Technology method for high-efficiency anaerobic fermentation production of biogas by lignocellulose-rich materials

A technology of lignocellulose and anaerobic fermentation, which is applied in the field of high-efficiency anaerobic fermentation of lignocellulose-rich materials to produce biogas, can solve the problems of low gas production efficiency, high concentration of backflow biogas slurry, low treatment efficiency, etc. Consumption, improve the level of automation, improve the effect of efficiency

Inactive Publication Date: 2018-11-23
河北京安瑞能环境科技有限公司
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Problems solved by technology

[0005] The present invention proposes a process method for efficient anaerobic fermentation of lignocellulose-rich materials to produce biogas, which solves the problems of low pretreatment efficiency of lignocellulose-rich materials, high concentration of recirculated biogas slurry, and low gas production efficiency in the prior art question

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  • Technology method for high-efficiency anaerobic fermentation production of biogas by lignocellulose-rich materials
  • Technology method for high-efficiency anaerobic fermentation production of biogas by lignocellulose-rich materials

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Embodiment 1

[0034] A process method for producing biogas by efficient anaerobic fermentation of lignocellulose-rich materials, comprising the following steps:

[0035] S1. Material beating: mix the roughly broken straw with the returning biogas slurry, and beat it into a slurry in a liquid environment through a beating system. The beating system is installed online with a power of 2kw / m 3 , processing capacity 20 tons per hour, power 15kw, intermittent operation, pulping for 10 minutes after incoming materials;

[0036] S2. Biological treatment: Send the slurry prepared in step S1 to the hydrolysis tank, and add cellulolytic enzyme at the same time to obtain a mixed slurry. The capacity of the cellulolytic enzyme tank is 1kg / 60m 3 ;

[0037] S3. Facultative hydrolysis acid production: In the hydrolysis tank, intermittently aerate, hydrolyze and produce acid, and obtain the pre-treated material. The pH of the hydrolysis tank is 5.6, the temperature is 28°C, and the aeration is 20 minutes ...

Embodiment 2

[0045] A process method for producing biogas by efficient anaerobic fermentation of lignocellulose-rich materials, comprising the following steps:

[0046] S1. Material beating: mix the roughly broken straw with the returning biogas slurry, and beat it into a slurry in a liquid environment through a beating system. The beating system is installed online with a power of 2kw / m 3 , processing capacity of 20 tons per hour, power of 15kw, intermittent operation, pulping for 10 minutes after incoming materials.

[0047] S2. Biological treatment: Send the slurry prepared in step S1 to the hydrolysis tank, and add cellulolytic enzyme at the same time to obtain a mixed slurry. The capacity of the cellulolytic enzyme tank is 1kg / 60m 3 . ;

[0048] S3. Facultative hydrolysis acid production: in the hydrolysis tank, intermittent aeration, hydrolysis and acid production, to obtain pre-treated materials, the pH of the hydrolysis tank is 6.3, the temperature is 33 ° C, aeration is 30 minut...

Embodiment 3

[0056] A process method for producing biogas by efficient anaerobic fermentation of lignocellulose-rich materials, comprising the following steps:

[0057] S1. Material beating: mix the roughly broken straw with the returning biogas slurry, and beat it into a slurry in a liquid environment through a beating system. The beating system is installed online with a power of 2kw / m 3 , processing capacity 20 tons per hour, power 15kw, intermittent operation, pulping for 10 minutes after incoming materials;

[0058] S2. Biological treatment: Send the slurry prepared in step S1 to the hydrolysis tank, and add cellulolytic enzyme at the same time to obtain a mixed slurry. The capacity of the cellulolytic enzyme tank is 1kg / 60m 3 ;

[0059] S3. In the hydrolysis tank, aerate intermittently to produce acid by hydrolysis to obtain pre-treated materials. The pH of the hydrolysis tank is 7, the temperature is 38°C, and the aeration is performed for 40 minutes per hour. Aerated and non-aerat...

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Abstract

The invention belongs to the technical field of a biogas preparation method, and provides a technology method for high-efficiency anaerobic fermentation production of biogas by lignocellulose-rich materials. The technology method comprises the following steps of material pulping, biological treatment, facultative hydrolyzing and acid production, anaerobic fermenting, solid and liquid separating, refluxing and the like. The technology method solves the problems of low pretreatment efficiency of the lignocellulose-rich materials, overhigh concentration of reflux biogas, and low biogas productionefficiency in the prior art.

Description

technical field [0001] The invention belongs to the technical field of biogas preparation methods, and relates to a process method for producing biogas by efficient anaerobic fermentation of lignocellulose-rich materials. Background technique [0002] The straw material belongs to the structure of lignocellulosic hemicellulose. The process of anaerobic fermentation to produce biogas is mainly that cellulose and hemicellulose are degraded by long-chain glucose polymers into small molecular alcohols and acids, and then undergo anaerobic fermentation. Due to the presence of benzene rings in lignin, it is difficult to degrade through anaerobic fermentation. After pretreatment, the structure of cellulose and hemicellulose wrapped by lignin is broken, and the glucose polymer can be degraded into small molecule volatile fatty acids, which is the rate-limiting step of straw anaerobic fermentation. [0003] At present, the pretreatment methods of straw materials include biological m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C12M1/107C12M1/02C12M1/00B01D36/00
CPCB01D36/00C12M23/04C12M23/36C12M27/02C12P5/023C12P2203/00Y02E50/30
Inventor 顾久君魏永周思宇
Owner 河北京安瑞能环境科技有限公司
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