Resource utilization method of agricultural organic waste

Abstract

The invention discloses a resource utilization method of agricultural organic waste. The method comprises the steps that iron oxide is added into the agricultural organic waste, anaerobic dry fermentation is conducted to generate biogas, and residues are subjected to water washing and then separated into biogas slurry and biogas residues; the biogas slurry serves as a culture solution to culture saccharomyces cerevisiae, and inoculation fluid is obtained; the biogas residues are converted into dissolved sugar through cellulase and separated into solid residues and a sugar solution; the inoculation fluid and the sugar solution are mixed and fermented, the solid residues in a product are used for serving as raw materials for anaerobic dry fermentation, liquid is subjected to distillation, and ethyl alcohol is obtained; the solid residues are used for producing lignin. Accordingly, the organic waste can be efficiently converted into three products of methane, ethyl alcohol and lignin, the efficient utilization of resources and additional value promotion are achieved, the technology greening and cleanliness levels are high, and no waste discharge exists in the whole technology.

Description

technical field [0001] The invention relates to the fields of environmental protection and resource utilization, in particular to a method for resource utilization of agricultural organic waste. Background technique [0002] With the rapid development of economy and society, a large amount of agricultural waste is produced every year in our country. Along with the raising of people's living standard in addition, aquaculture develops rapidly, thus produces a large amount of poultry manure. These wastes can produce biogas, biogas slurry and biogas residue in an anaerobic environment. In the traditional process, biogas can be used for power generation and heating after desulfurization and denitrification treatment. Biogas slurry and biogas residue can be used as green fertilizer for agricultural production. [0003] Anaerobic dry fermentation, also known as solid anaerobic fermentation, is one of the main processes, and the total solid content in the reaction system can reac...

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Problems solved by technology

[0005] In order to avoid the shortcomings of the above-mentioned prior art, the present invention provides a method for the comprehensive utilization of agricultural organic waste resources, aiming to solve the problems of low methane yield, biogas slurry and biogas in the existing anaerobic dry fermentation process. The problem of limited utilization of slag

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