CN108070621A - A kind of method of comprehensive utilization of maize straw - Google Patents
A kind of method of comprehensive utilization of maize straw Download PDFInfo
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- CN108070621A CN108070621A CN201810039786.6A CN201810039786A CN108070621A CN 108070621 A CN108070621 A CN 108070621A CN 201810039786 A CN201810039786 A CN 201810039786A CN 108070621 A CN108070621 A CN 108070621A
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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
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/04—Polysaccharides, i.e. compounds containing more than five saccharide radicals attached to each other by glycosidic bonds
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- 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
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
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- 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
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- 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
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/04—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic
- C12P7/06—Ethanol, i.e. non-beverage
- C12P7/08—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate
- C12P7/10—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate substrate containing cellulosic material
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- 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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- 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
- C12P2203/00—Fermentation products obtained from optionally pretreated or hydrolyzed cellulosic or lignocellulosic material as the carbon source
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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
- Y02E50/10—Biofuels, e.g. bio-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
- 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
A kind of method of comprehensive utilization of maize straw, including will be mixed after corn straw smashing with acetic acid the step of being pre-processed, be made xylo-oligosaccharide the step of, be made super-activated carbon the step of, be made ethyl alcohol the step of, be made biogas the step of.In the present invention, maize straw after crushed, with technologies such as acetic acid treatments, can finally obtain the multiple products such as xylo-oligosaccharide, ethyl alcohol, super-activated carbon, biogas, have the advantages that turn waste into wealth, improve agricultural and sideline product added value, be worth further genralrlization.
Description
Technical field
The present invention relates to the development and utilization fields of biomass resource, and in particular to a kind of comprehensive utilization side of maize straw
Method.
Background technology
China is a large agricultural country, and national maize planting, the area of sugar grass can generate several hundred million tons every year up to several hundred million mu
Stalk.In recent years, stalk comprehensive utilization technology is all a kind of single technical solution, and generated the economic benefit is not high, straw
Stalk progressively evolves into useless burden from traditional agricultural raw material, and most of stalk is burned by farmer, and environment is generated
It seriously endangers.
Due to the air pollution problems inherent that crop straw burning is brought, occurred using straw directly returning to field as improvement crop straw burning
Measure, but its drawback is easily to take pest and disease damage biography in soil to；Meanwhile untreated straw directly returning to field, not by hair
Ferment processing time can influence the emergence rate of succeeding crop.
It is also a kind of stalk integrated conduct method risen in recent years that stalk, which is crushed, and is compacted into feed, fuel etc., this
Method occupies land resource too much, influences peasant's farming.Comprehensive current condition, best mode is to realize agricultural crop straw
Comprehensive utilization.
The content of the invention
In order to solve the problems in the existing technology the present invention, provides a kind of method of comprehensive utilization of maize straw, beautiful
Rice stalk after crushed, with technologies such as acetic acid treatments, can obtain multiple product, attached with turning waste into wealth, improving agricultural and sideline product
The advantages of value added.
The used to solve above-mentioned technical problem technical solution of the present invention is：A kind of comprehensive utilization side of maize straw
Method comprises the following steps：
Step 1: being pre-processed being mixed after corn straw smashing with acetic acid, mixture is made, acetic acid is with mixing maize straw
Liquid-solid ratio 12：1-20：1；
Step 2: mixture made from step 1 is filtered, filtrate and solid residue are obtained；
Step 3: the difference according to the lignin in filtrate and hemicellulose solubility in water, half is dissolved in water in filtrate
Cellulosic component, lignin component Precipitation are simultaneously filtered, and by the filtrate after filtering by low temperature concentration, make filtrate
Mass concentration reaches 60-70g/L, then adds in zytase, and through enzymolysis, xylo-oligosaccharide is obtained after low temperature crystallization；
Step 4: the activated processing of the lignin that step 3 is filtered out, obtains super-activated carbon；
Step 5: the solid residue that step 2 is obtained adds in cellulase and saccharomyces cerevisiae, ethyl alcohol is obtained after fermented；
Step 6: carrying out biogas fermentation after the wastewater collection that all steps are generated, biogas is obtained.
