Method and system for pretreating high-salt preserved szechuan pickle wastewater

Abstract

The invention provides a method and system for pretreating high-salt preserved szechuan pickle wastewater. The system comprises a grid, an adjusting tank, a circular reaction tank, an intermediate tank and a sedimentation tank. According to the method and system, halophilic compound bacteria on a suspended filler in the circular reaction tank are reinforced, so that two microorganisms, namely a compound microbial agent growing on the surface of the filler in an attached manner and activated sludge growing in a suspended manner, can coexist in a system, and most of organic matters and ammonia nitrogen in the preserved szechuan pickle wastewater are removed; suspended matters in the purified wastewater are further removed through the sedimentation tank, so that the load of a subsequent electrodialysis treatment process can be reduced, the treatment efficiency is improved, and the operation cost is reduced. The method disclosed by the invention has the characteristics of high microorganism concentration, strong impact load resistance, high organic load treatment capacity, strong biological nitrogen and phosphorus removal capacity, good pretreatment effect, low engineering investment and operation cost and the like.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method and system for pretreatment of high-salt mustard mustard wastewater. Background technique [0002] Mustard pickling wastewater belongs to the "three high" wastewater of organic matter, ammonia nitrogen and salinity (salinity is 1% to 15%). Usually, this kind of wastewater is directly discharged, causing river and groundwater pollution, and seriously affecting the surrounding ecological environment. At present, the treatment of this kind of wastewater adopts a combined process of physicochemical and biochemical, or it is mixed with other wastewater to form comprehensive wastewater and then treated by conventional biochemical treatment technology. [0003] Biological method is a treatment technology with high treatment efficiency, good stability and low treatment cost, but the tolerance concentration of conventional water treatment microorganisms to salinity is ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for the pretreatment of high-salt mustard mustard wastewater. The mustard mustard wastewater treated by this method is used for subsequent electrodialysis treatment, so that the ion exchange membrane in the electrodialysis equipment can work normally and ensure The normal operation of electrodialysis equipment solves the problems of traditional electrodialysis treatment at high salinity, because microorganisms are greatly affected by high salt poisoning, and the removal effect of pollutants is poor, resulting in long process flow and high process operating costs.

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