A method of combining baled straw and livestock and poultry manure to produce biogas

Abstract

The invention discloses a method for generating methane jointly through bundled straw and livestock and poultry manure.The method specifically includes the steps that A, after being harvested, straw is inoculated with a methane fermenting agent, the bundled straw is piled in a reactor in an overlapped mode, the livestock and poultry manure is injected, and aerobiotic placement is conducted; B, the reactor is sealed, biogas slurry inoculation is conducted, and fermentation is conducted for 30-35 days; C, the biogas slurry is injected, and fermentation is conducted for 15-20 days.The methane is generated jointly through the large-scale bundled straw and the livestock and poultry manure, the problem that cellulose raw materials cannot be directly treated in an energy conversion mode after mechanical harvesting and storage in the prior art is solved, energy consumption is reduced, cost is reduced, the volume gas generation rate of the anaerobic reactor is increased, and compared with a traditional fermentation process, the cumulative gas generation amount of the whole fermentation process is increased by 50% or above.

Description

technical field [0001] The invention relates to the technical field of renewable energy, in particular to a method for jointly producing biogas by using baled straw and livestock and poultry manure. Background technique [0002] About 700 million tons of crop straws are produced in my country every year. At present, the utilization rate of these straws is less than 50%. How to effectively use these straw resources has become a difficult problem in the control of rural pollution. In the traditional process of straw fermentation to prepare biogas, due to the high cellulose content of straw, it needs to be pulverized first. However, in the current shortage of rural labor force, mechanized harvesting and bundling of straw have become the main way to deal with straw in the field. It is of great significance to directly use baled straw as substrate to ferment biogas to solve the resource utilization of agricultural waste straw. However, the compactness of the straw after mechaniz...

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Problems solved by technology

[0002] my country produces about 700 million tons of crop straws every year. At present, the utilization rate of these straws is less than 50%. How to effectively use these straw resources has become a difficult problem in the control of rural pollution.

The Chinese patent with the application number 201310025678.0 discloses a method for producing biogas by solid-state fermentation of crop straw and livestock manure. The pretreatment of the patent is complicated, and the pretreatment process needs to be kneaded and crushed, which consumes a lot of energy and increases the operation of biogas projects. Cost, and the pretreatment process requires NaOH treatment in physical pretreatment, the pretreatment process requires a large site, consumes a lot of manpower and material resources, and the treatment process increases NaOH, the fermentation product cannot be directly used, and has an impact on the environment , which limits the industrial application of this method, and is not conducive to the large-scale utilization of crop straw and livestock and poultry manure as energy raw materials

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