In the step one of the present invention, the condition of acetic acid pretreatment is：The mass percent concentration of acetic acid be 60-70%, temperature
For 70 DEG C, pretreatment time 60-90min.
In the step three of the present invention, enzymatic hydrolysis condition is：It is 6.0 to digest pH, adds in the weight and filtrate volume of zytase
Ratio for 2-4g/L, 40-60 DEG C of hydrolysis temperature, enzymolysis time 2-4h.
Wherein, lignin step 3 filtered out is 3 by alkali charcoal ratio with potassium hydroxide：1-5：1 ratio is in mixer
It is inside mixed, adds in pure water and mix and impregnate 3-20h；Then soaked mixed material is added in high-temperature activation kettle,
Lye is added in, electricity consumption stove heat is warming up to 110-130 DEG C and carries out after being dehydrated 2-3h for the first time, is warming up under the protection of nitrogen
400-440 DEG C carries out second of dehydration 2-3h, then is warming up to 700-850 DEG C with the heating rate of 5-10 DEG C/min, reacts 1-3h
Afterwards, it is cooled to room temperature under natural conditions, 6-12h is washed with deionized in eluting column, until after cleaning solution is neutrality, is done
It is dry, obtain super-activated carbon.
In the step five of the present invention, solid residue adds water, and concentration of substrate is made to add in culture medium solution and fiber for 80 g/L
Plain enzyme, cellulase dosage 35.40-36 U/g, initial pH value 4.8, temperature 50 C, 80 r/min speed of agitator under pre- enzyme
Solution；Feed supplement after 12h makes concentration of substrate reach 200g/L, and adds a certain amount of active dry yeasr, and active dry yeasr loading is
8.92-10%, adjustment pH is 5.0, is sealed after stirring evenly with preservative film, is put into shaking table and shakes, and fermentation temperature is 37 DEG C, and shaking table turns
Speed is 120r/min, fermentation ends after 84h.
In the step six of the present invention, by waste water and anaerobic sludge with 1：1 volume mixture, it is 7.0 to adjust wastewater pH, stirring
Sealing, ferments at a temperature of 30-35 DEG C after uniformly.
Wherein, before the activated processing of lignin that step 3 filters out, distilled water is used to remove residual by washing
Acetic acid, and acetic acid is evaporated recycling by recycling using negative pressure evaporation technology.
Advantageous effect：Under conditions of temperature is appropriate, catalytic water occurs rapidly the present invention for the hemi-cellulose components in stalk
Solution generates xylo-oligosaccharide soluble sugar；
In acetic acid solution, the α of lignin macromolecular, beta-aromatic ehter bond is broken rapidly, and lignin macromolecular is broken into
Lignin fragment, the dissolubility in acetic acid solution are improved, and are departed from from stalk and are entered in acetic acid solution；Utilize suction filtration
Operation can realize separation of solid and liquid, and the main component of solid residue is cellulose at this time, with clean distilled water by wash with
Remaining acetic acid on residue is removed, lignin and hemicellulose are dissolved in acetic acid filtrate at this time；According to lignin and hemicellulose
The difference of plain solubility in water, be dissolved in water hemi-cellulose components, then lignin component Precipitation, and lignin is activated
Processing, obtains super-activated carbon；
Maize straw after crushed, with technologies such as acetic acid treatments, can finally obtain xylo-oligosaccharide, ethyl alcohol, super-activated carbon, natural pond
The multiple products such as gas have the advantages that turn waste into wealth, improve agricultural and sideline product added value, are worth further genralrlization.
Specific embodiment
A kind of method of comprehensive utilization of maize straw of the present invention is described further with reference to specific embodiment, with
Those skilled in the art is allow to be better understood from the present invention and can be practiced.
