Process for treating high-concentration printing and dying waste water

A printing and dyeing wastewater and treatment process technology, applied in the printing and dyeing field, can solve the problems of high cost, large water volume, secondary pollution, etc., and achieve the effect of simple operation, high water quality and compact links

Inactive Publication Date: 2011-05-04
CHANGSHU FUYI PRINTING & DYEING
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Process for treating high-concentration printing and dying waste water
  • Process for treating high-concentration printing and dying waste water

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Embodiment

[0022] Before treatment, the pH value of the wastewater is 10, the COD is 4000, the BOD is 400, the SS suspended matter is 500, and the chromaticity is 1000.

[0023] The specific operation steps are as follows:

[0024] a. Activated carbon aeration adsorption, add activated carbon packs to the wastewater, use the bubble aeration method to oxidize and decompose the organic matter in the wastewater, and through the activated carbon adsorption, reduce the content of iron, manganese and other elements in the wastewater, so that the COD value in the wastewater will be 2000. A large number of bubbles will be generated during the aeration process, adding a defoamer with polysiloxane as the main material to stabilize the solution and provide stable conditions for subsequent processing;

[0025] b. Adjust the pH value and filter, introduce the printing and dyeing wastewater into the buffer tank, add acid and alkali solution to adjust the pH value to about 6-8, add filter aid diatomit...

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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...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30
Inventor 吴志明
Owner CHANGSHU FUYI PRINTING & DYEING
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