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Deep treatment method for up-to-standard printing and dying industry wastewater

A technology for advanced treatment of printing and dyeing wastewater, applied in the field of water pollution treatment, can solve the problems of additional reagent input, no progress in advanced treatment research, and high energy consumption

Inactive Publication Date: 2012-07-04
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although traditional physical and chemical methods can make printing and dyeing wastewater discharge up to standard, there has been no progress in the research on advanced treatment. Although the emerging advanced oxidation method in recent years can achieve basic complete decolorization and degradation (decolorization rate can reach 99%, degradation rate can reach 97%), but there are problems of high energy consumption and the need for additional reagent input

Method used

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  • Deep treatment method for up-to-standard printing and dying industry wastewater
  • Deep treatment method for up-to-standard printing and dying industry wastewater
  • Deep treatment method for up-to-standard printing and dying industry wastewater

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0013] First, draw 10mL of simulated printing and dyeing wastewater (prepared from monoazo dye Acid Bright Yellow) and place it in a lower medium glass dish (wastewater depth is 0.1cm), shake it evenly.

[0014] Then, adjust the discharge parameters of the dielectric barrier discharge low-temperature plasma discharge device as follows: the working gas is air at normal pressure, and the discharge power is 0.175W / cm 2 , the dielectric distance is 5mm; after 2 minutes of discharge, the chromaticity value and COD value of the original solution can be reduced by 97%, and the discharge time of 150 seconds can make the dye solution achieve complete decolorization (absorbance at the maximum wavelength is 0) and complete degradation (COD value is 0). And the output of sludge in the discharge process is 0mg. Among them, the measurement method of chromaticity value is determined by spectrophotometry, the decolorization rate is calculated by formula 1, the measurement method of COD value...

experiment example 2

[0024] First, draw 100mL of simulated printing and dyeing wastewater (prepared directly from disazo dye pink) and place it in a lower medium glass dish (wastewater depth 1cm), shake it evenly.

[0025] Then, adjust the discharge parameters of the dielectric barrier discharge low-temperature plasma discharge device as follows: the working gas is air at normal pressure, and the discharge power is 1.364W / cm 2 , the dielectric distance is 5mm; after 4 minutes of discharge, the chromaticity value and COD value of the original solution can be reduced by 96.73%, and the discharge time of 5 minutes can make the dye solution achieve complete decolorization (absorbance at the maximum wavelength is 0) and complete degradation (COD value is 0). And the output of sludge in the discharge process is 0.01mg.

experiment example 3

[0027] First, draw 10mL of simulated printing and dyeing wastewater (prepared from trisazo dye monocyclic direct golden camel) and place it in a lower medium glass dish (wastewater depth is 0.1cm), shake it evenly.

[0028] Then, adjust the discharge parameters of the dielectric barrier discharge low-temperature plasma discharge device as follows: the working gas is air at normal pressure, and the discharge power is 1.364W / cm 2 , the dielectric distance is 5mm; the dye solution can be completely decolorized (the absorbance at the maximum wavelength is 0) and completely degraded (the COD value is 0) after 2 minutes of discharge. And the output of sludge in the discharge process is 0mg.

[0029] Experimental examples 1-3 show that dielectric barrier discharge low-temperature plasma can make advanced treatment of printing and dyeing wastewater that has reached the standard in a short period of time, and achieve the purpose of reducing sludge discharge during the advanced treatmen...

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Abstract

The invention relates to the field of water environment pollution treatment and discloses a deep treatment method for up-to-standard printing and dying industry wastewater, which is based on a dielectric barrier discharge low-temperature plasma discharge device, and the dielectric barrier discharge low-temperature plasma discharge device can generate a low-temperature plasma environment with the temperature of 10 DEG C to 50 DEG C. The method is characterized that: an open container containing printing and dying industry wastewater coming up to the national first-grade discharge standard is placed in the low-temperature plasma environment with the temperature of 10 DEG C to 50 DEG C to carry out decolorization and degradation, wherein the depth of the printing and dying industry wastewater is 0.1cm to 1cm, the input power of the dielectric barrier discharge low-temperature plasma discharge device corresponding to each square centimeter of water surface is 0.175W to 1.364W, and the time of decolorization and degradation is 3 to 5 minutes.

Description

technical field [0001] The invention relates to the field of water environment pollution treatment, in particular to an advanced treatment method for up-to-standard printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater has a complex structure, a wide variety, and a huge amount, and is widely found in textile materials, chemical fibers, paper, leather, food, medicine, cosmetics, and even skin dyeing. It is an important component of organic wastewater in the environmental field. An important source of water pollution. [0003] Although traditional physical and chemical methods can make printing and dyeing wastewater discharge up to standard, there has been no progress in the research on advanced treatment. Although the emerging advanced oxidation method in recent years can achieve basic complete decolorization and degradation (decolorization rate can reach 99%, degradation rate can reach 97%), but there are problems of high energy consum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/48C02F103/30
Inventor 陈杰瑢赵菁
Owner XI AN JIAOTONG UNIV
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