A kind of method of comprehensive utilization of maize straw, comprises the following steps：
Step 1: being pre-processed being mixed after corn straw smashing with acetic acid, mixture is made, acetic acid is with mixing maize straw
Liquid-solid ratio 12：1-20：1；
Step 2: mixture made from step 1 is filtered, filtrate and solid residue are obtained；
Step 3: the difference according to the lignin in filtrate and hemicellulose solubility in water, half is dissolved in water in filtrate
Cellulosic component, lignin component Precipitation are simultaneously filtered, and by the filtrate after filtering by low temperature concentration, make filtrate
Mass concentration reaches 60-70g/L, then adds in zytase, and through enzymolysis, xylo-oligosaccharide is obtained after low temperature crystallization at≤8 DEG C；
Step 4: the activated processing of the lignin that step 3 is filtered out, obtains super-activated carbon；
Step 5: the solid residue that step 2 is obtained adds in cellulase and saccharomyces cerevisiae, ethyl alcohol is obtained after fermented；
Step 6: carrying out biogas fermentation after the wastewater collection that all steps are generated, biogas is obtained.
Wherein, in step 1, the condition of acetic acid pretreatment is：The mass percent concentration of acetic acid is 60-70%, and temperature is
70 DEG C, pretreatment time 60-90min.
Wherein, in step 3, enzymatic hydrolysis condition is：It is 6.0 to digest pH, adds in the weight of zytase and the ratio of filtrate volume
Example is 2-4g/L, 40-60 DEG C of hydrolysis temperature, enzymolysis time 2-4h.
Wherein, lignin step 3 filtered out is 3 by alkali charcoal ratio with potassium hydroxide：1-5：1 ratio is in mixer
It is inside mixed, adds in pure water and mix and impregnate 3-20h；Then soaked mixed material is added in high-temperature activation kettle,
Lye is added in, electricity consumption stove heat is warming up to 110-130 DEG C and carries out after being dehydrated 2-3h for the first time, is warming up under the protection of nitrogen
400-440 DEG C carries out second of dehydration 2-3h, then is warming up to 700-850 DEG C with the heating rate of 5-10 DEG C/min, reacts 1-3h
Afterwards, it is cooled to room temperature under natural conditions, 6-12h is washed with deionized in eluting column, until after cleaning solution is neutrality, is done
It is dry, obtain super-activated carbon.
Wherein, in step 5, solid residue adds water, and concentration of substrate is made to add in culture medium solution and cellulose for 80 g/L
Enzyme, cellulase dosage 35.40-36 U/g, initial pH value 4.8, temperature 50 C, 80 r/min speed of agitator under pre- enzyme
Solution；Feed supplement after 12h makes concentration of substrate reach 200g/L, and adds a certain amount of active dry yeasr, and active dry yeasr loading is
8.92-10%, adjustment pH is 5.0, is sealed after stirring evenly with preservative film, is put into shaking table and shakes, and fermentation temperature is 37 DEG C, and shaking table turns
Speed is 120r/min, fermentation ends after 84h.
Wherein, in step 6, by waste water and anaerobic sludge with 1：1 volume mixture, it is 7.0 to adjust wastewater pH, and stirring is equal
Sealing, ferments at a temperature of 30-35 DEG C after even.
Wherein, before the activated processing of lignin that step 3 filters out, distilled water is used to remove residue by washing
Acetic acid, and acetic acid is evaporated recycling by recycling using negative pressure evaporation technology, at this point, the lignin of original dissolved state
It will be precipitated with hemi-cellulose components.
Embodiment 1
A kind of method of comprehensive utilization of maize straw, comprises the following steps：
Step 1: being pre-processed being mixed after corn straw smashing with acetic acid, mixture is made, acetic acid is with mixing maize straw
Liquid-solid ratio 15：1；Wherein, the mass percent concentration of acetic acid is 60%, and temperature is 70 DEG C, pretreatment time 90min.
