High purification treatment system for dyeing wastewater

Abstract

The invention relates to a system for treating dye printing wastewater with high purification degree. The system mainly comprises a hydrolysis acidification pool, an aerobic biological filter tank and photocatalytic oxidation purification equipment; the front of the hydrolysis acidification pool is sequentially provided with a primary precipitation pool, a pre-aeration adjusting pool and a grid; the rear of the hydrolysis acidification pool is connected with the aerobic biological filter tank; the rear of the aerobic biological filter tank is provided with a secondary precipitation pool; the photocatalytic oxidation purification equipment is provided with an upper transverse clapboard and a lower transverse clapboard for dividing the space of a tank into a middle part, an upper part and a lower part; the upper clapboard and the lower clapboard are orifice plates; the middle part of the space in a tank body is a fluidized bed chamber; the lower part is a mixing chamber; the upper part is a steady flow chamber; the fluidized bed chamber is provided with a plurality of ultraviolet lamps vertically extending; the insides of the ultraviolet lamps are filled with photocatalyst particles; the surfaces of the photocatalyst particles are distributed with photocatalyst; a water inlet pipe of the photocatalytic oxidation purification equipment is connected with the mixing chamber; the extending direction of the water inlet pipe is oblique or tangential; a water outlet pipe of the photocatalytic oxidation purification equipment is connected with the steady flow chamber; the extending direction of the water outlet pipe is radial; and the tank body is also provided with an ozone inlet pipe. The system has a reasonable structure and high purification depth; and the dye printing wastewater is treated to realize requirement of recycling.

Description

field of invention [0001] The invention relates to a waste water treatment system mainly used for treating printing and dyeing sewage, which belongs to the field of environmental protection. Background technique [0002] Printing and dyeing wastewater contains high concentrations of COD, BOD and chroma, of which chroma can reach 100-400 times, BOD 5 Up to 100-400mg / l, COD cr It can reach 600-800mg / l, and the organic matter in it has poor biodegradability, and the emission is unstable, so it is difficult to adopt the usual biological treatment method. Contents of the invention [0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-purity printing and dyeing wastewater treatment system, with a reasonable technological process, which can effectively eliminate organic pollutants in the printing and dyeing wastewater, and electrolytically treat the process of dyeing wastewater through electro-biochemical treatment equi...

AI Technical Summary

Problems solved by technology

[0002] Printing and dyeing wastewater contains high concentrations of COD, BOD and chroma, of which chroma can reach 100-400 times, BOD 5 Up to 100-400mg / l, COD cr It can reach 600-800mg / l, and the organic matter in it has poor biodegradability, and the emission is unstable. It is difficult to adopt the usual biological treatment method

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