CN105087660B - A kind of closed cycle production method of straw ethanol-methane coproduction - Google Patents
A kind of closed cycle production method of straw ethanol-methane coproduction Download PDFInfo
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- CN105087660B CN105087660B CN201510572180.5A CN201510572180A CN105087660B CN 105087660 B CN105087660 B CN 105087660B CN 201510572180 A CN201510572180 A CN 201510572180A CN 105087660 B CN105087660 B CN 105087660B
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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
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Abstract
The present invention relates to a kind of straw ethanol-methane coproduction closed cycle production methods, under the conditions of related method includes: 150-200 DEG C of (1), 0.02MPa-2.5MPa, stalk, which handles to be separated by solid-liquid separation after suitable time in water, obtains residue and treatment fluid；(2) ethyl alcohol is prepared using step (1) residue obtained fermentation, distillation；(3) methane is prepared using the mixed liquor fermentation of slops obtained by treatment fluid obtained by step (1) and step (2)；(4) waste liquid after methane fermentation be separated by solid-liquid separation obtained by liquid water used when handling stalk as step (1), repeat step (1) to (4).Production method of the invention is the closed circulating method of overall process waste liquid, and non-wastewater discharge is free from environmental pollution.And ethyl alcohol final concentration can reach 4.3% (v/v).
Description
Technical field
The present invention relates to bioenergies and waste resource utilization technology field, and in particular to stalk fuel ethyl alcohol and first
The coupling production of alkane and the closed circulation process of waste liquid.
Background technique
With the rapid development of social economy, energy demand constantly increases, petroleum, the coal of the development of support modern industrial society
Charcoal and natural gas etc. are disposable, non-renewable energy resources are increasingly exhausted.In addition, the use of the disposable energy brings serious environment dirty
Dye, is one of roots of global environmental problems such as global warming.Therefore, reproducible clean energy resource is increasingly by various countries' weight
Depending on wherein biomass energy is one of the renewable sources of energy that various countries first develop.Biomass energy is mainly to discard agricultural-forestry biomass
It is raw material with organic domestic waste, the technological means such as integrated application physics, chemistry, biology are translated into solid and liquid combustion
Material or other chemicals.Liquid fuel mainly includes alcohol fuel and biodiesel.
Biomass is that the main process that raw material produces alcohol fuel includes: that biomass material pre-processes, enzymatic hydrolysis, ferments and steam
It evaporates.Preconditioning technique has acid system, alkaline process, steam blasting, subcritical water law etc., wherein subcritical water law does not add soda acid, it is ring
The preprocess method of border close friend.The netted knot being made up of pretreatment, hemicellulose in biomass raw material, cellulose and lignin
Structure is destroyed, and is conducive to subsequent enzymatic hydrolysis and fermentation process.But because being only capable of utilizing glucose for the saccharomycete of industrial alcohol fermentation
Equal hexoses, main composition are that the hemicellulose of pentose is not used effectively.In addition, pretreatment, enzymatic hydrolysis and ethanol distillation etc.
A large amount of waste liquids are generated in the process, are polluted the environment.
Summary of the invention
For the defects or inadequacies for existing technologies, the present invention provides a kind of ethyl alcohol-methane closed cycle co-productions.With
Solve the problems, such as contaminated wastewater during biomass material fuel ethanol production
Ethyl alcohol provided by the invention-methane closed cycle co-production includes:
(1) 150-200 DEG C, under the conditions of 0.02MPa-2.5MPa, stalk handles solid-liquid point after suitable time in water
From obtaining residue and treatment fluid；
(2) ethyl alcohol is prepared using step (1) residue obtained fermentation, distillation；
(3) methane is prepared using the mixed liquor fermentation of slops obtained by treatment fluid obtained by step (1) and step (2)；
(4) waste liquid after methane fermentation be separated by solid-liquid separation obtained by liquid water used, weight when handling stalk as step (1)
Multiple step (1) to (4).
Optionally, every 10g-10kg stalk adds 400mL-400L water in step (1), handles time 1s-15min.
Optionally, cellulase is added in step (2) in residue and yeast carries out synchronous glycosylation and alcohol fermentation, cellulose
Enzyme additive amount 5FPU-30FPU/g residue, yeast-inoculated amount accounts for fermentation liquid 3%-12% (v/v), after 48-96h ferments, distillation
Obtain ethyl alcohol.