Step 2: mixture made from step 1 is filtered, filtrate and solid residue are obtained；
Step 3: the difference according to the lignin in filtrate and hemicellulose solubility in water, half is dissolved in water in filtrate
Cellulosic component, lignin component Precipitation are simultaneously filtered, and by the filtrate after filtering by low temperature concentration, make filtrate
Mass concentration reaches 70g/L, then adds in zytase, and through enzymolysis, xylo-oligosaccharide is obtained after low temperature crystallization；Wherein, item is digested
Part is：It is 6.0 to digest pH, adds in the weight of zytase and the ratio of filtrate volume as 3g/L, 50 DEG C of hydrolysis temperature, during enzymolysis
Between 4h.
With this condition, the content of reducing sugar of generation is digested as 9.5 g/L, and Soluble adhesion molecule is 26.3 g/L, is put down
Right homopolymerization is 2.77.
Embodiment 2
A kind of method of comprehensive utilization of maize straw, comprises the following steps：
Step 1: being pre-processed being mixed after corn straw smashing with acetic acid, mixture is made, acetic acid is with mixing maize straw
Liquid-solid ratio 20：1；Wherein, the mass percent concentration of acetic acid is 70%, and temperature is 70 DEG C, pretreatment time 90min.
Step 2: mixture made from step 1 is filtered, filtrate and solid residue are obtained；
Step 3: the difference according to the lignin in filtrate and hemicellulose solubility in water, half is dissolved in water in filtrate
Cellulosic component, lignin component Precipitation are simultaneously filtered, and use distilled water by washing to remove remaining acetic acid, and
Acetic acid is evaporated to recycle by recycling using negative pressure evaporation technology；The activated processing of lignin that step 3 is filtered out,
Concrete operations are：
The lignin filtered out is 4 by alkali charcoal ratio with potassium hydroxide：1-5：1 ratio is mixed in mixer, is added in pure
Water simultaneously mixes immersion 3-20h；Then soaked mixed material is added in high-temperature activation kettle, adds in lye, with electric furnace plus
Heat is warming up to 120 DEG C and carries out after being dehydrated 2-3h for the first time, and 420 DEG C are warming up under the protection of nitrogen and carries out second of dehydration 2-
3h, then 700-850 DEG C is warming up to the heating rate of 8 DEG C/min, after reacting 1-3h, it is cooled to room temperature, is drenching under natural conditions
It washes and 6-12h is washed with deionized in tower, until after cleaning solution is neutrality, it is dry, obtain super-activated carbon.
The specific surface area of super-activated carbon is 2411 m2/ g, pore volume are 1.11 cm3/ g, iodine sorption value are 2536 mg/g.
Embodiment 3
A kind of method of comprehensive utilization of maize straw, comprises the following steps：
Step 1: being pre-processed being mixed after corn straw smashing with acetic acid, mixture is made, acetic acid is with mixing maize straw
Liquid-solid ratio 12：1；Wherein, the mass percent concentration of acetic acid is 65%, and temperature is 70 DEG C, pretreatment time 80min.
Step 2: mixture made from step 1 is filtered, filtrate and solid residue are obtained；
Step 3: the solid residue that step 2 is obtained adds in cellulase and saccharomyces cerevisiae, ethyl alcohol is obtained after fermented, specifically
It operates and is：
Solid residue adds water, and concentration of substrate is made to add in culture medium solution and cellulase, cellulase dosage for 80 g/L
35.40 U/g, initial pH value 4.8, temperature 50 C, 80 r/min speed of agitator under digest in advance；Feed supplement after 12h, makes substrate
Concentration reaches 200g/L, and adds a certain amount of active dry yeasr, and active dry yeasr loading is 8.92%, and adjustment pH is 5.0, is stirred evenly
It is sealed afterwards with preservative film, is put into shaking table and shakes, fermentation temperature is 37 DEG C, and ferment knot after shaking speed 120r/min, 84h
Beam.Volume fraction of ethanol is 4.7%.
Embodiment 4
A kind of method of comprehensive utilization of maize straw, comprises the following steps：
Step 1: being pre-processed being mixed after corn straw smashing with acetic acid, mixture is made, acetic acid is with mixing maize straw
Liquid-solid ratio 14：1；Wherein, the mass percent concentration of acetic acid is 68%, and temperature is 70 DEG C, pretreatment time 85min.
