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Efficient treatment method for printing and dyeing wastewater

A technology for printing and dyeing wastewater and treatment methods, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high cost, poor treatment effect, and high inorganic salt content, and achieves Simple process, zero-emission, high-efficiency treatment method

Inactive Publication Date: 2015-09-23
常熟新锦江印染有限公司
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  • Abstract
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Problems solved by technology

The existing treatment methods have defects such as high cost, poor treatment effect, and high content of inorganic salts

Method used

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  • Efficient treatment method for printing and dyeing wastewater

Examples

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Embodiment 1

[0025] This example discloses a high-efficiency treatment method for printing and dyeing wastewater. The printing and dyeing wastewater is transported to an oxidation sedimentation tank, and ferrous sulfate or potassium permanganate oxidant is added first, and after stirring evenly, it is left to stand for oxidative treatment for 30 to 90 minutes, so that harmful The substance is oxidized and decomposed; then add coagulant polyaluminum chloride accounting for 1% of the waste water to it, stir evenly, let it settle for 6-24 hours, filter, pass the supernatant through a mechanical grid, and introduce anaerobic In the aerobic reactor, the anaerobic aerobic reactor is adjusted to an anaerobic state by passing inert gas to discharge the air at this time, and the printing and dyeing wastewater is allowed to stand for anaerobic treatment for 5 to 15 minutes, so that the azo dyes are degraded into aromatic amines At the same time, the settled sludge at the bottom of the oxidation sedim...

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Abstract

The invention discloses an efficient treatment method for printing and dyeing wastewater, which comprises the following steps: (1) oxidation treatment; (2) primary sedimentation; (3) primary biochemical treatment; (4) secondary biochemical treatment; (5) secondary sedimentation; (6) electrolysis; (7) deep filtration; (8) introducing of wastewater subjected to deep filtration into a clean water basin for cyclic utilization. The efficient treatment method for printing and dyeing wastewater has a novel idea and simple and convenient procedures, is easy to realize, effectively decomposes high-content organic pollutants in printing and dyeing wastewater through three treatment processes, including anaerobic treatment, aerobiotic treatment and electrolysis treatment, radically purifies and recycles the printing and dyeing wastewater and realizes zero emission of printing and dyeing wastewater.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing wastewater treatment, in particular to an efficient treatment method for printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater refers to the wastewater discharged from the pretreatment, dyeing, printing and finishing of cotton, wool, hemp, silk, chemical fiber or blended products. It contains a large amount of complex components such as dyes, sizing agents, and surfactants. It has the characteristics of large chroma, high concentration of organic matter, strong alkalinity, and large changes in water quality and water volume. It is difficult to treat and belongs to difficult-to-treat industrial wastewater. There are four main treatment methods for printing and dyeing wastewater, physical treatment, chemical treatment, biological treatment, and alkali reduction treatment. The existing treatment methods have defects such as high cost, poor treatment...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 周卫根
Owner 常熟新锦江印染有限公司
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