Printing and dyeing wastewater treatment system and technology

Abstract

The invention discloses a printing and dyeing wastewater treatment system and technology. An HCAO (hydrolytic acidification dominant bacterial strain aerobic contact oxidation) system which is summarized and developed by the applicant according to many years of practical experience in the printing and dyeing wastewater engineering is used for treating high-concentration printing and dyeing wastewater, the content of SS (suspended solids) and BOD in recycled water can meet discharge requirement, sludge activity is good, and settling property is good. The printing and dyeing wastewater treatment technology disclosed by the invention has the advantages that the printing and dyeing wastewater can be deeply treated, and the standards of recycled water are met, so that pure investment on wastewater treatment is changed into investment with output, the multiple effects of reducing discharge amount of wastewater, saving water resource and protecting the environment are achieved, and the market demand of the spinning, dyeing and finishing industry can be met.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a printing and dyeing 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 of...

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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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