Step 2: mixture made from step 1 is filtered, filtrate and solid residue are obtained；
Step 3: the solid residue that step 2 is obtained adds in cellulase and saccharomyces cerevisiae, ethyl alcohol is obtained after fermented, specifically
It operates and is：
Solid residue adds water, and concentration of substrate is made to add in culture medium solution and cellulase, cellulase dosage for 80 g/L
35.60 U/g, initial pH value 5.0, temperature 50 C, 80 r/min speed of agitator under digest in advance；Feed supplement after 12h, makes substrate
Concentration reaches 200g/L, and adds a certain amount of active dry yeasr, and active dry yeasr loading is 9.1%, and adjustment pH is 5.0, after stirring evenly
It is sealed with preservative film, is put into shaking table and shakes, fermentation temperature is 37 DEG C, fermentation ends after shaking speed 120r/min, 84h.
Wherein, in each embodiment, biogas fermentation is carried out after the wastewater collection that all steps are generated, obtains biogas, specifically
It operates and is：By waste water and anaerobic sludge with 1：1 volume mixture, it is 7.0 to adjust wastewater pH, is sealed after stirring evenly, in 30-35
It ferments at a temperature of DEG C.
Fermentation flask is done using 1000 mL wide-mouth bottles, 450 mL anaerobic sludges and 450 mL waste water are added in bottle, adjusts waste water
PH value is stirred evenly, sealed with rubber stopper to 7.0.Test temperature is medium temperature（30-35℃）.From the point of view of COD degradation effect, drop
Solution rate can reach 70%；It is analyzed from production potential, 1kg COD can about produce 0.316 m3Biogas, and methane content of bilogas is
58.18% or so.
Above example is in order to illustrate technical scheme, and the purpose is to be to enable those skilled in the art
Understand present disclosure and be practiced, but do not limited the scope of the invention with this.Every reality according to the invention
The equivalent variation or modification that matter content is made should all be covered within the scope of the present invention.
Claims (7)
1. a kind of method of comprehensive utilization of maize straw, which is characterized in that comprise the following steps：
Step 1: being pre-processed being mixed after corn straw smashing with acetic acid, mixture is made, acetic acid is with mixing maize straw
Liquid-solid ratio 12：1-20：1；
Step 2: mixture made from step 1 is filtered, filtrate and solid residue are obtained；
Step 3: the difference according to the lignin in filtrate and hemicellulose solubility in water, half is dissolved in water in filtrate
Cellulosic component, lignin component Precipitation are simultaneously filtered, and by the filtrate after filtering by low temperature concentration, make filtrate
Mass concentration reaches 60-70g/L, then adds in zytase, and through enzymolysis, xylo-oligosaccharide is obtained after low temperature crystallization；
Step 4: the activated processing of the lignin that step 3 is filtered out, obtains super-activated carbon；
Step 5: the solid residue that step 2 is obtained adds in cellulase and saccharomyces cerevisiae, ethyl alcohol is obtained after fermented；
Step 6: carrying out biogas fermentation after the wastewater collection that all steps are generated, biogas is obtained.
2. a kind of method of comprehensive utilization of maize straw according to claim 1, it is characterised in that：In step 1, acetic acid
The condition of pretreatment is：The mass percent concentration of acetic acid is 60-70%, and temperature is 70 DEG C, pretreatment time 60-90min.
3. a kind of method of comprehensive utilization of maize straw according to claim 1, it is characterised in that：In step 3, enzymolysis
Condition is：It is 6.0 to digest pH, and it is 2-4g/L, hydrolysis temperature 40-60 to add in the weight of zytase and the ratio of filtrate volume
DEG C, enzymolysis time 2-4h.
