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Method for treating printing and dyeing wastewater

A technology for printing and dyeing wastewater and a treatment method, which is applied to the treatment of printing and dyeing wastewater and wastewater treatment fields, can solve the problems of only removal rate, complex process and high cost, and achieve the effect of improving the recycling rate and unifying environmental benefits and social benefits.

Inactive Publication Date: 2017-07-28
李聪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The removal of chroma is a major problem in the treatment of printing and dyeing wastewater, and the old biochemical methods have not been satisfactory in terms of decolorization
In addition, the COD caused by chemical slurry such as PAV accounts for a considerable proportion of the total COD of printing and dyeing wastewater, but because they are difficult to be used by microorganisms, the removal rate is only 20%-30%
The existing printing and dyeing wastewater treatment methods are complicated in process and high in cost, and the treatment effect of printing and dyeing wastewater is not good, and the recycling rate is low

Method used

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  • Method for treating printing and dyeing wastewater
  • Method for treating printing and dyeing wastewater
  • Method for treating printing and dyeing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A treatment method for printing and dyeing wastewater, comprising the following steps:

[0018] 1) Grille and screen to remove impurities: First, the rotary grid machine is used to intercept the larger suspended matter in the printing and dyeing wastewater, and the larger suspended matter in the wastewater is picked up by the scooping machine to keep the waste water flowing smoothly, and then pass through The screen intercepts the fine suspended matter in the waste water, picks up the fine suspended matter in the waste water through the fine matter salvage tool, and introduces the waste water behind the screen into the advection grit chamber;

[0019] 2) Grit treatment: the wastewater stays in the advection grit chamber for 2 hours to settle the silt particles, finally remove the silt in the wastewater, and introduce the grit-set wastewater into the flocculation tank;

[0020] 3) Flocculation and sedimentation: Add 72 parts of high-efficiency flocculant to each cubic me...

Embodiment 2

[0030] A treatment method for printing and dyeing wastewater, comprising the following steps:

[0031] 1) Grille and screen to remove impurities: First, the rotary grid machine is used to intercept the larger suspended matter in the printing and dyeing wastewater, and the larger suspended matter in the wastewater is picked up by the scooping machine to keep the waste water flowing smoothly, and then pass through The screen intercepts the fine suspended matter in the waste water, picks up the fine suspended matter in the waste water through the fine matter salvage tool, and introduces the waste water behind the screen into the advection grit chamber;

[0032] 2) Grit treatment: the wastewater stays in the advection grit chamber for 2 hours to settle the silt particles, finally remove the silt in the wastewater, and introduce the grit-set wastewater into the flocculation tank;

[0033] 3) Flocculation and sedimentation: Add 49 parts of high-efficiency flocculant to each cubic me...

Embodiment 3

[0043] A treatment method for printing and dyeing wastewater, comprising the following steps:

[0044] 1) Grille and screen to remove impurities: First, the rotary grid machine is used to intercept the larger suspended matter in the printing and dyeing wastewater, and the larger suspended matter in the wastewater is picked up by the scooping machine to keep the waste water flowing smoothly, and then pass through The screen intercepts the fine suspended matter in the waste water, picks up the fine suspended matter in the waste water through the fine matter salvage tool, and introduces the waste water behind the screen into the advection grit chamber;

[0045] 2) Grit treatment: the wastewater stays in the advection grit chamber for 2 hours to settle the silt particles, finally remove the silt in the wastewater, and introduce the grit-set wastewater into the flocculation tank;

[0046] 3) Flocculation and sedimentation: Add 62 parts of high-efficiency flocculant to each cubic mete...

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Abstract

The invention discloses a processing method for printing and dyeing wastewater, which comprises the following steps: intercepting suspended solids in the printing and dyeing wastewater through a grid machine and a screen; The pond stays for 2 hours for sand settling treatment, and then the wastewater is introduced into the flocculation tank to add flocculant for flocculation treatment. Carry out microbial treatment of wastewater, and then introduce the microbially treated wastewater into the regulating tank, add sodium chlorate and sodium hydroxide to the wastewater, decolorize it and adjust the pH value to make the wastewater clear, and then add activated carbon for deep purification. The clean water is tested for water quality, and then recycled and reused after passing the inspection; the printing and dyeing wastewater treatment method has the characteristics of simple process, convenient operation, low operating cost, good treatment effect and high recycling rate.

Description

technical field [0001] The invention relates to a treatment method for printing and dyeing wastewater, which belongs to the field of wastewater treatment methods. Background technique [0002] Printing and dyeing wastewater is the wastewater discharged from printing and dyeing factories that mainly process cotton, hemp, chemical fibers and their blended products. The amount of printing and dyeing wastewater is relatively large. Each ton of textile printing and dyeing consumes 100 to 200 tons of water, of which 80 to 90% become wastewater. Textile printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. It is one of the most difficult industrial wastewater to treat. Impurities, sand substances, inorganic salts, etc. Printing and dyeing wastewater comes from various processes of production and processing, and the composition of pollutants is also different. The impurit...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/30
CPCC02F9/00C02F1/001C02F1/283C02F1/52C02F1/5236C02F1/56C02F1/66C02F3/28C02F3/34C02F2103/30
Inventor 李聪
Owner 李聪
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