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Method for regeneration treatment of industrial waster water treating water

A technology for industrial sewage and water treatment, applied in flotation water/sewage treatment, neutralized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of low investment and poor treatment effect, and achieve low investment cost , Reduce chromaticity, good effect of air flotation separation

Inactive Publication Date: 2009-12-23
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the flocculation-sedimentation method is a water treatment process with simple process, low investment and stable operation, it is widely used in advanced sewage treatment, but the treatment effect of this method is poor

Method used

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  • Method for regeneration treatment of industrial waster water treating water

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Comparison scheme
Effect test

Embodiment 1

[0020] A method for recycling industrial sewage treatment water: the main water quality index of industrial sewage treatment water is: COD Cr It is 90~120mg / L, and the chromaticity is 500~700 degrees. The technological process for treating the industrial sewage treatment water is as follows: figure 1 Shown:

[0021] First, adjust the pH value of the industrial sewage treatment water entering the adjustment tank to 5-6; the industrial sewage treatment water after adjusting the pH value enters the flocculation reactor, and polyaluminum chloride, cetyltrimethylammonium bromide and starch Grafted polyacrylamide is added to the flocculation reactor at the same time, and stirred at 15-20°C for 2-5 minutes to carry out the flocculation decolorization reaction; the industrial sewage treatment water after the flocculation decolorization reaction enters the air flotation separation tank, and the flotation is removed by a slag scraper. The floc scum on the liquid surface of the air flo...

Embodiment 2

[0026] A method for recycling industrial sewage treatment water: the main water quality index of industrial sewage treatment water is: COD Cr It is 120-160mg / L, and the chromaticity is 700-900 degrees. The technological process for treating the industrial sewage treatment water is as follows: figure 1 Shown:

[0027] First, adjust the pH value of the industrial sewage treatment water entering the adjustment tank to 6-7; the industrial sewage treatment water after adjusting the pH value enters the flocculation reactor, and polyaluminum chloride, cetyltrimethylammonium bromide and starch Grafted polyacrylamide is added to the flocculation reactor at the same time, and stirred at 20-25°C for 5-8 minutes to carry out the flocculation and decolorization reaction; the industrial sewage treatment water after the flocculation and decolorization reaction enters the air flotation separation tank, and the flotation is removed by a slag scraper. The floc scum on the liquid surface of th...

Embodiment 3

[0032] A method for recycling industrial sewage treatment water: the main water quality index of industrial sewage treatment water is: COD Cr It is 160-200mg / L, and the chromaticity is 900-1100 degrees. The technological process for treating the industrial sewage treatment water is as follows: figure 1 Shown:

[0033] First, adjust the pH value of the industrial sewage treatment water entering the adjustment tank to 5-6; the industrial sewage treatment water after adjusting the pH value enters the flocculation reactor, and polyaluminum chloride, cetyltrimethylammonium bromide and starch Grafted polyacrylamide is added to the flocculation reactor at the same time, and stirred at 25-30°C for 8-10 minutes to carry out the flocculation decolorization reaction; the industrial sewage treatment water after the flocculation decolorization reaction enters the air flotation separation tank, and the flotation is removed by a slag scraper. The floc scum on the liquid surface of the air ...

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Abstract

The invention relates to a method for regeneration treatment of industrial waster water treating water. The method comprises the following steps: firstly, pH valve of industrial waster water treating water entering into an adjusting tank is adjusted to 5 to 7; industrial waster water treating water, pH valve of which is adjusted, enters into a flocculation reactor; aluminium polychlorid, hexadecyl trimethyl ammonium bromide and starch-graft-polyacrylamide are simultaneously added into the flocculation reactor and are stirred for 2 to 10min in the temperature of 15 to 30 DEG C for flocculation decolorization reaction; industrial waster water treating water which is processed by flocculation decolorization reaction enters into an air-flotation separation cell, and then enters into a centrifugal machine for dehydration after a sediment scraper scrape out floc dross floating on the air-flotation separation cell; dehydrated floc dross is dehydrated by a pressure filter to form a filter cake; processed industrial waster water treating water can be used for dissolved-air water of the air-flotation separation cell and industrial water of regenerated water to be recycled. The method causes that COD of processed industrial waster water treating water is less than or equal to 60 Mg / L, chromacity is less than or equal to 30 degrees, thus achieving water quality standard of industrial water of regenerated water.

Description

technical field [0001] The invention belongs to the technical field of industrial sewage treatment. Specifically, it relates to a method for industrial sewage treatment water regeneration treatment. Background technique [0002] At present, industrial sewage treatment generally adopts the process of biochemical treatment + physical and chemical treatment, and the effluent water quality can meet the corresponding national discharge standards for discharge into surface water bodies, but the COD of industrial sewage effluent after secondary treatment Cr And chromaticity still can't reach the water quality standard of recycled water industry water. [0003] With my country's emphasis on the utilization of recycled water for enterprises and the development of circular economy and the requirement to achieve zero discharge, an industrial sewage regeneration treatment technology is very meaningful for realizing a virtuous cycle of water ecology and sustainable utilization of water ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F1/52C02F1/24C02F11/12
Inventor 王光华吴朝阳李文兵梁玉河李笑原
Owner WUHAN UNIV OF SCI & TECH
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