Optionally, it is added in the mixed liquor of step (3) slops obtained by step (1) obtained aqueous solution and step (2)
Anaerobic sludge particle carries out methane fermentation, and anaerobic sludge granular mass accounts for the 1%-20% of mixed liquor quality, fermentation time 12-
72h。
Compared with prior art, the invention has the advantages that
1, production method of the invention is the closed circulating method of overall process waste liquid, and non-wastewater discharge is free from environmental pollution.
2, ethyl alcohol final concentration can reach 4.3% (v/v)；
3, water resource is saved, can obviously reduce biomass fuel ethyl alcohol production cost, it is easy to accomplish industrialized production.
Detailed description of the invention
Fig. 1 is residue yield schematic diagram in 20 cyclic processes of embodiment 1；
Fig. 2 is methane production schematic diagram in 20 cyclic processes of embodiment 1；
Fig. 3 is concentration of alcohol schematic diagram in 20 cyclic processes of embodiment 1.
Specific embodiment
Co-production of the invention uses subcritical water preprocessing biomass, and insoluble portion carries out digesting-alcohol fermentation-steaming
Process is evaporated, slops merges with water soluble portion after pretreatment carries out methane fermentation, and the clear liquid after the completion of methane fermentation is used again
Subcritical water preprocessing biomass process in front end, to realize the closed circulation of overall process and the zero-emission of waste water.
It is the specific embodiment that inventor provides below, to be further explained explanation to technical solution of the present invention.
Embodiment 1:
(1) subcritical water pre-processes:
Sample after taking 10g to dry is placed in reaction kettle, adds distilled water 400mL, and 140 DEG C of temperature (0.05MPa) are arranged and turn
Speed is 300 turns/min, handles 3min, filters, obtains residue and treatment fluid；
(2) alcohol fermentation and distillation:
2g residue is taken, adds buffer 11mL, inorganic salts, the 8% yeast-alcohol fermentation of enzyme and buffer carries out after 72h
Distillation obtains ethyl alcohol；
(3) methane fermentation:
Treatment fluid in step (1) is merged with the slops of step (2), anaerobic sludge particle is added by 10%, it is quiet
It is placed in 35 DEG C of constant-temperature tables.
(4) treatment fluid recycles:
It after methane fermentation, is separated by solid-liquid separation, gained clear liquid is back to the subcritical water pretreatment of biomass, repeats above-mentioned
(1)-(5) step, recycles 20 batches, and the changing rule of residue yield, methane production and concentration of alcohol is as shown in Figs. 1-3.
Claims (1)
1. a kind of straw ethanol-methane coproduction closed cycle production method, which is characterized in that method includes:
(1) subcritical water pre-processes:
Sample after taking 10g to dry is placed in reaction kettle, adds distilled water 400mL, 300 turns 140 DEG C, 0.05MPa and revolving speed/min
Under the conditions of handle 3min, filter, obtain residue and treatment fluid；
(2) alcohol fermentation and distillation:
Take 2g residue, add buffer 11mL, inorganic salts, enzyme, buffer, 8% yeast starter liquid, alcohol fermentation is carried out, after 72h
It carries out distillation and obtains ethyl alcohol；
(3) methane fermentation:
Treatment fluid in step (1) is merged with the slops of step (2), anaerobic sludge particle is added by 10%, is statically placed in
In 35 DEG C of constant-temperature tables；
(4) treatment fluid recycles:
It after methane fermentation, is separated by solid-liquid separation, gained clear liquid is back to the subcritical water pretreatment of biomass, repeats above-mentioned (1)-
(5) step recycles 20 batches.
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| CN105779506B (en) * | 2016-05-23 | 2020-07-03 | 农业部沼气科学研究所 | Method for co-producing methane and ethanol |
| CN114290468B (en) * | 2022-01-14 | 2022-11-15 | 浙江省林业科学研究院 | Glue-free fiber board raw material and preparation method thereof and glue-free fiber board |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101748156A (en) * | 2009-12-25 | 2010-06-23 | 陈福库 | Comprehensive utilization method of soybean straws for producing fuel ethanol, lignin and marsh gas |
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| US7807419B2 (en) * | 2007-08-22 | 2010-10-05 | E. I. Du Pont De Nemours And Company | Process for concentrated biomass saccharification |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101748156A (en) * | 2009-12-25 | 2010-06-23 | 陈福库 | Comprehensive utilization method of soybean straws for producing fuel ethanol, lignin and marsh gas |
Non-Patent Citations (1)
| Title |
|---|
| 小麦和玉米秸秆的亚临界水预处理条件优化及其生产燃料乙醇的研究;贾逾泽等;《西北农林科技大学学报（自然科学版）》;20131231;第41卷(第12期);摘要，第180页左栏第4段以及1.2.2，表1 |
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