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Method for low-temperature fermentation of biogas from agricultural waste

A low-temperature fermentation technology for agricultural waste, applied in the field of biogas fermentation, can solve problems such as immature biogas slurry utilization technology, large seasonal impact, and environmental pollution, so as to alleviate environmental pollution pressure, increase gas production rate, and solve gas production rate low effect

Inactive Publication Date: 2016-07-27
付顺林
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for using agricultural waste to ferment biogas at low temperature, using straw materials, weed litter, rice husk, sawdust, fruit and vegetable waste and fecal waste to mix and ferment biogas to realize energy and material circulation The method used aims to solve the problem that large-scale livestock and poultry breeding and crop straw are no longer mainly used as domestic fuel, which has become the main source of environmental pollution in rural areas of my country. Exploitation of immature technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Preparation of methanogen inoculum: (1) Collect anaerobic activated sludge containing methanogens at the bottom of the sewage channel, inoculate the sludge into the culture medium, stir for 30 minutes, seal with plastic film, and keep the temperature at 25-30℃ Next, enrich and cultivate for 8 days;

[0020] The volume ratio of the anaerobic sludge to the culture medium is 1:3-6;

[0021] The composition of the culture medium is as follows: the apple or pear is chopped and pulped to form a culture medium with potato residue, and the mixing ratio is 5:1;

[0022] (2) The enriched and cultured sludge is subjected to low-temperature acclimation and cultivation of methanogens: The liquid medium for the screening of methanogens is composed of 1.35% sodium acetate, 0.38% sodium chloride, 0.12% potassium dihydrogen phosphate, and 0.05% by weight. % Ammonium chloride, 1.85% ammonium carbonate, 1.14% ethanol, and the remainder of water are prepared into a liquid culture medium, sterili...

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Abstract

The invention specifically relates to a method for low-temperature fermentation of biogas from agricultural waste, which belongs to the technical field of biogas fermentation. The method provided by the invention employs straw materials, weeds, dry branches, fallen leaves, rice husk, wood chip, fruit and vegetable waste and excrement and urine waste for mixed fermentation of biogas, so cyclic utilization of energy and materials is realized. The objective of the invention is to overcome the problems that large-scale livestock and poultry culture and crop straw which is no longer used as major household fuel become main sources of rural environmental pollution, that production of biogas through anaerobic fermentation of manure of livestock and poultry in the prior art is greatly influenced by seasons and that traditional biogas slurry utilization technology is not mature enough.

Description

Technical field [0001] The invention relates to the technical field of biogas fermentation, in particular to a method for low-temperature fermentation of biogas using agricultural waste. Background technique [0002] As an alternative energy source, biomass biogas fermentation technology has been applied for decades. With the development of industry and agriculture, the treatment of various organic wastes has become a social issue. Poor treatment will cause environmental pollution and waste of resources; good treatment will have significant social benefits, and will also save costs for companies that produce organic waste and bring considerable economic benefits. [0003] my country produces billions of tons of various biodegradable organic wastes each year, mainly including straws, manure waste from intensive farms, agricultural and forestry product processing waste, and fruit and vegetable waste. These organic wastes produce biogas in an anaerobic environment and are partially c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04
CPCY02E50/30
Inventor 付顺林
Owner 付顺林
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