High concentration multi-feedstock mixed anaerobic fermentation method

Abstract

The invention discloses a high concentration multi-feedstock mixed anaerobic fermentation method, and belongs to the field of renewable energy development and utilization. The method includes the following steps that: pig manure is subjected to precipitation and degritting in a homogenization tank, preheated and put into a fermenter for anaerobic fermentation; rice straw is pretreated in a hydrolysis tank and put into the fermenter for anaerobic fermentation; pigs that die from disease are treated by high temperature digestion for harmless treatment, and the discharged materials enter into thehomogenization tank and are preheated and put into the fermenter for anaerobic fermentation. The method has the advantages of simple method, strong adaptability and simple operation, and can realizecontinuous, large-volume, automatic production and processing, and greatly improve the production efficiency of methane.

Description

technical field [0001] The invention belongs to the field of renewable energy development and utilization, in particular to a method for mixed anaerobic fermentation of various raw materials. Background technique [0002] With the increasing emphasis on sustainable development and the protection of the earth's environment, the development and utilization of biomass resources has attracted widespread attention, and its anaerobic fermentation to generate biogas has attracted more and more attention. Biogas is a mixed gas produced by microbial fermentation of organic matter under anaerobic conditions. In terms of solid waste treatment, anaerobic biological treatment technology mainly treats easily biodegradable raw materials with high moisture content, such as sewer sewage Mud, livestock manure, etc. As the largest by-product in agricultural production, rice straw is also the main target of anaerobic biological treatment technology. For a long time, people have been committed...

AI Technical Summary

Problems solved by technology

At present, domestic biogas projects mostly use livestock and poultry manure (pig manure, cow manure, chicken manure) as the main raw material. The ammonia inhibition effect caused by the high nitrogen content in manure limits the feed concentration and gas production efficiency of anaerobic fermentation; Weiland early In 2000, it was pointed out that mixed anaerobic fermentation and selection of excellent mixed raw materials can obtain a more suitable nutritional balance, which is the main development direction of high-concentration anaerobic fermentation technology. The successful practice of European biogas projects in the past two decades has also proved at this point

Images