Device and method for concentrating and recycling anaerobic acid-producing kitchen waste fermentation solution

Abstract

The invention discloses a device and a method for concentrating and recycling an anaerobic acid-producing kitchen waste fermentation solution. The method comprises a treatment chamber, and two layersof positive osmosis membranes which are mounted inside the chamber and are parallel to the chamber wall, wherein a driving solution passage is formed between the two layers of positive osmosis membranes; a fermentation solution passage is formed between each of the positive osmosis membranes on the two sides and the chamber wall. Through a positive osmosis membrane principle and a unique design ofa membrane assembly, the concentration of the recycled and concentrated anaerobic acid-producing kitchen waste fermentation solution can be greatly increased and the long-distance transportation costof the anaerobic acid-producing fermentation solution can be reduced. Through the device and the method, the anaerobic acid-producing fermentation solution is recycled and concentrated as a good denitrifying and dephosphorizing organic carbon source for resource utilization, so that the purpose of ectopically applying the anaerobic acid-producing fermentation solution to a domestic sewage treatment plant, an industrial sewage station, a landfill leachate treatment station and the like is achieved.

Description

technical field [0001] The invention relates to a device and method for concentrating and recovering anaerobic acid-producing fermentation liquid of kitchen waste. Background technique [0002] With the aggravation of water pollution and eutrophication, and the improvement of public environmental awareness, the country's discharge limit standards for nitrogen and phosphorus pollutants are becoming increasingly stringent. Therefore, national and local governments continue to improve sewage treatment discharge standards. For example, the discharge standard for domestic sewage treatment was raised from Class B standard to Class A standard, and the discharge standard for landfill leachate was raised from 1000 mg / L of ammonia nitrogen discharge limit to 40 mg / L of total nitrogen discharge limit. Therefore, the efficient and up-to-standard treatment of total nitrogen in sewage is the most important link to achieve up-to-standard treatment. Biological treatment is currently the mo...

AI Technical Summary

Problems solved by technology

The concentration of volatile organic acids in the anaerobic fermentation of traditional food waste is 10-50g / L. If this kind of wastewater is directly transported to sewage treatment plants or industrial sewage treatment plants, the transportation cost will be high due to its low concentration and large water demand. very high

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