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Method for producing biogas from lignocellulose raw materials

A lignocellulose and biogas technology, applied in waste fuel, fermentation and other directions, can solve the problems of high cost, heavy pollution, low recovery rate, etc., achieve a wide range of non-volatile dissolution, reduce production costs, and good thermal stability Effect

Inactive Publication Date: 2018-11-23
SHANDONG LIANXING ENERGY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional methods of separating and utilizing lignocellulose are mostly reacted in acidic, alkaline or organic solvents, but these methods are difficult to dissolve lignin, and there are still problems such as heavy pollution, high cost and low recovery rate.
In addition, the technology of biochemical conversion of lignocellulosic raw materials into biogas still has problems such as relatively low efficiency, relatively long cycle, and relatively high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for producing biogas with lignocellulosic raw materials, comprising the following steps:

[0018] (1) Pulverize the wheat straw under mechanical external force;

[0019] (2) The ionic liquid 1,3-dimethylimidazolium methyl sulfate was firstly added to the crushed wheat straw, and the ionic liquid 1-ethyl-3-methyl was added after stirring for 3 minutes at a temperature of 23°C. Imidazole methyl phosphate salt, stirred at 45 ° C for 30 minutes, can dissolve 10% of cellulose, and finally added ionic liquid 1-butyl-3-methylimidazolium chloride, at 90 ° C, react for 27 minutes, filter unfiltered Dissolved filter residue;

[0020] Mass of crushed wheat straw and ionic solutions 1,3-dimethylimidazolium methyl sulfate, 1-ethyl-3-methylimidazolium methyl phosphate, 1-butyl-3-methylimidazolium chloride The percentages are both 2.4%;

[0021] (3) adding the filtrate in step (2) to the biogas reaction device, and adding anaerobic granular sludge to the generated biogas d...

Embodiment 2

[0023] A method for producing biogas with lignocellulosic raw materials, comprising the following steps:

[0024] (1) pulverizing the bagasse under mechanical external force;

[0025] (2) First add ionic liquid 1,3-dimethylimidazolium methyl sulfate to the pulverized bagasse, and then add ionic liquid 1-ethyl-3-methyl sulfate after stirring for 4 min at a temperature of 25°C Imidazole methyl phosphate salt, stirred at 45 ° C for 30 minutes, can dissolve 10% of cellulose, and finally added ionic liquid 1-butyl-3-methylimidazolium chloride, at 90 ° C, react for 25 minutes, filter untreated Dissolved filter residue;

[0026] Mass of crushed wheat straw and ionic solutions 1,3-dimethylimidazolium methyl sulfate, 1-ethyl-3-methylimidazolium methyl phosphate, 1-butyl-3-methylimidazolium chloride The percentages are both 2.6%;

[0027] (3) adding the filtrate in step (2) to the biogas reaction device, and adding anaerobic granular sludge to the generated biogas device, the ratio o...

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PUM

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Abstract

The invention relates to the technical field of production of biogas, in particular to a method for producing biogas from lignocellulose raw materials. The method comprises the following steps: (1) crushing the lignocellulose raw materials; (2) adding ionic liquid 1, 3-dimethylimidazolium methyl sulfate, 1-ethyl-3-methylimidazole methyl phosphate and 1-butyl-3-methylimidazolium chlorine salt intothe crushed lignocellulosic raw materials, and filtering undissolved filter residues; (3) adding filtrate obtained in the step (2) into a biogas reaction device, adding anaerobic granular sludge intothe biogas reaction device, wherein the ratio of the anaerobic granular activated sludge to the filtrate is equal to 3 to 7, maintaining the temperature in the biogas reaction device to be 10-16 DEG C, and carrying out a reaction for 4-12h. The method provided by the invention has the beneficial effects that the dissolution rate of lignocellulose and components thereof in the ionic liquid is relatively high, so that the utilization rate of the lignocellulosic resources is increased, and the production cost of biomass energy is reduced.

Description

technical field [0001] The invention relates to the technical field of biogas production, in particular to a method for producing biogas from lignocellulose raw materials. Background technique [0002] Lignocellulose is an extremely abundant renewable resource on the earth. The raw materials of lignocellulose include wood (such as poplar, eucalyptus, pine, etc.), forest processing waste and agricultural straw waste (such as corn stalk, wheat stalk, rice Biomass energy production from lignocellulose as raw material through dissolution, fractionation, saccharification, fermentation and other processes has been a research hotspot in recent years due to its wide source, wide application and easy collection. Converting them into energy through microbial chemistry is of great significance for alleviating the pressure brought by the global energy crisis and solving the problem of environmental pollution. The cellulose content of lignocellulose raw materials is about 30%-50%, the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCC12P5/023C12P2203/00Y02E50/30
Inventor 张成如
Owner SHANDONG LIANXING ENERGY GRP CO LTD