Efficient hydrolytic acidification method suitable for treating agricultural wastes with high solid content and fermentation device

Abstract

The invention discloses an efficient hydrolytic acidification method suitable for treating agricultural wastes with a high solid content and a fermentation device. The fermentation device comprises ahydrolytic acidification reactor (1), a hot water circulation system (2), a leachate and biogas liquid spraying adjustment system (3) and an aeration system (4), wherein the hydrolytic acidification reactor (1) is suitable for treating the agricultural wastes with the high solid content; a forklift is adopted to directly feed and discharge materials; the hot water circulation system (2) continuously supplies a heat source to the reactor for fermentation at a medium temperature; through the leachate and biogas liquid spraying adjustment system (3), leachate (acidizing fluid) and biogas liquid are refluxed and sprayed to enhance continuous hydrolysis and acidification ability of the materials; the aeration system (4) provides a micro-aerobic hydrolytic acidification environment for a hydrolytic acidification reaction so as to enhance hydrolysis. The efficient hydrolytic acidification method suitable for treating the agricultural wastes with the high solid content and the fermentation device provided by the invention can effectively improve difficult feeding and discharging, hydrolysis easy to be inhibited by acid production feedback and other difficulties of a continuous operation reactor using the agricultural wastes as raw materials, and have management convenience, low operation energy consumption, and relatively good application prospect and promotion value.

Description

technical field [0001] The invention belongs to the field of biogas engineering, and is used for improving the hydrolysis and acidification efficiency in the two-phase anaerobic fermentation process using agricultural waste such as crop stalks, livestock and poultry manure, and tail vegetables as raw materials, especially for processing materials with high solid content The designed hydrolytic acidification method with spraying, leachate biogas slurry return and its device. Background technique [0002] The use of anaerobic fermentation to produce biogas is one of the main ways to promote the resource utilization of agricultural waste, and it is also an important way to promote the green development of agriculture and reduce non-point source pollution. Agricultural wastes are mainly crop straws, livestock and poultry manure, and end vegetables. During the anaerobic fermentation process, especially for fiber-rich raw materials such as crop straws and cow dung, hydrolysis is t...

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Problems solved by technology

Moreover, the solid content is high, the easily degradable components of the material quickly produce acid, and the feedback inhibition further limits the hydrolysis of the material

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