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Method for treating catalytic ozone oxidation water

A technology for oxidizing water and ozone, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. It can solve the problems of activated sludge poisoning, inability to treat, and affecting the mineralization of water bodies. Achieve the effect of high ozone utilization rate, solve the inhibition effect, and simple operation

Inactive Publication Date: 2011-07-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although acetic acid is a biodegradable substance, it is often the final product of most chemical oxidation methods, and its oxidation removal directly affects the mineralization degree of water bodies
In fact, high concentration of acetic acid has a certain poisonous effect on activated sludge, which cannot be treated in the actual aerobic process

Method used

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  • Method for treating catalytic ozone oxidation water
  • Method for treating catalytic ozone oxidation water
  • Method for treating catalytic ozone oxidation water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare 500mL of acetic acid solution containing 50mg / L, add acid solution to adjust the pH to 0.5, then add it to the ozone reactor, add 2.5mg of hydrogen peroxide and 0.25mg of Ti 4+ The titanyl sulfate is stirred until the titanyl sulfate is completely dissolved, and ozone is introduced.

[0030]The dosage of ozone is 25mg / min. At the beginning of the experiment, samples were taken for detection after 30 minutes of reaction.

[0031] As a comparison effect, under the same experimental conditions, the experiments of hydrogen peroxide catalyzed ozonation and titanium ion catalyzed ozonation to remove the same concentration of acetic acid were compared.

[0032] Detection method: acetic acid adopts ICS1500 ion chromatography.

[0033] The effect after water sample treatment for 30 minutes is shown in Table 1:

[0034] Table 1

[0035]

Embodiment 2

[0037] Prepare 500mL of acetic acid solution containing 200mg / L, add acid solution to adjust the pH to 2.5, then add it to the ozone reactor, add 200mg of hydrogen peroxide and 50mg of Ti 4+ The titanyl sulfate is stirred until the titanyl sulfate is completely dissolved, and ozone is introduced.

[0038] The dosage of ozone is 100mg / min. At the beginning of the experiment, samples were taken for detection after 30 minutes of reaction.

[0039] As a comparison effect, under the same experimental conditions, the experiments of hydrogen peroxide catalyzed ozonation and titanium ion catalyzed ozonation to remove the same concentration of acetic acid were compared.

[0040] Detection method: acetic acid adopts ICS1500 ion chromatography.

[0041] The effect after water sample treatment for 30 minutes is shown in Table 2:

[0042] Table 2

[0043]

Embodiment 3

[0045] Prepare 500mL of acetic acid solution containing 400mg / L, add acid solution to adjust the pH to 3.5, then add it to the ozone reactor, add 100mg of hydrogen peroxide and 40mg of Ti 4+ The titanyl sulfate is stirred until the titanyl sulfate is completely dissolved, and ozone is introduced.

[0046] The dosage of ozone is 95mg / min. At the beginning of the experiment, samples were taken for detection after 30 minutes of reaction.

[0047] As a comparison effect, under the same experimental conditions, the experiments of hydrogen peroxide catalyzed ozonation and titanium ion catalyzed ozonation to remove the same concentration of acetic acid were compared.

[0048] Detection method: acetic acid adopts ICS1500 ion chromatography.

[0049] The effect after water sample treatment for 10 minutes is shown in Table 3:

[0050] table 3

[0051]

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Abstract

The invention discloses a method for treating catalytic ozone oxidation water. The method comprises the following steps of: (1) adding hydrogen peroxide and Ti4+ containing soluble compounds to waste water which contains organic substances and of which the pH value is adjusted to be between 0.5 and 3.5, and stirring the waste water for complete dissolution to obtain the mixed solution, wherein the organic substances are one or a mixture selected from acetic acid, acetophenone, oxalic acid and methyl benzene, and the mass ratio of charging materials of the organic substances of the H2O2 and the Ti4+ is 1:0.05-2:0.01-0.5; and (2) adding the mixed solution obtained at the step (1) to an ozone reactor, and filling ozone to the ozone reactor for degradation reaction. The method has the advantages of easy operation, high removal rate of organic substances, high utilization ratio of ozone, good economy and feasibility and the like.

Description

(1) Technical field [0001] The invention relates to a method for catalytic ozone oxidation water treatment. (2) Background technology [0002] Since the discovery of ozone in 1785, as a strong oxidant, it has been used in water treatment research for a century. At present, countries such as the United States, Japan and Russia have adopted ozone technology in some wastewater treatment. Although ozone has a strong oxidizing and bactericidal ability, and does not produce secondary pollution itself, it also has obvious disadvantages, that is, it is difficult to completely remove TOC and COD in water during the ozone process. The selectivity of ozone oxidation ability directly limits its popularization and application in the field of water treatment. [0003] Catalytic ozonation technology is a new method to oxidize organic substances that are difficult to be oxidized or degraded by ozone alone under normal temperature and pressure. Catalytic ozonation technology uses a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78C02F101/30C02F101/34C02F101/32
Inventor 童少平张华魏状马淳安刘维屏
Owner ZHEJIANG UNIV OF TECH
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