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Ozonation-precipitation-sulfonated coal filtration-activated carbon filtration treating process for alkali amount-reduction wastewater in printing and dyeing industry

A technology of alkali reduction wastewater and activated carbon filtration, which is applied in the textile industry wastewater treatment, filtration treatment, oxidized water/sewage treatment and other directions, can solve the problems of refractory degradation and high concentration, and achieves large treatment depth, simple process and reduced cost effect

Inactive Publication Date: 2017-02-01
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

[0025] An ozone oxidation-precipitation-sulfonated coal filtration-activated carbon filtration treatment process for alkali reduction wastewater in the printing and dyeing industry, which includes:

[0026] (1) pretreatment of alkali reduction waste water, recovery of terephthalic acid and its salts;

[0027] (2) the waste water after the pretreatment is removed is passed into ozone oxidation treatment;

[0028] (3) adding soluble iron salt to the sewage treated by ozone oxidation to carry out precipitation treatment;

[0029] (4) After the precipitation, the waste water is passed into the sulfonated coal filter equipment;

[0030] (5) The waste water filtered by the sulfonated coal filter equipment is passed into the activated carbon filter equipment to obtain purified water.

Embodiment 2

[0032] An ozone oxidation-precipitation-sulfonated coal filtration-activated carbon filtration treatment process for alkali reduction wastewater in the printing and dyeing industry, which includes:

[0033] (1) pretreatment of alkali reduction waste water, recovery of terephthalic acid and its salts;

[0034] (2) the waste water after the pretreatment is removed is passed into ozone oxidation treatment;

[0035] (3) adding soluble iron salt to the sewage treated by ozone oxidation to carry out precipitation treatment;

[0036] (4) After the precipitation, the waste water is passed into the sulfonated coal filter equipment;

[0037] (5) The waste water filtered by the sulfonated coal filter equipment is passed into the activated carbon filter equipment to obtain purified water.

[0038] (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...

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Abstract

The invention discloses an ozonation-precipitation-sulfonated coal filtration-activated carbon filtration treating process for alkali amount-reduction wastewater in printing and dyeing industry. The treating process comprises the steps of 1, preprocessing the alkali amount-reduction wastewater, recycling terephthalic acid and salt thereof; 2, introducing ozone into the preprocessed wastewater for oxidation; 3, adding soluble ferric salt into the wastewater after being oxidized with ozone for precipitation; 4, introducing the wastewater after precipitation into a sulfonated coal filtration device; 5, introducing the wastewater after being filtered by the sulfonated coal filtration device into a activated carbon filtration device, and treated water is obtained. The treating process can effectively remove ketones, alcohols, organic amine, benzene series, thiophene and a part of organic ester in the wastewater, after continuous operation for six months, the COD removal rate is maintained at 96-99%, the chroma removal rate is maintained at 97-99.9% and the ammonium-nitrogen removal rate is maintained at 93-98%.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an ozone oxidation-precipitation-sulfonated coal filtration-activated carbon 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F9/14C07C51/42C07C63/26C07C63/28C02F103/30C02F101/34C02F101/38C02F101/32
CPCC02F9/00C02F1/001C02F1/28C02F1/52C02F1/78C02F3/32C02F2101/16C02F2101/32C02F2101/322C02F2101/34C02F2101/38C02F2101/40C02F2103/30C02F2301/08C07C51/42C07C63/26C07C63/28
Inventor 张达明
Owner WUXI MINGSHENG TEXTILE MACHINERY
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