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

A mustard wastewater and pretreatment technology, which is applied in the direction of food industry wastewater treatment, water/sewage treatment, water treatment parameter control, etc., can solve the problems of high process operation cost, poor pollutant removal effect, long process flow, etc., and achieve reduction pollution concentration, solve the effect of poor nitrification stability and shorten the process flow

CN112250214APending Publication Date: 2021-01-22CHONGQING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-01-22

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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.
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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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Embodiment Construction

[0034] see figure 1 , figure 2 , the method for high-salt wastewater pretreatment of the present invention adopts the system of high-salt wastewater pretreatment to carry out, specifically as follows:

[0035] A system for pretreatment of high-salt mustard mustard wastewater, the system includes a regulating tank 17 arranged in sequence, a circulating reaction tank 18, an intermediate tank 19, and a sedimentation tank 20. 16, the pipeline is provided with valves and water pumps, and the grid 16 is used to filter out impurities and suspended solids in the waste water to be treated; the downstream of the regulating pool 17 is connected to the circulation reaction pool 18 through the main water inlet pipe 3, the The main water inlet pipe 3 is provided with a first water pump 1 and a first check valve 2, as well as a flow meter for measuring the inflow flow. The first water pump 1 is used to draw water from the regulating pool 17, and the first check valve 2 Used to prevent bac...