dry substance concentration of operation (1) gained raw material, when high, add amount of water, airing or add the siccative such as wood chip, wheat bran when low, adjusts humidity and makes it remain on 60-70%;
(3) stalk filling.Stalk after operation (2) is packed in the special facilities of bottom and the sealing that for surrounding, brick, concrete are built into as early as possible, or all uses plastics film paving, prevents infiltration and gas leakage.In filling process, will spread out at any time, successively fill up, often fill out 30 centimetres, the method compactings such as employment is stepped on, mechanically rolling, pay special attention to four jiaos of compactings, prevent from subsiding in treating processes.When stalk is filled to 2-3 rice above ground level, with the capping of monoblock plastics film, then press the soil compaction of thick layer 20-30 centimetre, prevent that air and rainwater from entering;
(4) stalk aerobic-anaerobic series connection pre-treatment.Stalk is stacked and is stored about 30 days.The storage initial stage, stalk relies on self-contained oxygen and aerobic microbiological to carry out aerobic hyperthermic treatment, after oxygen depletion, stalk utilizes anaerobion to carry out anaerobically fermenting pre-treatment under oxygen free condition, after raw material has tart flavour and the loose softness of quality, can take as biogas engineering raw material.
Claims (6)
1. a maize straw microorganism aerobic serially anerobic pretreatment process, in the maize straw harvest season, fresh maize straw is cleaned, shreds, adjusted after humidity, layering is packed into compacting in airtight special facilities, and process about 30 days with plastics film capping, rely on the self-contained air of stalk and flora to realize the aerobic-anaerobic combined pretreatment of maize straw.
2. maize straw microorganism aerobic serially anerobic pretreatment process as claimed in claim 1, is characterized in that: all applicable present method of dry straw that the blue or green stalk that water ratio is higher and water ratio are lower.
3. maize straw microorganism aerobic serially anerobic pretreatment process as claimed in claim 2, is characterized in that: described straw powder is broken into the thin segment that is no more than 3 centimetres, and adjusts water ratio to 60-70% according to its dry wet situation.
4. maize straw microorganism aerobic serially anerobic pretreatment process as claimed in claim 1, is characterized in that: described special facilities bottom and surrounding can be built into brick, concrete, also can use plastics film paving, guarantee sealed state.
5. maize straw microorganism aerobic serially anerobic pretreatment process as claimed in claim 1, is characterized in that: maize straw encapsulation process about 30 days in special facilities.
6. maize straw microorganism aerobic serially anerobic pretreatment process as claimed in claim 1, is characterized in that: pass judgment on pretreating effect according to the smell, quality of stalk after processing, after processing, treatment effect is good with strong tart flavour and the loose softness of quality for stalk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210451259.9A CN103805638A (en) | 2012-11-13 | 2012-11-13 | Aerobic and anaerobic serial pretreatment method for corn straw microorganisms |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210451259.9A CN103805638A (en) | 2012-11-13 | 2012-11-13 | Aerobic and anaerobic serial pretreatment method for corn straw microorganisms |
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| CN103805638A true CN103805638A (en) | 2014-05-21 |
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| CN201210451259.9A Pending CN103805638A (en) | 2012-11-13 | 2012-11-13 | Aerobic and anaerobic serial pretreatment method for corn straw microorganisms |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106520621A (en) * | 2016-11-30 | 2017-03-22 | 北京中科奥倍超声波技术研究院 | Method for producing cellulose for additive through biological ultrasonic waves |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560525A (en) * | 2009-07-07 | 2009-10-21 | 天津大学 | Biomass pretreatment method, method and equipment for preparing firedamp by biomass anaerobic fermentation |
| US20100159518A1 (en) * | 2008-12-19 | 2010-06-24 | E. I. Du Pont De Nemours And Company | Organic solvent pretreatment of biomass to enhance enzymatic saccharification |
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2012
- 2012-11-13 CN CN201210451259.9A patent/CN103805638A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100159518A1 (en) * | 2008-12-19 | 2010-06-24 | E. I. Du Pont De Nemours And Company | Organic solvent pretreatment of biomass to enhance enzymatic saccharification |
| CN101560525A (en) * | 2009-07-07 | 2009-10-21 | 天津大学 | Biomass pretreatment method, method and equipment for preparing firedamp by biomass anaerobic fermentation |
Non-Patent Citations (3)
| Title |
|---|
| ZHOU SHUXIA ET AL: "Pretreatment for biogas production by anaerobic fermentation of mixed corn stover and cow dung", 《ENERGY》 * |
| 周玮等: "不同处理秸秆中温厌氧发酵的产气效果", 《中国沼气》 * |
| 李延云: "青贮饲料制作技术", 《农村实用工程技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106520621A (en) * | 2016-11-30 | 2017-03-22 | 北京中科奥倍超声波技术研究院 | Method for producing cellulose for additive through biological ultrasonic waves |
| CN106520621B (en) * | 2016-11-30 | 2019-12-13 | 北京中科奥倍超声波技术研究院 | Method for producing cellulose for additive by biological ultrasonic wave |
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Application publication date: 20140521 |