Dyeing and finishing wastewater treatment system and technology

Abstract

The invention discloses a dyeing and finishing wastewater treatment system which comprises a first-level treatment unit, a first-level precipitation unit, at least one set of second-level treatment unit and a second-level precipitation unit, wherein the second-level treatment unit is connected with a corresponding second-level precipitation unit; the first-level treatment unit comprises a grid pool and a wastewater regulating pool; the first-level precipitation unit comprises a coagulative precipitation tank; the second-level treatment unit comprises a hydrolytic acidification cell, a first aerobic contact oxidation cell, a second aerobic contact oxidation cell and a reaction buffering pool which are connected in sequence; the second-level precipitation unit comprises a second-level precipitation pool and a reverse multi-element filtering pool; and the reverse multi-element filtering pool is connected with a clean water pool. The invention also discloses a wastewater treatment technology adopting the dyeing and finishing wastewater treatment system. According to the dyeing and finishing wastewater treatment system and technology disclosed by the invention, the textile wastewater can be deeply treated, the wastewater can reach the standard of recycled water, multiple effects of reducing wastewater discharge, saving water resources and protecting environment can be achieved, and the dyeing and finishing wastewater treatment system can meet the market requirement of the textile dyeing and finishing industry.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a dyeing and finishing wastewater treatment system and process. Background technique [0002] At present, the problem of water pollution in our country is still serious, especially the water pollution in coastal cities below the second tier like Quanzhou City is quite serious, and the culprit of these water pollution is the wastewater discharge from the textile dyeing and finishing industry. These wastewater discharges are mainly treated by centralized control. That is to say, the comprehensive treatment of sewage treatment plants, and the enterprises themselves classify and recycle less waste water. This treatment method consumes a lot of water resources, and the operating costs of enterprises are relatively high, which has also caused greater pressure on local environmental protection. [0003] Due to the development of the chemical industry, the fabric raw materials o...

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Problems solved by technology

[0002] At present, the problem of water pollution in my country is still serious, especially the water pollution in coastal cities below the second tier like Quanzhou City is quite serious, and the culprit of these water pollution is the wastewater discharge of the textile dyeing and finishing industry. These wastewater discharges are mainly treated by centralized control. That is to say, the comprehensive treatment of sewage treatment plants, and the enterprises themselves classify and recycle less waste water. This kind of treatment consumes a lot of water resources, and the operating costs of enterprises are relatively high, which also causes greater pressure on local environmental protection.

[0003] Due to the development of the chemical industry, the fabric raw materials of the textile industry have developed from traditional natural fibers to a large number of man-made fibers, and there are more and more types of dyes, and they are less and less biodegradable. It is also increasingly replaced by artificial chemicals. Most of these chemicals are difficult to degrade directly, resulting in the quality of wastewater from being relatively stable and easy to degrade to complex and changeable and difficult to degrade.

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