Device and method for deep treatment of petrochemical wastewater secondary biochemical effluent

Abstract

The invention relates to a treatment device for deep treatment of petrochemical wastewater secondary biochemical effluent. The treatment device comprises a decomposition groove, wherein a sealing partition plate for dividing the decomposition groove into an ozone catalytic oxidation area positioned at the upper portion and an ozone tail gas decomposition area positioned at the lower portion is arranged in the decomposition groove, the ozone catalytic oxidation area is connected with a wastewater secondary sedimentation pool through a water inlet pipeline, an overflow pipe leading into the ozone tail gas decomposition area from the upper portion of the ozone catalytic oxidation area is arranged in the decomposition groove, manganese sand or a ceramic filler is arranged at the bottom of theozone tail gas decomposition area, a water outlet pipeline is arranged on the ozone tail gas decomposition area, an ozone aerator is fixedly arranged at the bottom of the ozone catalytic oxidation area and is connected with an ozone supply mechanism through an ozone pipeline, and the water outlet pipeline is connected into a biological aerated filter or other subsequent equipment. The invention also discloses a method for deep treatment of petrochemical wastewater secondary biochemical effluent. The method and the device provided by the invention can be used for deep treatment of petrochemicalwastewater secondary biochemical effluent, and have the advantages of high treatment efficiency, stable and up-to-standard treated effluent, low investment and low operation cost.

Description

technical field [0001] The invention relates to the treatment of petrochemical wastewater, in particular to a treatment device for advanced treatment of secondary biochemical effluent of petrochemical wastewater. The invention also relates to a method for advanced treatment of secondary biochemical effluent of petrochemical wastewater by using the aforementioned device, which belongs to the field of wastewater treatment. Background technique [0002] Petrochemical wastewater is mainly composed of wastewater containing various inorganic salts and organic matter produced in the process of petroleum extraction and refining. It contains pollutants such as oil, ammonia, salt, and phenol. The composition is complex and difficult to treat. After secondary biochemical treatment, most of the suspended solids and organic matter are removed, and the COD concentration of the effluent is relatively low, but it still has the characteristics of complex components, more characteristic pollut...

AI Technical Summary

Problems solved by technology

At present, the application research of ozone catalytic oxidation + biological treatment combined process has overcome the problems of low utilization rate of direct ozone oxidation, large dosage, slow reaction speed, substrate selectivity and high energy consumption, but the effluent water of catalytic oxidation reactor still remains There is also a certain concentration of ozone and hydroxyl radicals, which have strong oxidizing and bactericidal effects, and cannot directly enter the post-biochemical system. It takes a certain period of time to completely decompose the residual ozone and hydroxyl radicals to ensure that they are not harmful to microorganisms in the biological treatment process. Produce toxic effects and reduce the effect of biological further treatment

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