CN105087660A - Closed-loop circulating production method for co-production of straw ethanol and methane - Google Patents
Closed-loop circulating production method for co-production of straw ethanol and methane Download PDFInfo
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- CN105087660A CN105087660A CN201510572180.5A CN201510572180A CN105087660A CN 105087660 A CN105087660 A CN 105087660A CN 201510572180 A CN201510572180 A CN 201510572180A CN 105087660 A CN105087660 A CN 105087660A
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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 invention relates to a closed-loop circulating production method for co-production of straw ethanol and methane. The related method comprises the following steps: (1) carrying out treatment on a straw raw material in water for an appropriate time under the following conditions: 150-200 DEG C and 0.02-2.5MPa, and conducting solid-liquid separation so as to obtain residue and treating fluid; (2) preparing ethanol by fermenting and distilling the residue obtained in the step (1); (3) preparing methane by fermenting a mixed liquid of the treating fluid obtained in the step (1) and distillation waste liquid obtained in the step (2); and (4) taking liquid obtained through performing solid-liquid separation on waste liquid generated after methane fermentation as water for treating straw in the step (1), and repeating the steps (1)-(4). The production method disclosed by the invention, as a full-process waste liquid totally closed circulating method, is free from emission of waste water and is free from environmental pollution. Final concentration of the ethanol can reach 4.3% (v/v).
Description
Technical field
The present invention relates to bioenergy and utilization of waste as resource technical field, be specifically related to the coupling production of stalk fuel ethanol and methane and the closed circulation process of waste liquid.
Background technology
Along with socioeconomic fast development, energy demand constantly increases, and oil, coal and Sweet natural gas etc. that support modern industrial society develops are disposable, Nonrenewable energy resources are day by day exhausted.In addition, the use of the disposable energy brings serious environmental pollution, is one of root of the global environmental problems such as Global warming.Therefore, reproducible clean energy is day by day by various countries are paid attention to, and wherein biomass energy is one of various countries' renewable energy resources of first developing.Biomass energy mainly with discarded agricultural-forestry biomass and organic domestic waste for raw material, the technique means such as integrated application physics, chemistry, biology, are translated into solid and liquid fuel or other chemical.Liquid fuel mainly comprises alcohol fuel and biofuel.
Biomass are that the main process of raw material production alcohol fuel comprises: biomass material pre-treatment, enzymolysis, fermentation and distillation.Preconditioning technique has acid system, alkaline process, steam explosion, subcritical water law etc., and wherein subcritical water law does not add soda acid, is eco-friendly pretreatment process.By pre-treatment, the reticulated structure that hemicellulose in biomass raw material, Mierocrystalline cellulose and xylogen are formed is destroyed, and is beneficial to follow-up enzymolysis and fermenting process.But because the yeast being used for industrial alcohol fermentation only can utilize the hexoses such as glucose, main composition composition is that the hemicellulose of pentose is not used effectively.In addition, a large amount of waste liquid is produced, to environment in the processes such as pre-treatment, enzymolysis and ethanol distillation.
Summary of the invention
For defect or the deficiency of prior art, the invention provides a kind of ethanol-methane closed cycle co-production.To solve the problem of contaminated wastewater in biomass material fuel ethanol production process
Ethanol provided by the invention-methane closed cycle co-production comprises:
(1) 150-200 DEG C, under 0.02MPa-2.5MPa condition, after stalk processes suitable time in water, solid-liquid separation obtains residue and treatment solution;
(2) utilize step (1) residue obtained fermentation, distill and prepare ethanol;
(3) utilize the mixed solution fermentation of step (1) gained treatment solution and step (2) gained slops for methane;
(4) waste liquid after methane fermentation carries out solid-liquid separation gained liquid as water used during step (1) Treating straw, and repeating step (1) is to (4).
Optionally, in step (1), every 10g-10kg stalk adds 400mL-400L water, treatment time 1s-15min.
Optionally, step (2) in residue, add cellulase and yeast carries out synchronous glycosylation and ethanol fermentation, cellulase addition 5FPU-30FPU/g residue, and yeast-inoculated amount accounts for fermented liquid 3%-12% (v/v), after 48-96h fermentation, distillation obtains ethanol.
Optionally, step (3) adds anaerobic sludge particle and carries out methane fermentation in the mixed solution of step (1) obtained aqueous solution and step (2) gained slops, anaerobic sludge granular mass accounts for the 1%-20% of mixed solution quality, fermentation time 12-72h.
Compared with prior art, advantage of the present invention is:
1, production method of the present invention is the closed circulating method of whole process waste liquid, and non-wastewater discharge is free from environmental pollution.
