Device for producing biogas through straw two-phase anaerobic fermentation

Abstract

The invention discloses a device for producing biogas through straw two-phase anaerobic fermentation, and relates to the technical field of straw fermentation. The device comprises a hydrolysis part,an acidification part and a biogas part, wherein the hydrolysis part comprises a steam generator, a hydrolysis tank and a first feeding tank; the acidification part comprises an acidification tank anda second feeding tank; and the biogas part comprises a biogas generation tank and a biogas storage tank. According to the device, the hydrolysis part, the acidification part and the biogas part are arranged, a traditional two-phase mode is separated, acid production and gas production are conducted separately, and the problems that existing straw is low in biotransformation rate, low in biogas yield and poor in quality are solved; the steam generator generates steam to fumigate straw, lignin, cellulose and hemicellulose substances in the straw are softened, and microorganism decomposition andutilization are more convenient; acetic acid-feeding methanogenic bacteria and hydrogen-feeding methanogenic bacteria are introduced into a methanogenic phase; and the yield of the biogas is increased, and the quality of the biogas is improved.

Description

technical field [0001] The invention belongs to the technical field of straw fermentation, in particular to a straw two-phase anaerobic fermentation biogas production device. Background technique [0002] my country has very rich straw resources. In recent years, the use of straw for biogas production has become an important technical approach for straw resource utilization and energy utilization. The traditional straw single-phase anaerobic fermentation technology has problems such as low straw degradation rate, difficulty in feeding and discharging materials, and easy formation of scum layer on the surface. The straw two-phase anaerobic digestion process has the advantages that the single-phase process does not have. It can separate and optimize the hydrolytic acidification and methanation respectively, avoiding the acid accumulation caused by the limitation of the methane production rate in the early stage and the limitation of the hydrolysis rate in the later stage in th...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a device for producing biogas by two-phase anaerobic fermentation of straw. By setting up a hydrolysis section, an acidification section and a biogas section, the traditional two-phase mode is separated, so that acid production and gas production can be carried out separately, solving the problem of The existing straw bioconversion rate is low, the biogas yield is low, and the quality is poor

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