4. a kind of method of comprehensive utilization of maize straw according to claim 1, it is characterised in that：Step 3 is filtered out
Lignin and potassium hydroxide by alkali charcoal ratio be 3：1-5：1 ratio is mixed in mixer, is added in pure water and is mixed leaching
Steep 3-20h；Then soaked mixed material is added in high-temperature activation kettle, adds in lye, electricity consumption stove heat is warming up to
After 110-130 DEG C carries out dehydration 2-3h for the first time, 400-440 DEG C is warming up under the protection of nitrogen and carries out second of dehydration 2-
3h, then 700-850 DEG C is warming up to the heating rate of 5-10 DEG C/min, after reacting 1-3h, it is cooled to room temperature under natural conditions,
6-12h is washed with deionized in eluting column, until after cleaning solution is neutrality, it is dry, obtain super-activated carbon.
5. a kind of method of comprehensive utilization of maize straw according to claim 1, it is characterised in that：In step 5, solid
Residue adds water, and concentration of substrate is made to add in culture medium solution and cellulase, cellulase dosage 35.40-36 U/ for 80 g/L
G, initial pH value 4.8, temperature 50 C, 80 r/min speed of agitator under digest in advance；Feed supplement after 12h, reaches concentration of substrate
200g/L, and a certain amount of active dry yeasr is added, active dry yeasr loading is 8.92-10%, and adjustment pH is 5.0, with guarantor after stirring evenly
Fresh film sealing, is put into shaking table and shakes, and fermentation temperature is 37 DEG C, fermentation ends after shaking speed 120r/min, 84h.
6. a kind of method of comprehensive utilization of maize straw according to claim 1, it is characterised in that：It, will be useless in step 6
Water and anaerobic sludge are with 1：1 volume mixture, it is 7.0 to adjust wastewater pH, seals after stirring evenly, is issued in 30-35 DEG C of temperature
Ferment.
7. a kind of method of comprehensive utilization of maize straw according to claim 1, it is characterised in that：What step 3 filtered out
Before the activated processing of lignin, distilled water is used by washing to remove remaining acetic acid, and will using negative pressure evaporation technology
Acetic acid evaporation recycles to recycle.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110004196A (en) * | 2019-04-10 | 2019-07-12 | 南京理工大学 | Stalk-maize multiple product alcohol fuel and high-quality DDGS technique |
| CN110283863A (en) * | 2019-07-08 | 2019-09-27 | 南京林业大学 | A method of preparing fermentable sugar from softwood |
| CN111100305A (en) * | 2019-12-30 | 2020-05-05 | 上海昶法新材料有限公司 | Process method for co-producing oligosaccharide, lignin and unbleached pulp by taking residues of alcohol production through corn straw fermentation as raw materials |
| CN111232978A (en) * | 2020-03-26 | 2020-06-05 | 南京林业大学 | Method for preparing high-yield activated carbon by grouping and separating shell biomass |
| CN112359080A (en) * | 2020-11-03 | 2021-02-12 | 江苏康维生物有限公司 | Preparation method of xylo-oligosaccharide with high xylobiose and xylotriose content |
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| CN110004196A (en) * | 2019-04-10 | 2019-07-12 | 南京理工大学 | Stalk-maize multiple product alcohol fuel and high-quality DDGS technique |
| CN110004196B (en) * | 2019-04-10 | 2023-05-05 | 南京理工大学 | Process for co-producing fuel ethanol and DDGS by using straw and corn |
| CN110283863A (en) * | 2019-07-08 | 2019-09-27 | 南京林业大学 | A method of preparing fermentable sugar from softwood |
| CN111100305A (en) * | 2019-12-30 | 2020-05-05 | 上海昶法新材料有限公司 | Process method for co-producing oligosaccharide, lignin and unbleached pulp by taking residues of alcohol production through corn straw fermentation as raw materials |
| CN111232978A (en) * | 2020-03-26 | 2020-06-05 | 南京林业大学 | Method for preparing high-yield activated carbon by grouping and separating shell biomass |
| CN112359080A (en) * | 2020-11-03 | 2021-02-12 | 江苏康维生物有限公司 | Preparation method of xylo-oligosaccharide with high xylobiose and xylotriose content |
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