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Ozonation-sediment-sand filtering-coal ash/slag filtering treatment process for alkali peeling wastewater in printing and dyeing industry

A technology of alkali reduction wastewater and ozone oxidation, which is applied in textile industry wastewater treatment, oxidation water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high concentration and refractory degradation, and achieve cost saving and realization The effect of waste recycling

Inactive Publication Date: 2017-03-22
WUXI MINGSHENG TEXTILE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the corrosion of the outer fiber by alkali, the polyester fiber becomes thinner and softer after reduction, resulting in a silk-like soft feel and elegant feeling, but the reduction of polyester also brings high concentration, high alkalinity, and difficult to degrade Organic Wastewater - Alkali Mineral Wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An ozone oxidation-precipitation-sand filtration-fly ash / slag filtration treatment process for alkali reduction wastewater in the printing and dyeing industry, which includes:

[0025] (1) pretreatment of alkali reduction waste water, recovery of terephthalic acid and its salts;

[0026] (2) the waste water after the pretreatment is removed is passed into ozone oxidation treatment;

[0027] (3) adding soluble iron salt to the sewage treated by ozone oxidation to carry out precipitation treatment;

[0028] (4) After the precipitation, the waste water is passed into the sand filter equipment for filtration treatment;

[0029] (5) Pass the sand-filtered waste water into the fly ash / slag filter equipment to obtain purified water.

Embodiment 2

[0031] An ozone oxidation-precipitation-sand filtration-fly ash / slag filtration treatment process for alkali reduction wastewater in the printing and dyeing industry, which includes:

[0032] (1) pretreatment of alkali reduction waste water, recovery of terephthalic acid and its salts;

[0033] (2) the waste water after the pretreatment is removed is passed into ozone oxidation treatment;

[0034] (3) adding soluble iron salt to the sewage treated by ozone oxidation to carry out precipitation treatment;

[0035] (4) After the precipitation, the waste water is passed into the sand filter equipment for filtration treatment;

[0036] (5) Pass the sand-filtered waste water into the fly ash / slag filter equipment to obtain purified water.

[0037] (6) Pass the purified water obtained into the plant treatment pool for purification. Plants such as reeds, duckweeds, and lotus roots are planted in the plant treatment pool, and the purified water flows slowly in the plant treatment po...

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PUM

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Abstract

The invention discloses an ozonation-sediment-sand filtering-coal ash / slag filtering treatment process for alkali peeling wastewater in printing and dyeing industry. The treatment process comprises the following steps: (1) pre-treating alkali peeling wastewater and recycling terephthalic acid and salt thereof; (2) introducing ozone into the pretreated wastewater and performing ozonation treatment; (3) adding a soluble ferric salt into the wastewater after the ozonation treatment and performing sediment treatment; (4) after the sediment treatment, and introducing the wastewater into a sand filtering device so as to perform the filtering treatment; (5) introducing the wastewater after the sand filtering treatment into a coal ash / slag filtering device, thereby obtaining the purified water. According to the treatment process disclosed by the invention, ketones, alcohols, organic amine, benzene series, thiophene and some organic esters in the wastewater can be effectively removed. After a half year of continuous running, the COD removal rate is remained at 96-99%, the chroma removing rate is remained at 97-99.9% and the ammonium-nitrogen removal rate is remained at 93-98%.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an ozone oxidation-precipitation-sand filtration-fly ash / slag filtration treatment process for alkali reduction wastewater in the printing and dyeing industry. Background technique [0002] Printing and dyeing is a traditional characteristic industry in my country. In recent years, it has developed rapidly in Jiangsu, Zhejiang, Guangdong and coastal areas. However, the pollution caused by printing and dyeing wastewater has become increasingly prominent with the expansion of the industrial scale. The printing and dyeing industry is a large discharge of industrial wastewater. According to incomplete statistics, the daily discharge of printing and dyeing wastewater in my country is about 3×10 6 ~4×10 6 m 3 . [0003] In recent years, the share of polyester chemical fiber in the textile market has been increasing. In 1991, my country's polyester output was 1.015 milli...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/32C02F101/34C02F103/30
CPCC02F9/00C02F1/001C02F1/283C02F1/52C02F1/78C02F3/32C02F2101/32C02F2101/34C02F2103/30
Inventor 张达明
Owner WUXI MINGSHENG TEXTILE MACHINERY