System for instantly and efficiently recovering volatile fatty acid from mixed fermentation liquor

Abstract

The invention provides a system for instantly and efficiently recovering volatile fatty acid from mixed fermentation liquor, which comprises a fermentation tank used for placing to-be-fermented articles and internally provided with a stirrer used for stirring the to-be-fermented articles; a microbial fuel cell unit, which is arranged in the fermentation tank and is used for treating the to-be-fermented articles to obtain acid-containing waste liquid; an electrodialysis unit, which is connected with the microbial fuel cell unit through an acid-containing waste liquid guide pipe and is used for carrying out electrodialysis on the acid-containing waste liquid to obtain an acid-containing concentrated solution; and a product collecting tank, which is connected with the electrodialysis unit through a concentrated solution guide pipe and is used for collecting the acid-containing concentrated solution. According to the invention, the electrodialysis system is coupled with the microbial fuel cell, and the volatile fatty acid is timely recovered and concentrated from the mixed fermentation liquid under the condition of self power supply, so that the environmental protection concept of treating waste with waste is implemented, and the maximum utilization of energy is realized.

Description

Technical field [0001] The present invention is a high concentration of solid-liquid waste and new energy technologies, and particularly relates to a system for real time efficient recovery of volatile fatty acids from the mixed fermentation broth. Background technique [0002] With the continuous economic development, people's living standards gradually improved, which not only makes the consumption of various energy increases, but also the living environment presents a greater challenge. Anaerobic digestion technology is currently one of the main disposal of solid organic waste, it is put into a large number of practical applications. Anaerobic fermentation technology in solid waste as raw material, under anaerobic conditions to produce methane, carbon dioxide and other gases from the methane fermentation bacteria, small amounts of water with vigorous renewable energy production technology. The anaerobic fermentation of organic waste more energy can be converted into substance....

AI Technical Summary

Problems solved by technology

Electrodialysis effectively concentrates the microfiltration recovery stream, and 92% of the VFA is transferred to the concentrate, which proves the advantages of electrodialysis recovery and concentration of VFA. There are few studies on obtaining VFA in liquid

[0007] On the other hand, all electrodialysis systems on the market today need to be operated under the condition of an external power supply, which increases the operating cost and causes a waste of energy

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