Process for treating high-concentration printing and dying waste water

Abstract

The invention provides a process for treating high-concentration printing and dying waste water. The waste water treatment process comprises the following steps of: a, aerating and adsorbing active carbon; b, adjusting pH value and filtering; c, performing anaerobic treatment; d, performing aerobic treatment; e, de-coloring; f, performing secondary filtering; and g, treating with a membrane bio-reactor (MBR) film. The waste water treatment process has a compact process, is easy and convenient to operate, can be used for treating waste water with a slightly high chemical oxygen demand (COD) value and is a set of high-quality, high-efficiency and stable waste water treatment process; and treated water has high quality and can meet the requirement on recycling water for production.

Description

technical field [0001] The invention relates to a printing and dyeing wastewater treatment process, in particular to an efficient and high-quality treatment method for high-concentration wastewater, belonging to the field of printing and dyeing. Background technique [0002] Highly polluted wastewater will be produced in the process of textile printing and dyeing production. If it is not treated properly, it will cause huge pollution to the environment. By establishing a sewage treatment plant and using a combination of biochemical and physicochemical treatments, COD, BOD, SS, ammonia nitrogen, total Nitrogen, total phosphorus, decolorization and disinfection purposes to make it meet discharge standards. Wastewater generally has the characteristics of large water volume, high chroma, and complex tissue components. At present, the methods of printing and dyeing wastewater treatment mainly include: chemical coagulation, biochemical treatment, and physical treatment. The effic...

AI Technical Summary

Problems solved by technology

Wastewater generally has the characteristics of large water volume, high chroma, and complex tissue components. At present, the methods of printing and dyeing wastewater treatment mainly include: chemical coagulation, biochemical treatment, and physical treatment. The effect of purifying wastewater, but there are certain shortcomings, such as the chemical coagulation method is simple, easy to cause secondary pollution, and the biochemical treatment method is not perfect in the decolorization link

Especially for high-concentration printing and dyeing wastewater, a complete treatment system has not been established so far. Therefore, it has certain practical significance to establish a high-concentration printing and dyeing wastewater treatment system with a complete structure, compact process, and good process performance.

[0003] In order to solve the above technical problems, the Chinese utility model patent "200510101734.X", titled "Printing and Dyeing Wastewater Treatment Process", discloses a wastewater treatment process, which mainly includes: adjusting pH value, primary filtration, decolorization Flocculation, secondary filtration, oxidation and dehydration, this process can basically meet the purification index, but the chemicals and electric energy used in biochemical treatment and physical treatment are relatively high, and the cost is relatively high. For high COD values ​​in wastewater, the treatment effect is average

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