Advanced treatment system for dye wastewater

Abstract

The invention relates to an advanced treatment system for dye wastewater. The advanced treatment system comprises a wastewater regulation tank, an adsorption sedimentation tank, an ozonation sedimentation tank, a padding-type anoxic and anaerobic reaction tank, an aerobiotic contact oxidation tank, a secondary sedimentation tank, a sand filter tank and a clean water tank. The adsorption sedimentation tank comprises a stirring and mixing zone and a sedimentation zone. The ozonation sedimentation tank comprises an aeration mixing zone and a sedimentation zone. The padding-type anoxic and anaerobic reaction tank is divided into a facultative segment, an anoxic segment and an anaerobic segment by baffle plates. The aerobiotic contact oxidation tank is provided with a water inlet pipe, a water distribution triangle cone, padding and an aeration regulation and control system. The flow and quality of the wastewater are regulated through the regulation tank; the wastewater enters the adsorption sedimentation tank so that pollutants can be removed; then, the wastewater enters the ozonation sedimentation tank, and the pollutants are subjected to oxygenolysis; the wastewater enters the padding-type anoxic and anaerobic reaction tank and the aerobiotic contact oxidation tank to be subjected to anoxic reaction, anaerobic reaction and aerobic reaction, and enters the clean water tank to be recycled after sedimentation and filtration.

Description

Technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a dye wastewater advanced treatment system. Background technique [0002] my country is a major dye production country, and it discharges nearly 600 million tons of dye wastewater a year. Dye wastewater generally contains a variety of dyes and a large number of complex organic and inorganic pollutants. The molecular weight of these pollutants is generally large, the structure is complex, and the chemical structure is stable, resulting in COD as high as tens of thousands, but the wastewater has poor biodegradability. . A large number of harmful substances in dye wastewater will cause serious pollution if they are directly discharged into the water environment without treatment. [0003] The composition of dye wastewater is complex and the biodegradability is poor. It is difficult to achieve the ideal treatment effect with a single method. Usually, physical, chemical, biolo...

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Problems solved by technology

[0005] At the same time, the output of rice husks in my country has remained high, and the existing resource utilization methods have not been implemented on a large scale, resulting in a large number of rice husks being discarded. Therefore, it is necessary to explore new technologies for resource utilization of rice husks.

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