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Method for preparing marsh gas by fermenting steam-exploded wood fiber straws

A technology of lignocellulosic and steam-exploded straw, which is applied in fermentation, waste fuel, etc., and can solve the problems of lignocellulosic straw inhibition

Inactive Publication Date: 2009-09-02
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of inhibition of lignocellulosic straw in the general anaerobic fermentation technology and process and provide a process for steam-exploded lignocellulosic straw fermentation to prepare biogas

Method used

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  • Method for preparing marsh gas by fermenting steam-exploded wood fiber straws

Examples

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Effect test

Embodiment 1

[0017] Spartina alterniflora was treated with steam explosion as the fermentation raw material. The steam explosion equipment was produced by Henan Hebi Zhengdao Technology Co., Ltd. The opening time of the explosion valve of this equipment was 0.00875s, the steam explosion condition was 1.5MPa, and the pressure maintenance time was 90s. The experiment was carried out by batch fermentation, using 2500mL faucet tank as the anaerobic reactor, the total weight of the material was 1500g, the TS concentration was 6%, the inoculum concentration was 45%, the fermentation period was 55d, and the experiments were performed in parallel. At the beginning of the test, fill the reactor with nitrogen for 2 minutes to drive away the air in the reactor, seal it with a rubber stopper, put it into the incubator, set the temperature in the incubator to 35°C, and collect the biogas by drainage method. Shake the reactor manually every day to stir the materials in the reactor; check the airtightness...

Embodiment 2

[0020] Corn stalks treated with steam explosion were used as fermentation raw materials. The steam explosion equipment was produced by Henan Hebi Zhengdao Technology Co., Ltd. The opening time of the explosion valve of this equipment was 0.00875s, the steam explosion condition was 2.0MPa, and the pressure maintenance time was 90s. The test was carried out by batch fermentation, using a 1000mL jar as an anaerobic reactor, with a total material weight of 500g, a TS concentration of 6%, an inoculum concentration of 45%, and a fermentation period of 60 days. Two experiments were performed in parallel. At the beginning of the test, fill the reactor with nitrogen for 2 minutes to drive away the air in the reactor, seal it with a rubber stopper, put it into the incubator, set the temperature in the incubator to 35°C, and collect the biogas by drainage method. Shake the reactor manually every day to stir the materials in the reactor; check the airtightness of the reaction device regula...

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Abstract

The invention discloses a method for preparing marsh gas by fermenting steam-explosion wood fiber straws, which comprises the following steps: cutting up the straws first and filling the same into an steam-explosion device to perform steam explosion so as to obtain powdered and threadlike steam-explosion straw materials, and putting the steam-explosion straw materials into an anaerobic biogas reactor to perform anaerobic fermentation so as to generate biogases. The content of methane in the biogas prepared by the method is higher with 65 to 75 percent. The method has multiple functions of improving the problem of the structural inhibition of the anaerobic fermentation of the wood fiber straws, obtaining clean energy source, and treats the wood fiber straw wastes in countryside simultaneously.

Description

technical field [0001] The invention belongs to the field of biogas energy preparation methods, and in particular relates to a process for producing biogas by anaerobic fermentation of lignocellulosic straw. Background technique [0002] Energy and the environment are the most important topics in the sustainable development of contemporary human society and countries around the world. The main energy used by human beings is from firewood to coal, oil and natural gas, and now the new energy includes nuclear energy, solar energy, wind energy and biomass energy. However, fossil fuels are the most used and the most important ones today. Due to the massive use of fossil fuels, a large amount of harmful substances have been produced, resulting in serious environmental pollution and ecological damage; at the same time, due to the massive exploitation of fossil energy and the rapid development of the world economy Rapid development and population growth, a substantial increase in e...

Claims

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Application Information

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IPC IPC(8): C12P5/02
CPCY02E50/343Y02E50/30
Inventor 郑正邹星星方彩霞杨世关陈广银罗兴章张继彪罗艳高顺枝伦琳王卫平
Owner NANJING UNIV
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