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Oxidation method for treating dye wastewater

A dye wastewater and oxidant technology, which is applied in oxidation water/sewage treatment, mechanical oscillation water/sewage treatment, etc., can solve the problems of poor tolerance of medium and high concentration dye wastewater, unsatisfactory dye wastewater treatment effect, and low adsorption efficiency. Ease of operation, enhanced ring-opening degradation, and enhanced oxidation potential

Inactive Publication Date: 2012-07-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Because dye wastewater contains a large amount of benzene rings and azo compounds, it has become one of the wastewater that is difficult to treat by conventional environmental technologies; the existing methods for treating dye wastewater mainly include Fenton oxidation, wet catalytic oxidation, adsorption and biochemical treatment However, due to the problems of low oxidation potential, low adsorption efficiency, and poor tolerance of bacteria to medium and high concentration dye wastewater in commonly used oxidants, the treatment effect of dye wastewater is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] After mixing the dye wastewater with a concentration of 500mg / L and pH=8 and peroxymonosulfuric acid with a concentration of 0.5mol / L at a molar ratio of 6:1, the oxidation treatment time is 2 hours, and the oxidation treatment temperature is 45°C. Ultrasonic frequency is 40kHz, ultrasonic sound intensity is 10 W / m 2 Oxidation treatment is carried out under certain conditions; the chromaticity of the waste water after degradation can reach the national standard.

Embodiment 2

[0018] After mixing dye wastewater with a dye concentration of 1000mg / L and pH=5 and peroxymonosulfuric acid with a concentration of 2mol / L at a molar ratio of 5:1, the oxidation treatment time is 4 hours and the oxidation treatment temperature is 60°C. Ultrasonic frequency is 80kHz, ultrasonic sound intensity is 15 W / m 2 Oxidation treatment is carried out under certain conditions; the chromaticity of the waste water after degradation can reach the national standard.

Embodiment 3

[0020] After mixing the dye wastewater with a dye concentration of 100mg / L and pH=7 and peroxymonosulfuric acid with a concentration of 0.1mol / L at a molar ratio of 3:1, the oxidation treatment time is 0.5 hours and the oxidation treatment temperature is 30°C , ultrasonic frequency is 100kHz, ultrasonic sound intensity is 5W / m 2 Oxidation treatment is carried out under certain conditions; the chromaticity of the waste water after degradation can reach the national standard.

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Abstract

The invention discloses an oxidation process for treating dye wastewater. In the oxidation process, permonosulphuric acid is used as an oxidant, the 5 to 1,000 mg / L dye wastewater with pH of 1 to 14 is oxidized under synergy of power and ultrasonic, and insoluble organic substances in the dye wastewater are degraded into small molecular acid substances. The process is simple and easy to operate; by adopting the permonosulphuric acid as the oxidant, oxidation potential of more than 2.3V can be provided, and the degradation reaction process is reinforced; and by using the synergy of power and ultrasonic, free hydroxyl radicals can be produced during reaction, oxidation potential can be further improved, and the open loop degradation of the dye compound can be reinforced. By adopting the dyewastewater oxidation process, the chrominance of the degraded wastewater can meet the national standard.

Description

technical field [0001] The invention relates to a process for treating wastewater, in particular to an oxidation process for treating dye wastewater. Background technique [0002] Because dye wastewater contains a large amount of benzene rings and azo compounds, it has become one of the wastewater that is difficult to treat by conventional environmental technologies; the existing methods for treating dye wastewater mainly include Fenton oxidation, wet catalytic oxidation, adsorption and biochemical treatment However, due to the problems of low oxidation potential, low adsorption efficiency, and poor tolerance of bacteria to medium and high concentration dye wastewater in commonly used oxidants, the treatment effect of dye wastewater is not ideal. Contents of the invention [0003] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide an oxidation process for treating dye wastewater, which can effectively degrade dye was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/36
Inventor 李林波洪涛薛娟琴
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY