CN105494320A - Method for preserving straws and preparing marsh gas - Google Patents
Method for preserving straws and preparing marsh gas Download PDFInfo
- Publication number
- CN105494320A CN105494320A CN201511029585.0A CN201511029585A CN105494320A CN 105494320 A CN105494320 A CN 105494320A CN 201511029585 A CN201511029585 A CN 201511029585A CN 105494320 A CN105494320 A CN 105494320A
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- China
- Prior art keywords
- fermentation
- lactic acid
- stalk
- biogas
- straws
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N3/00—Preservation of plants or parts thereof, e.g. inhibiting evaporation, improvement of the appearance of leaves or protection against physical influences such as UV radiation using chemical compositions; Grafting wax
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P39/00—Processes involving microorganisms of different genera in the same process, simultaneously
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/40—Preparation of oxygen-containing organic compounds containing a carboxyl group including Peroxycarboxylic acids
- C12P7/56—Lactic acid
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P2201/00—Pretreatment of cellulosic or lignocellulosic material for subsequent enzymatic treatment or hydrolysis
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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 relates to a method for preserving straws and preparing marsh gas. After sugar-containing wastewater is fermented by lactic acid, the sugar-containing wastewater is mixed with the straws, so that the preservation of the straws is realized. A lactic acid fermentation solution contains a lot of organic acids and has a relatively low pH value, so that the lactic acid fermentation solution can be used for preserving the straws under a relatively moisture content condition. Organic matters in the lactic acid fermentation solution are converted into the marsh gas in marsh gas fermentation engineering and the yield of the marsh gas can be improved. Meanwhile, the straws with relative high moisture content have a relatively soft texture and a relatively rapid marsh gas fermentation speed. With the adoption of the method, the sugar-containing wastewater is sufficiently utilized and environment pollution hidden dangers of the sugar-containing wastewater are prevented; and meanwhile, the marsh gas fermentation efficiency of the straws is also improved and guarantees are provided for large-scale utilization of the straws.
Description
Technical field
The present invention relates to a kind of method that stalk is preserved and prepared biogas, belong to biomass energy source domain.
Background technology
China is large agricultural country, and the annual agricultural crop straw produced is more than 700,000,000 tons.Stalk is generally used for papermaking, feed, biogas production etc.Current China is actively promoting large-sized biogas engineering construction, to setting up the living beings Gas Industry of China, utilizing stalk to produce biogas and having a extensive future.For large-sized biogas engineering, raw material supply is a problem needing solution badly.Under normal circumstances, stalk can be preserved when moisture content is lower.Advantage is that Techniques of preserving is simple, without particular/special requirement.During shortcoming, material water ratio is too low, and during for biogas fermentation, gas production rate is slower.Set up one and namely effectively can preserve stalk, the method that stalk gas production rate increases can be made again, for very important heavy construction.In addition, there is a lot of food processing factory in China, can produce a lot of sucrose-containing wastewater in process.Because the organic concentration of these sucrose-containing wastewaters are lower, when using it to carry out biogas production, economic benefit is not obvious.And in actual production, after anaerobic fermentation is carried out to these sucrose-containing wastewaters, also cannot reach the wastewater discharge standard of country, need to carry out further Aerobic Process for Treatment to it.Bring certain burden to enterprise like this, also add the hidden danger of the unordered discharge of these waste water simultaneously.
For overcoming the above problems, lactic fermentation liquid, by being that medium carries out lactic acid fermentation with sucrose-containing wastewater, being then added in the stalk of low water content and preserving stalk by the present invention, thus reaches comprehensive utilization sucrose-containing wastewater and preserve the object of stalk.According to method provided by the invention, stalk marsh gas rate and gas production rate are all due to traditional low moisture store method.
Summary of the invention
For solving the problem, the invention provides a kind of method that stalk is preserved and prepared biogas, the technical scheme taked is as follows:
The object of the present invention is to provide a kind of stalk to preserve and prepare the method for biogas, the method utilizes sucrose-containing wastewater to carry out lactic acid fermentation, then crops straw lower to lactic fermentation liquid and moisture content is carried out mixing and preserve, be finally used for biogas fermentation with the material after preservation.
The step of described method is as follows:
1) lactic acid fermentation: utilize sucrose-containing wastewater to carry out lactic acid fermentation;
2) crushing material: the stalk of low-water-content is pulverized;
3) mixing of materials: utilize step (1) to obtain lactic fermentation liquid and carry out mixing and preserving with the comminuting matter that step (2) obtains, control material water ratio between 60%-65%;
4) preservation: the material successively compacting that step (3) is obtained, density reaches more than 0.6kg/L, and sealing is preserved;
5) biogas fermentation: the material utilizing step (4) to obtain preservation good carries out biogas fermentation, obtains biogas.
Preferably, described agricultural crop straw is cellulosic stalk.
More preferably, described cellulosic stalk comprises maize straw, wheat stalk and rice straw, bagasse.
Preferably, lactic acid fermentation condition is: fermentation temperature 30 DEG C-42 DEG C, fermentation time 1-2 days.
Preferably, described crushing material is 2-4cm by crushed stalk to particle diameter.
Preferably, described sucrose-containing wastewater is candied date processing waste water, sugarcane processing waste water or blackstrap.
Preferably, described lactic acid fermentation, bacterial classification used is lactobacillus plantarum, moral formula lactic acid bacteria or bacillus coagulans.
Preferably, the stalk of described low-water-content, moisture is at 40%-50%.
The concrete steps of described method are as follows:
1) lactic acid fermentation: with candied date processing waste water, sugarcane processing waste water or blackstrap for fermentation substrate, inoculation lactobacillus plantarum, moral formula lactic acid bacteria or bacillus coagulans carry out lactic acid fermentation, lactic acid fermentation condition is: fermentation temperature 30 DEG C-42 DEG C, fermentation time 1-2 days, obtains lactic fermentation liquid after fermentation ends;
2) crushing material: be 2-3cm at crops stalk crushing to the particle diameter of 40-50% by moisture, obtains comminuting matter;
3) mixing of materials: utilize step (1) to obtain lactic fermentation liquid and carry out mixing and preserving with the comminuting matter that step (2) obtains, control material water ratio between 60%-65%;
4) preservation: the material successively compacting that step (3) is obtained, density reaches more than 0.6kg/L, and sealing is preserved;
5) biogas fermentation: the material utilizing step (4) to obtain preservation good carries out biogas fermentation, obtains biogas.
The beneficial effect that the present invention obtains is:
Method provided by the present invention make use of the high waste water of the sugar contents such as candied date processing waste water, sugarcane processing waste water or blackstrap, avoids the pollution of sucrose-containing wastewater to environment.Meanwhile, compared to prior art, methane yield is high, and lag phase is short, and fermentation period is short.
Accompanying drawing explanation
Fig. 1 is technical process schematic diagram of the present invention.
Specific implementation method
The following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way that " the invention will be further described that (percentage of following examples is percetage by weight if no special instructions below in conjunction with the embodiment in accompanying drawing; Quality moisture under the quality of following examples is respective conditions if no special instructions, but not dry weight).
Following examples material therefor, reagent, instruments and methods, without specified otherwise, be this area conventional material, reagent, instruments and methods, those skilled in the art all can be obtained by commercial channel.
Embodiment 1
Present embodiments provide the method employing following steps that a kind of stalk is preserved and prepared biogas:
(1) lactic acid fermentation: with candied date processing waste water for substrate, with moral formula lactobacillus for bacterial classification carries out lactic acid fermentation.Candied date processing waste water characteristic is as shown in table 1.Initial lactobacillus inoculum amount is 1x10
7individual/mL, fermentation temperature 30 DEG C, fermentation time 2 days.After fermentation ends, Lactic Acid from Fermentation Broth content is 40g/L, and bacterial content is 1x10
9individual/mL;
The fundamental property of table 1 candied date processing waste water
| Index | pH | COD/(mg/L) | BOD/(mg/L) | SS/(mg/L) |
| Numerical value | 5.0 | 28000 | 10000 | 990 |
(2) crushed stalk: stalk is pulverized, particle diameter is 2-3cm;
(3) mixing of materials: utilize step (1) to obtain lactic fermentation liquid and carry out mixing and preserving with the comminuting matter that step (2) obtains, controlling material water ratio is 65%;
(4) preservation: the material successively compacting that step (3) is obtained, density reaches more than 0.6kg/L, and sealing is preserved;
(5) biogas fermentation: the material utilizing step (4) to obtain preservation good carries out biogas fermentation, obtains biogas.Biogas fermentation characteristic is as shown in table 2.Illustrate according to the data in table 2, adopt method provided by the invention, the generation of lag phase in biogas fermentation can be avoided, improve stalk methane yield 25%, and shorten fermentation period more than 30%, there is good economic benefit.
Table 2 embodiment 1 and traditional low moisture preserve the biogas fermentation Property comparison of material
Note: D
t80for accumulation methane quantity account for total gas production 80% time, the time spent.
