Method of producing biogas through high-solid two-phase three-stage anaerobic digestion by using perishable organic wastes

Abstract

The invention provides a method for producing biogas through high-solid two-phase three-stage anaerobic digestion by using perishable organic wastes, which comprises the following steps: the perishable organic wastes are hydrolyzed in a hydrolysis acidogenic reactor, and a mixture obtained after hydrolysis is acidified to generate a large number of organic acid products with low molecular weight; the bottom of the hydrolysis acidogenic reactor is communicated with the bottom of a methanogenic reactor through a circulation pump and a pipeline; the top of the methanogenic reactor is communicated with the top of the hydrolysis acidogenic reactor; and the acetic acid producing reaction is carried out in the methanogenic reactor and the methane producing reaction is continuously carried out. The invention can separate the hydrolysis acidogenic process from the acetic acid and methane producing process in the anaerobic digestion process so as to prevent organic acids generated by the perishable organic wastes from inhibiting methanogenesis. The device has simple processing procedure, low cost, easy maintenance and stable and reliable performance, is suitable for anaerobic digestion treatment of various perishable organic wastes, and has highly efficient and stable biogas production capacity of the perishable organic wastes through the anaerobic digestion.

Description

Method for producing biogas by anaerobic digestion of high-solid two-phase three-stage perishable organic waste technical field The invention relates to a method for treating organic garbage, more specifically, the invention relates to a method for producing biogas by high-solid two-phase three-stage anaerobic digestion using perishable organic garbage as raw materials. technical background Perishable organic waste mainly refers to perishable and biodegradable waste generated in the process of life and production, including kitchen waste, slops, vegetable, fruit and meat processing waste, etc. Due to the acceleration of urbanization and the improvement of living standards, not only the absolute output of perishable organic waste has increased significantly, but also the proportion of urban domestic waste has also increased significantly. More than 50% of. The biggest feature of perishable organic waste is the high moisture content and organic matter content, the moisture ...

AI Technical Summary

Problems solved by technology

At this time, not only a large amount of water needs to be consumed to reduce the concentration of raw materials, but also the low concentration of raw materials greatly reduces the efficiency of anaerobic digestion of perishable organic waste and the ability to produce biogas

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