Method for efficiently producing marsh gas by performing moderate-temperature anaerobic dry fermentation on agricultural waste

A technology of agricultural waste and thermo-anaerobic drying is applied in the field of high-efficiency biogas production by mid-temperature anaerobic dry fermentation of agricultural waste, which can solve problems such as excessive acidification, increase gas production rate, improve system buffer performance, and practice energy saving and emission reduction. The effect of meaning and value
CN104357487AInactive Publication Date: 2015-02-18CHINA AGRI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA AGRI UNIV
Publication Date
2015-02-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for efficiently producing marsh gas by performing moderate-temperature anaerobic dry fermentation on agricultural waste, which comprises the following steps: uniformly mixing livestock / poultry manure, crop straw and vegetable waste to obtain a mixture, adding an inoculum into the mixture, and carrying out moderate-temperature anaerobic dry fermentation to obtain the marsh gas, wherein the dry matter mass ratio of the sum of the livestock / poultry manure and vegetable waste to the crop straw is (0.3-0.4):1, and the dry matter mass ratio of the livestock / poultry manure to the vegetable waste is (0.1-0.3):(0.1-0.2). The method solves the problems of long fermentation time, low gas production rate, high acidification tendency and the like in the independent anaerobic fermentation of the material, greatly enhances the buffer property of the system, reduces the inhibiting effect due to overhigh concentration of the ammonia nitrogen or other inhibitors, widens the selection range of the fermentation raw materials, increases the treatment power on the organic solid waste, reduces the discharge of the agricultural waste, saves the resources and protects the environment.
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Description

technical field

[0001] The invention relates to the field of fermentation, in particular to a method for producing biogas with high-efficiency mesothermal anaerobic dry fermentation of agricultural waste. Background technique

[0002] my country is a large agricultural country, which produces more than 4 billion tons of agricultural solid waste every year, including more than 3 billion tons of livestock and poultry manure, about 700 million tons of crop straw, and 100 to 150 million tons of vegetable waste. These wastes are not only serious pollution sources but also valuable biomass energy. Nowadays, most of them are randomly incinerated, discarded or directly discharged into the environment, causing environmental pollution and waste of resources. How to effectively deal with agricultural waste has become a major environmental problem that must be faced at home and abroad.

[0003] At present, the relatively mature agricultural waste treatment technologies at home and abr...

Claims

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