Technique for treating low-concentration livestock manure

Abstract

The invention discloses a technique for treating low-concentration livestock manure. Adopted main equipment comprises a manure buffer pool, a primary concentration pool, an anaerobic biomagnified fermentation reactor, a short-range anaerobic biological fermentation reactor and a secondary concentration pool. The technique comprises the following steps: pretreatment of materials, fermentation treatment of the materials and reflux control of a mixed liquid material. With adoption of the technical measures of quality-divided feeding and multi-point reflux, the gas production efficiency of a system is increased by 20%, and the hydraulic retention time of an anaerobic fermentation system in the whole process is reduced by 20%.

Description

technical field [0001] The invention belongs to the field of waste treatment and resource utilization, and in particular relates to a process method for treating low-concentration (total solid content TS<5%) livestock and poultry manure. Background technique [0002] At present, large-scale livestock and poultry farms usually adopt the feeding method of flushing manure with water for the sake of improving production efficiency and strengthening epidemic prevention safety, that is, using water to transport livestock and poultry manure through pipelines to a biogas station for centralized treatment of manure. Such a process design can not only reduce the intensity of manual manure cleaning and improve the efficiency of manure cleaning, but more importantly, the underground pipeline transports manure, so that the cleaning work area and the manure removal area are separated, and the two work areas with completely different hygienic standards are located in different spaces to ...

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The methods and parameters disclosed in the above patents cannot

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