Embodiment 2
(1) lactic acid fermentation: with candied date processing waste water for substrate is that bacterial classification carries out lactic acid fermentation with Lactobacillus plantarum.Candied date processing waste water characteristic is as shown in table 3.Initial lactobacillus inoculum amount is 1x10
7individual/mL, fermentation temperature 42 DEG C, fermentation time 1 day.After fermentation ends, Lactic Acid from Fermentation Broth content is 40g/L, and bacterial content is 1x10
9individual/mL;
The fundamental property of table 3 candied date processing waste water
| Index | pH | COD/(mg/L) | BOD/(mg/L) | SS/(mg/L) |
| Numerical value | 5.0 | 28000 | 10000 | 990 |
(2) crushed stalk: stalk is pulverized, particle diameter is 2-3cm;
(3) mixing of materials: utilize step (1) to obtain lactic fermentation liquid and carry out mixing and preserving with the comminuting matter that step (2) obtains, controlling material water ratio is 70%;
(4) preservation: the material successively compacting that step (3) is obtained, density reaches more than 0.6kg/L, and sealing is preserved;
(5) biogas fermentation: the material utilizing step (4) to obtain preservation good carries out biogas fermentation, obtains biogas.Biogas fermentation characteristic is as shown in table 4.Illustrate according to the data in table 4, adopt method provided by the invention, the generation of lag phase in biogas fermentation can be avoided, improve stalk methane yield 37.5%, and shorten fermentation period 30%, there is good economic benefit.
Table 4 embodiment 2 and traditional low moisture preserve the biogas fermentation Property comparison of material
Note: D
t80for accumulation methane quantity account for total gas production 80% time, the time spent.
Embodiment 3
(1) lactic acid fermentation: be substrate with molasses containing waste water is that bacterial classification carries out lactic acid fermentation with bacillus coagulans.Molasses containing waste water characteristic is as shown in table 5.Diluted by blackstrap, add bacillus coagulans, playing inoculum concentration is 1x10
7individual/mL, fermentation temperature 42 DEG C, fermentation time 1 day.After fermentation ends, Lactic Acid from Fermentation Broth content is 40g/L, and thalline content is 5x10
8individual/mL;
The fundamental property of table 5 candied date processing waste water
(2) crushed stalk: stalk is pulverized, particle diameter is 2-3cm;
(3) mixing of materials: utilize step (1) to obtain lactic fermentation liquid and carry out mixing and preserving with the comminuting matter that step (2) obtains, controlling material water ratio is 70%;
(4) preservation: the material successively compacting that step (3) is obtained, density reaches more than 0.6kg/L, and sealing is preserved;
(5) biogas fermentation: the material utilizing step (4) to obtain preservation good carries out biogas fermentation, obtains biogas.Biogas fermentation characteristic is as shown in table 3-2.Illustrate according to the data in table 3-2, adopt method provided by the invention, the generation of lag phase in biogas fermentation can be avoided, improve stalk methane yield 31.3%, and shorten fermentation period 23%, there is good economic benefit.
Table 6 embodiment 3 and traditional low moisture preserve the biogas fermentation Property comparison of material
Note: D
t80for accumulation methane quantity account for total gas production 80% time, the time spent.
Although the present invention with preferred embodiment openly as above; but it is also not used to limit the present invention, any person skilled in the art, without departing from the spirit and scope of the present invention; can do various change and modification, what therefore protection scope of the present invention should define with claims is as the criterion.
Claims (10)
1. stalk is preserved and is prepared a method for biogas, it is characterized in that, utilizes sucrose-containing wastewater to carry out lactic acid fermentation, then carried out mixing by crops straw lower to lactic fermentation liquid and moisture content and preserve, and is finally used for biogas fermentation with the material after preservation.
2. method according to claim 1, is characterized in that, step is as follows:
(1) lactic acid fermentation: utilize sucrose-containing wastewater to carry out lactic acid fermentation;
(2) crushing material: the stalk of low-water-content is pulverized;
(3) mixing of materials: utilize step (1) to obtain lactic fermentation liquid and carry out mixing and preserving with the comminuting matter that step (2) obtains, control material water ratio between 60%-65%;
(4) preservation: the material successively compacting that step (3) is obtained, density reaches more than 0.6kg/L, and sealing is preserved;
(5) biogas fermentation: the material utilizing step (4) to obtain preservation good carries out biogas fermentation, obtains biogas.
3. the method according to claims 1, is characterized in that, described agricultural crop straw is cellulosic stalk.
4. method according to claim 3, it is characterized in that, described cellulosic stalk comprises maize straw, wheat stalk and rice straw, bagasse.