2, ethanol final concentration can reach 4.3% (v/v);
3, saving water resource, obviously can reduce biomass fuel alcohol production cost, be easy to realize suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is residue yield schematic diagram in 20 working cyclees of embodiment 1;
Fig. 2 is methane production schematic diagram in 20 working cyclees of embodiment 1;
Fig. 3 is alcohol concn schematic diagram in 20 working cyclees of embodiment 1.
Embodiment
Co-production of the present invention adopts subcritical water preprocessing biomass, soluble portion carries out enzymolysis-ethanol fermentation-still-process, after slops and pre-treatment, water soluble portion merges and carries out methane fermentation, clear liquid after methane fermentation completes again for the subcritical water preprocessing biomass process of front end, thus realizes the closed circulation of whole process and the zero release of waste water.
Below the specific embodiment that contriver provides, to be further explained explanation to technical scheme of the present invention.
Embodiment 1:
(1) subcritical water pre-treatment:
The sample got after 10g oven dry is placed in reactor, adding distil water 400mL, and set temperature 140 DEG C of (0.05MPa) rotating speeds are 300 turns/min, process 3min, and suction filtration, obtains residue and treatment solution;
(2) ethanol fermentation and distillation:
Get 2g residue, with damping fluid 11mL, inorganic salt, enzyme and damping fluid 8% yeast-alcohol fermentation, carry out distillation acquisition ethanol after 72h;
(3) methane fermentation:
The slops of the treatment solution in step (1) and step (2) is merged, adds anaerobic sludge particle by 10%, be statically placed in 35 DEG C of constant-temperature tables.
(4) treatment solution recycle:
After methane fermentation, carry out solid-liquid separation, gained clear liquid is back to the subcritical water pre-treatment of biomass, repeats above-mentioned (1)-(5) step, circulate 20 batches, the Changing Pattern of residue yield, methane production and alcohol concn as Figure 1-3.
Claims (4)
1. a closed cycle production method for straw ethanol-methane coproduction, it is characterized in that, method comprises:
(1) 150-200 DEG C, under 0.02MPa-2.5MPa condition, after stalk processes suitable time in water, solid-liquid separation obtains residue and treatment solution;
(2) utilize step (1) residue obtained fermentation, distill and prepare ethanol;
(3) utilize the mixed solution fermentation of step (1) gained treatment solution and step (2) gained slops for methane;
(4) waste liquid after methane fermentation carries out solid-liquid separation gained liquid as water used during step (1) Treating straw, and repeating step (1) is to (4).
2. the closed cycle production method of straw ethanol-methane coproduction as claimed in claim 1, it is characterized in that, in step (1), every 10g-10kg stalk adds 400mL-400L water, treatment time 1s-15min.
3. the closed cycle production method of straw ethanol-methane coproduction as claimed in claim 1, it is characterized in that, step (2) in residue, add cellulase and yeast carries out synchronous glycosylation and ethanol fermentation, cellulase addition 5FPU-30FPU/g residue, yeast-inoculated volume accounts for the 3%-12% of fermentating liquid volume, after 48-96h fermentation, distillation obtains ethanol.
4. the closed cycle production method of straw ethanol-methane coproduction as claimed in claim 1, it is characterized in that, step (3) adds anaerobic sludge particle and carries out methane fermentation in the mixed solution of step (1) obtained aqueous solution and step (2) gained slops, anaerobic sludge granular mass accounts for the 1%-20% of mixed solution quality, fermentation time 12-72h.
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| CN105087660B CN105087660B (en) | 2019-03-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779506A (en) * | 2016-05-23 | 2016-07-20 | 农业部沼气科学研究所 | Method for coproducing methane and ethanol |
| CN114290468A (en) * | 2022-01-14 | 2022-04-08 | 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 (2)
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| US20090053777A1 (en) * | 2007-08-22 | 2009-02-26 | Susan Marie Hennessey | Process For Concentrated Biomass Saccharification |
| 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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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090053777A1 (en) * | 2007-08-22 | 2009-02-26 | Susan Marie Hennessey | Process For Concentrated Biomass Saccharification |
| 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 |
|---|
| 贾逾泽等: "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", 《西北农林科技大学学报（自然科学版）》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779506A (en) * | 2016-05-23 | 2016-07-20 | 农业部沼气科学研究所 | Method for coproducing methane and ethanol |
| 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 |
| CN114290468A (en) * | 2022-01-14 | 2022-04-08 | 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 |
| 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 |
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| CN105087660B (en) | 2019-03-22 |
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