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Advanced oxidation method for treatment of dye waste water

A dye wastewater, advanced oxidation technology, applied in the direction of oxidation water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of low pH value, secondary pollution, high sludge production, etc.

Inactive Publication Date: 2004-11-17
WUHAN UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. High requirements for reaction conditions: higher COD removal rate requires excess hydrogen peroxide, ferrous ions, especially lower pH value
[0006] 2. High sludge yield: Since there must be a relatively excessive amount of ferrous ions during the reaction, ferric hydroxide (Fe(OH) will be produced at the end of the reaction 3 ) sludge, in addition to the need for further treatment and disposal of these sludge, and will cause secondary pollution
[0007] 3. High operating cost: Adding excess hydrogen peroxide and ferrous ions to the wastewater makes the operating cost high
Subsequent sludge treatment costs are high

Method used

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  • Advanced oxidation method for treatment of dye waste water
  • Advanced oxidation method for treatment of dye waste water

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Embodiment

[0035] Example: In this example, other conditions are the same as those of the comparative example, after adding ultrasound, it is found that the COD removal rate of the two kinds of dye wastewater under the same time condition is about 20% higher than that without ultrasound. It can be seen that the present invention utilizes the strengthening effect of ultrasound to increase the mass transfer rate of reactants and chemical regeneration, thereby improving the COD removal rate of dye wastewater. The detailed operating conditions and processing results are as follows:

[0036] 1. Operating conditions:

[0037] Dye wastewater volume: 100mL

[0038] pH: 3

[0039] Ultrasonic conditions: 20kHz, 150W

[0040] Orange II dye wastewater: initial concentration of 100mg / L, Fe 2+ Ion concentration is 10mg / L, H 2 o 2 The concentration is 100mg / L

[0041] Reactive black K-BR dye wastewater: initial concentration is 400mg / L, Fe 2+ Ion concentration is 50mg / L, H 2 o 2 The concentra...

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Abstract

The invention discloses a high-level oxidization method for treating dyestuff waste water, which realizes dyestuff waste water decoloration through the Fenton method, characterized in that after throwing H2O2 and FeSO4 into dyestuff waste water, supersonic wave oscillation is carried out to the mixing liquid. The invention realizes high efficiency under the condition of equal COD removing ratio, in particular less hydrogen dioxide solution, ferrous iron ions and acid are consumed, thus minimizing sludge output and reducing the cost.

Description

technical field [0001] The invention relates to a wastewater advanced oxidation treatment method, which is a method for treating dye wastewater by using ultrasonic waves to strengthen Fenton reagent. After the addition of ultrasound, the collapse of cavitation bubbles is accompanied by strong shock waves and micro-jet phenomena, resulting in local severe turbulence, thereby strengthening the mass transfer rate of homogeneous and heterogeneous systems, so that · OH radicals can react with dye molecules in time. Thereby greatly improving the COD removal rate of dye wastewater. Background technique [0002] The principle of treatment of dye wastewater by Fenton reagent alone is Fe 2+ ion-catalyzed decomposition of H 2 o 2 produce · OH radicals: [0003] <chemistry num="001"> <chem file="200310111518_cml001.xml" / > < / chemistry> [0004] Then by · OH radicals oxidize organic matter. because · OH radicals have strong oxidizing properties, and this me...

Claims

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Application Information

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IPC IPC(8): C02F1/36C02F1/58C02F1/72
CPCC02F2305/026C02F1/722C02F2101/308C02F1/36C02F1/725
Inventor 张晖王正琪张翼吴峰
Owner WUHAN UNIV
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