5. the method according to claims 2, is characterized in that, lactic acid fermentation condition is: fermentation temperature 30 DEG C-42 DEG C, fermentation time 1 to 2 days.
6. the method according to claims 2, is characterized in that, described crushing material, is be 2-4cm by crushed stalk to particle diameter.
7. the method according to claims 2, is characterized in that, described sucrose-containing wastewater, is candied date processing waste water, sugarcane processing waste water or blackstrap.
8. the method according to claims 2, is characterized in that, described lactic acid fermentation, and bacterial classification used is lactobacillus plantarum, moral formula lactic acid bacteria or bacillus coagulans.
9. the method according to claims 2, is characterized in that, the stalk of described low-water-content, moisture is at 40%-50%.
10. method according to claim 2, it is characterized in that, concrete steps are as follows:
1) lactic acid fermentation: with candied date processing waste water, sugarcane processing waste water or blackstrap for fermentation substrate, inoculation lactobacillus plantarum, moral formula lactic acid bacteria or bacillus coagulans carry out lactic acid fermentation, lactic acid fermentation condition is: fermentation temperature 30 DEG C-42 DEG C, fermentation time 1-2 days, obtains lactic fermentation liquid after fermentation ends;
2) crushing material: be 2-3cm at crops stalk crushing to the particle diameter of 40-50% by moisture, obtains comminuting matter;
3) mixing of materials: utilize step (1) to obtain lactic fermentation liquid and carry out mixing and preserving with the comminuting matter that step (2) obtains, control material water ratio between 60%-65%;
4) preservation: the material successively compacting that step (3) is obtained, density reaches more than 0.6kg/L, and sealing is preserved;
5) biogas fermentation: the material utilizing step (4) to obtain preservation good carries out biogas fermentation, obtains biogas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201511029585.0A CN105494320A (en) | 2015-12-31 | 2015-12-31 | Method for preserving straws and preparing marsh gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511029585.0A CN105494320A (en) | 2015-12-31 | 2015-12-31 | Method for preserving straws and preparing marsh gas |
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| CN201511029585.0A Pending CN105494320A (en) | 2015-12-31 | 2015-12-31 | Method for preserving straws and preparing marsh gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106591412A (en) * | 2017-01-11 | 2017-04-26 | 刘国瑭 | Method for dry-storage hydrolytic acidification pretreatment on crop straw with organic acid |
| CN108570480A (en) * | 2017-08-28 | 2018-09-25 | 东北师范大学 | A method of utilizing bean jelly powder processing waste water ferment preparation of sludge gas |
| CN110862145A (en) * | 2019-12-03 | 2020-03-06 | 山东省农业科学院农业资源与环境研究所 | Method for acidifying milk cow manure sewage by using cucurbit vegetable straws |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012464A (en) * | 2007-01-31 | 2007-08-08 | 南京大学 | Hybrid anaerobic fermentation method for processing wood fiber raw material |
| CN101337838A (en) * | 2008-08-11 | 2009-01-07 | 鄂尔多斯市东胜区传祥垃圾处理有限责任公司 | Combined anaerobic fermentation process for organic solid wastes |
| CN102757980A (en) * | 2012-07-30 | 2012-10-31 | 深圳市海吉星环保有限责任公司 | Method for producing methane through combination of perishable organic wastes and straws |
-
2015
- 2015-12-31 CN CN201511029585.0A patent/CN105494320A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012464A (en) * | 2007-01-31 | 2007-08-08 | 南京大学 | Hybrid anaerobic fermentation method for processing wood fiber raw material |
| CN101337838A (en) * | 2008-08-11 | 2009-01-07 | 鄂尔多斯市东胜区传祥垃圾处理有限责任公司 | Combined anaerobic fermentation process for organic solid wastes |
| CN102757980A (en) * | 2012-07-30 | 2012-10-31 | 深圳市海吉星环保有限责任公司 | Method for producing methane through combination of perishable organic wastes and straws |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106591412A (en) * | 2017-01-11 | 2017-04-26 | 刘国瑭 | Method for dry-storage hydrolytic acidification pretreatment on crop straw with organic acid |
| CN108570480A (en) * | 2017-08-28 | 2018-09-25 | 东北师范大学 | A method of utilizing bean jelly powder processing waste water ferment preparation of sludge gas |
| CN108570480B (en) * | 2017-08-28 | 2021-12-03 | 东北师范大学 | Method for preparing biogas by fermenting bean jelly powder processing wastewater |
| CN110862145A (en) * | 2019-12-03 | 2020-03-06 | 山东省农业科学院农业资源与环境研究所 | Method for acidifying milk cow manure sewage by using cucurbit vegetable straws |
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