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

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Problems solved by technology

Although the flocculation-sedimentation method is a water treatment process with simple process, low investment an

Method used

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  • Method for regeneration treatment of industrial waster water treating water

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Example Embodiment

[0019] Example 1

[0020] A method of industrial wastewater treatment water regeneration treatment: the main water quality index of industrial wastewater treatment water: COD Cr It is 90-120mg / L, and the chromaticity is 500-700 degrees. The process flow for treating the industrial sewage treatment water is as 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 the polyaluminum chloride, cetyltrimethylammonium bromide and starch The grafted polyacrylamide was added to the flocculation reactor at the same time, and the flocculation and decolorization reaction was carried out by stirring for 2~5min at 15~20℃; the industrial sewage treatment water after the flocculation and decolorization reaction enters the air flotation separation tank, and the floatation The flocculate scum on the liquid surface of the ...

Example Embodiment

[0025] Example 2

[0026] A method of industrial sewage treatment water regeneration treatment: the main water quality index of industrial sewage treatment water: COD Cr It is 120-160mg / L, and the color is 700-900 degrees. The process flow for treating the industrial sewage treatment water is as 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 the polyaluminum chloride, cetyltrimethylammonium bromide and starch The grafted polyacrylamide was added to the flocculation reactor at the same time, and stirred at 20~25℃ for 5~8min for flocculation and decolorization reaction; the industrial sewage treatment water after the flocculation and decolorization reaction enters the air flotation separation tank, and the floatation The flocculate scum on the liquid surface of the air flotation separation tank is s...

Example Embodiment

[0031] Example 3

[0032] A method of industrial wastewater treatment water regeneration treatment: the main water quality index of industrial wastewater treatment water: COD Cr It is 160-200mg / L, and the chromaticity is 900-1100 degrees. The process flow for treating the industrial sewage treatment water is as 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 the polyaluminum chloride, cetyltrimethylammonium bromide and starch The grafted polyacrylamide was added to the flocculation reactor at the same time, and the flocculation and decolorization reaction was carried out by stirring for 8-10min at 25-30℃; the industrial sewage treatment water after the flocculation and decolorization reaction enters the air flotation separation tank, and the floatation is removed by a scraper. The flocculate scum o...

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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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