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Biogas slurry pretreatment method of lignocellulosic biomass and method for producing biogas

A technology of lignocellulose and biomass, which is applied in the field of efficient resource utilization of organic solid waste, can solve the problems that biogas slurry cannot be fully utilized, high pretreatment cost, poor operability, etc., and solve the difficulty of comprehensive utilization of straw. , The method is simple, the effect of reducing the content

Pending Publication Date: 2020-05-19
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a biogas slurry pretreatment of lignocellulosic biomass with cheap operability and large-scale application and a method for producing biogas; Poor performance, biogas slurry cannot be fully utilized, causing secondary environmental pollution and other problems

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  • Biogas slurry pretreatment method of lignocellulosic biomass and method for producing biogas
  • Biogas slurry pretreatment method of lignocellulosic biomass and method for producing biogas

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specific Embodiment approach 1

[0024] Specific embodiment one: the biogas slurry pretreatment method of a kind of lignocellulosic biomass in the present embodiment is carried out according to the following steps:

[0025] Step a, drying the corn stalks at 60°C, pulverizing them, and passing them through a 40-mesh sieve;

[0026] Step b, using the biogas slurry produced by anaerobic fermentation as a pretreatment bacterial agent; then adding the rice straw treated in step a according to the ratio of solid-to-liquid ratio of 5:100, 10:100, and 20:100, at room temperature (20 ~ Under the condition of 30° C., the rapid stirring treatment was carried out at a speed of 300 r / min for 2 minutes, and the treatment was left standing still for 24 hours.

[0027] The method for lignocellulosic biomass biogas conversion in the present embodiment is carried out according to the following steps:

[0028] Use the lignocellulosic biomass treated by the above-mentioned biogas slurry pretreatment method as the substrate, the...

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Abstract

The invention discloses a biogas slurry pretreatment method of lignocellulosic biomass and a method for producing biogas, and belongs to the field of efficient resource utilization of organic solid waste. The methods solves the problems that pretreatment costs are high and operability is poor in a current straw pretreatment process, and current biogas project biogas slurry cannot be fully utilizedto cause secondary environmental pollution. The pretreatment method provided by the invention comprises the following steps: step a, drying and crushing the lignocellulosic biomass; and step b, uniformly mixing biogas slurry obtained by anaerobic fermentation and water, adding the lignocellulosic biomass processed in the step a, performing uniform mixing under rapid mechanical stirring at room temperature, and allowing the mixture to stand for 24 h at room temperature to complete the pretreatment. The biogas slurry pretreatment method provided by the invention is used to pretreat the lignocellulosic biomass (straw and the like), the biodegradability of the lignocellulosic biomass can be improved, the lignin content of the lignocellulosic biomass can be reduced, and the lignocellulosic biomass can be converted into the biogas by using anaerobic fermentation.

Description

technical field [0001] The invention relates to biogas slurry pretreatment of lignocellulosic biomass and a method for producing biogas, belonging to the field of efficient resource utilization of organic solid waste. Background technique [0002] With the development of the current world economy, energy and environmental issues are becoming more and more prominent. In order to reduce the excessive dependence on fossil energy and rationally build the world's energy structure, clean and renewable energy has become a research hotspot in all countries in the world, and is considered to be the key to the development of the future energy economy. final direction. Lignocellulose is the most abundant and cheapest renewable resource in the world. Plant cellulose accounts for the majority of the nearly 200 billion tons of plant biomass formed by photosynthesis on the earth every year, of which 89% has not been utilized by people. As a kind of important biomass resources, the annual ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCC12P5/023C12P2201/00C12P2203/00Y02E50/30
Inventor 董丽丽曹广丽任南琪
Owner HARBIN INST OF TECH
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