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Application of TiO2 photocatalyst to treatment of printing and dyeing waste water

A printing and dyeing wastewater and photocatalyst technology, which is applied in textile industry wastewater treatment, light water/sewage treatment, special compound water treatment, etc., can solve the problems of low COD removal and unsatisfactory chroma removal, and achieve no secondary pollution , reduce chroma, accelerate the effect of degradation

Inactive Publication Date: 2018-11-02
CHENGDU TEXTILE COLLEGE
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  • Description
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Problems solved by technology

[0003] There are three methods commonly used in the prior art to treat printing and dyeing wastewater, including: ① a biological method that uses microbial metabolism to remove organic matter in wastewater; biological methods have the disadvantages of not being ideal for chroma removal and low COD removal; ② based on Colloid chemistry theory, chemical method using coagulation means; ③ physical method of natural mineral porous material adsorption and membrane separation technology

Method used

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  • Application of TiO2 photocatalyst to treatment of printing and dyeing waste water
  • Application of TiO2 photocatalyst to treatment of printing and dyeing waste water
  • Application of TiO2 photocatalyst to treatment of printing and dyeing waste water

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Embodiment 1-4

[0027] This embodiment provides a TiO 2 Application of photocatalyst in printing and dyeing wastewater treatment: 1g / L photocatalyst TiO 2 Add 50 mg / L of direct acid-resistant scarlet 4BS with pH=2, 3, 9, 10, and react under ultraviolet light at 25°C for 60 min while stirring at a rotation speed of 200 r / min.

Embodiment 5

[0029] This embodiment provides a TiO 2 Application of photocatalyst in printing and dyeing wastewater treatment: 1g / L photocatalyst TiO 2 Add 50mg / L of direct acid-fast scarlet 4BS with pH=2, and react under ultraviolet light at 25°C for 60min while stirring at a rotational speed of 200r / min.

Embodiment 6

[0031] This embodiment provides a TiO 2 Application of photocatalyst in printing and dyeing wastewater treatment: 1g / L photocatalyst TiO 2 Add 50 mg / L of direct acid-fast scarlet 4BS with pH=2, and stir for 60 min at 25° C. at a rotation speed of 200 r / min under ultraviolet light.

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Abstract

The invention belongs to the technical field of waste water treatment and provides application of a TiO2 photocatalyst to treatment of printing and dyeing waste water. According to the application ofthe TiO2 photocatalyst to treatment of printing and dyeing waste water, the photocatalyst TiO2 is added into the printing and dyeing waste water and reaction is conducted under ultraviolet irradiation, wherein the pH of the printing and dyeing waste water is 2 to 3 and 9 to 10. The photocatalyst TiO2 is applied to treatment of the printing and dyeing waste water, so that very excellent decoloringrate and COD removing rate are achieved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular, relates to a TiO 2 Application of photocatalyst in printing and dyeing wastewater treatment. Background technique [0002] The textile industry is one of the important economic sectors of our country. In the textile industry, all kinds of wastewater will be produced, among which the pollution of printing and dyeing wastewater is more serious, and its discharge accounts for about one tenth of the total discharge of industrial wastewater. These wastewaters mainly come from the bleaching, dyeing, printing, finishing and other processes in the printing and dyeing process, and each process produces sewage with different components, which makes the printing and dyeing wastewater complex in composition, high in chroma, rich in toxic substances and seriously pollutes the environment. Therefore, the comprehensive treatment of printing and dyeing wastewater has become an urgen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/72C02F103/30
CPCC02F1/32C02F1/72C02F2103/30C02F2305/10
Inventor 杨东洁刘晓华郑光洪
Owner CHENGDU TEXTILE COLLEGE
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