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Method for treating organic pigment waste water

A technology of organic pigments and treatment methods, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as failure to meet discharge standards, large acid consumption, etc. The effect of small area, low operating cost and simple management

Inactive Publication Date: 2012-08-15
SHANGHAI WINNER ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is only suitable for quinacridone pigment wastewater, and the amount of acid used is large. Subsequent biochemical treatment is required to meet the national secondary discharge standard, and it cannot meet the national single discharge standard.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Treatment of azo pigment wastewater with a TOC (total organic carbon) concentration of 360mg / L:

[0029] (1) Step 1: Preprocessing

[0030] Use NaOH to adjust the pH value of the wastewater to 8.5, add decolorizing agent polyferric sulfate 220mg / L, activated carbon powder 210mg / l, and anionic polyacrylamide (molecular weight 13 million) 4.0mg / l. to obtain pretreated wastewater;

[0031] (2) Step 2: resin adsorption and desorption

[0032] After the pretreated wastewater in step (1) is separated from liquid to solid, the liquid is sent to a macroporous resin adsorption column for adsorption;

[0033] The macroporous adsorption resin is WR61 type macroporous adsorption resin produced by American DOW Chemical, the adsorption rate is 4BV / h, and the adsorption cycle is 24h. The processing capacity per cycle is 96BV, and the adsorption temperature is normal temperature.

[0034] The desorption agent is 3% potassium hydroxide aqueous solution + 1% ethanol aqueous solution (...

Embodiment 2

[0038] Treatment of 2-B-P organic pigment wastewater with a TOC concentration of 480mg / L:

[0039] (1) Using Na 2 CO 3 Adjust wastewater pH to 8.0, add decolorizer polyaluminum chloride 460mg / L, activated carbon powder 560mg / l, cationic polyacrylamide (molecular weight 11 million) 2.0mg / l., obtain pretreated wastewater;

[0040] (2) After the pretreated wastewater in step (1) is separated from liquid to solid, the liquid is sent into a macroporous resin adsorption column for adsorption;

[0041] The macroporous adsorption resin is H1020 macroporous adsorption resin produced by Nankai University Chemical Plant. The adsorption rate is 2BV / h, the regeneration cycle is 16h, and the cycle treatment capacity is 32BV. Wastewater temperature: normal temperature.

[0042] The desorbent uses 4% sodium hydroxide aqueous solution + 2% ethanol aqueous solution (weight percentage, desorption time 2.5h, analysis temperature: 80 ℃.

[0043] Using GB11914-89, HJ 501-2009 analysis standard ...

Embodiment 3

[0046] Treatment of phthalocyanine organic pigment wastewater with a TOC concentration of 1210mg / L:

[0047] (1) Use NaOH to control the pH of the wastewater to be 7.5, add the decolorizing agent polyaluminum iron 280mg / L, activated carbon powder 420mg / l, and cationic polyacrylamide (molecular weight: 13 million) 1.0mg / l. to obtain pretreated wastewater;

[0048] (2) After the pretreated waste water of step (1) is separated from liquid to solid, the liquid is sent into a resin adsorption column for adsorption;

[0049] The macroporous adsorption resin is XAD-4 type macroporous adsorption resin produced by DOW Chemical in the United States. The adsorption rate is 3BV / h, the regeneration cycle is 12h, and the cycle treatment capacity is 36BV. Wastewater temperature: normal temperature.

[0050] The desorbent uses 4% sodium hydroxide aqueous solution + 1% ethanol aqueous solution (weight percentage, desorption time 2.0h, analysis temperature: 80 ℃.

[0051] Using GB11914-89, HJ...

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Abstract

The invention provides a method for treating organic pigment waste water, wherein the method comprises the following steps of: (1) regulating pH of waste water within 7-10.5, and adding a decoloring agent, activated carbon powder and polypropylene; (2) treating a clear liquid of the pretreated waste water after air floatation or sediment in a resin absorption column, wherein resin is selected from nonpolar macroporous adsorption resin provided with a porous framework structure and formed through the mutual cross-linking polymerization by taking styrene or acrylic ester as a monomer, divinylbenzene as a cross-linking agent, and toluene or dimethylbenzene as porogen. According to the method provided by the invention, waste water is not required to be diluted and is directly processed; the treating and reaction time of waste water is short, and the total retention time of the pretreatment and the resin absorption is less than 10 hours; the occupation area is small; biochemical bacteria are not required for the running and starting of the system; the running and starting are quick; the management is simple; the resin after absorption can be reused; the operation cost is low; and the yielding water is superior to first level discharge standard stipulated by Integrated Waste Water Discharge Standard of People's Republic of China (GB8978-1996).

Description

technical field [0001] The invention relates to the technical field of organic pigment wastewater treatment, in particular to an organic pigment wastewater treatment method utilizing an adsorption resin. Background technique [0002] Organic pigments refer to a class of pigments composed of organic compounds that have color and a series of other pigment properties. With the rapid development of the pigment industry, my country's water environment has been seriously polluted. [0003] The production wastewater of organic pigments is difficult to be treated by conventional treatment methods due to its high CODcr, high chroma, high salt content, difficult biodegradation of organic matter, coupled with intermittent discharge of wastewater, and large changes in water quality and quantity over time. At present, the main methods for treating this kind of wastewater at home and abroad are: activated carbon adsorption, biodegradation, ion exchange, solvent extraction, membrane separ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 张建鹏钟丽云杨晓玲
Owner SHANGHAI WINNER ENVIRONMENTAL TECH
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