A treatment device and method for the degradation and denitrification of high-concentration organic matter in printing and dyeing wastewater

Abstract

The invention discloses a treatment device for degradation and nitrogen removal of printing and dyeing wastewater high-concentration organic matters, wherein to-be-processed wastewater after being treated by a pretreatment unit is immersed in an anaerobic hydrolysis pool; the treatment device for degradation and nitrogen removal of the printing and dyeing wastewater high-concentration organic matters is characterized by including an anoxic pool, a hypoxic pool, an aerobic pool, a secondary precipitation pool and a high-clarification pool which are successively connected, wherein a water outlet of the anaerobic hydrolysis pool is connected to a water inlet of the anoxic pool, the secondary precipitation pool is connected with the hypoxic pool and the anaerobic hydrolysis pool through a sludge backflow pipe respectively. The treatment device has good removal effects on CODCr, ammonia nitrogen and total nitrogen in the printing and dyeing wastewater, especially can stably reach standards on removal of nitrogen, allows the treated wastewater to meet water quality standards of printing and dyeing wastewater discharged into urban sewers, and lays a foundation for deep treatment. A conventional printing and dyeing wastewater treatment process are improved and optimized, and the treatment device has the remarkable advantages of good treatment effect, low sludge production quantity, small land occupation area, stable effect and low operating costs, and has popularization values.

Description

technical field [0001] The technical scheme of the invention belongs to the field of wastewater treatment, and in particular relates to a treatment device and method for degrading and denitrifying high-concentration organic matter in printing and dyeing wastewater. Background technique [0002] Printing and dyeing refers to the process of chemical treatment of textile materials (fibers, yarns, threads and fabrics). Printing and dyeing mainly includes several processes such as desizing, scouring, bleaching, mercerizing, dyeing, printing and finishing. Printing and dyeing wastewater has the characteristics of high concentration of organic matter, large chroma, complex composition, large changes, and difficult treatment. The differences in products, production processes, and wastewater sources of printing and dyeing enterprises determine the complexity of printing and dyeing wastewater quality. Printing and dyeing enterprises produce a variety of products. In addition to the ...

AI Technical Summary

Problems solved by technology

However, there are not many reports on the treatment technology of printing and dyeing wastewater under low oxygen conditions, and the existing technologies are not very effective in solving the problem of printing and dyeing wastewater pollution.

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