Printing and dyeing wastewater processing system

Abstract

The invention discloses a printing and dyeing wastewater processing system. The printing and dyeing wastewater processing system comprises a comprehensive wastewater preprocessing system, a depth reuse processing system and a sludge processing system, wherein the sludge processing system comprises a sludge pool; the comprehensive wastewater preprocessing system comprises an adjustment pool, a coagulative precipitation pool, a water discharging pool, a biological hydrolysis-acidification pool, an aerobic contact oxidation pool, a radial flow type secondary sedimentation pool and an intermediate water pool which are sequentially connected; the depth reuse processing system comprises an automatic backwashing sand filtration system, a pressure type ultrafilter membrane system, an RO membrane system and an RO reuse water pool which are sequentially connected; the sludge outlet of the radial flow type secondary sedimentation pool is communicated with the sludge pool; and the water outlet of the intermediate water pool is communicated with the automatic backwashing sand filtration system. According to the invention, the quality of the depth reuse water reaches outlet water quality standards; and the deepwater reuse can saves the water resource, and COD discharge is reduced year by year, so the content of discharged ammonia nitrogen can reach standards.

Description

technical field [0001] The invention relates to the technical field of multistage treatment of industrial wastewater, in particular to a printing and dyeing wastewater treatment system. Background technique [0002] The printing and dyeing industry is a major user of water and sewage. Printing and dyeing enterprises generally have a sewage treatment system. The existing sewage treatment system mainly adopts physical and chemical pretreatment processes. After the sewage is treated up to the standard, it is directly discharged into the pipe, such as figure 1 As shown, enter the urban sewage treatment pipe network or directly discharge into surface water bodies. However, since the existing system does not carry out biochemical treatment, ammonia nitrogen exceeds the standard, and considering the increasing shortage and serious pollution of water resources, it is necessary to carry out in-depth treatment of printing and dyeing wastewater no matter from the perspective of enterpr...

AI Technical Summary

Problems solved by technology

However, since the existing system does not carry out biochemical treatment, ammonia nitrogen exceeds the standard, and considering the increasing shortage and serious pollution of water resources, it is necessary to carry out in-depth treatment of printing and dyeing wastewater no matter from the perspective of enterprise cost or social environmental protection. Reuse for production after processing

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