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Method for reducing generation amount of bromate in ozone water treatment process through catalysis of Ce-MCM-48

A ce-mcm-48, treatment process technology, applied in the field of catalytic reduction of bromate generation potential, can solve the problems of pipe network corrosion and low efficiency of bromate generation

Inactive Publication Date: 2011-11-09
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low efficiency of reducing bromate generation by introducing chemical agents in the current drinking water ozonation reaction process, causing pipe network corrosion, and producing toxic substances, etc., and provides a solid Phase reduction method of bromate formation potential

Method used

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  • Method for reducing generation amount of bromate in ozone water treatment process through catalysis of Ce-MCM-48
  • Method for reducing generation amount of bromate in ozone water treatment process through catalysis of Ce-MCM-48
  • Method for reducing generation amount of bromate in ozone water treatment process through catalysis of Ce-MCM-48

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Embodiment 1

[0018] After the traditional water treatment process (coagulation, sedimentation, filtration, etc.), the filtered water enters the ozone contact tower (or pool) to contact with ozone and simultaneously undergoes Ce-MCM-48 catalytic oxidation for 2 to 5 minutes, and the ozone dosage is 0.2 ~4.0mgO 3 / (mgTOC), this process completes ozone dosing and partial catalytic oxidation; 2. The effluent enters the oxidation tank and is catalyzed and oxidized by Ce-MCM-48 for 8-10 minutes to complete the effective reduction control of organic matter oxidation and bromate generation. See the attached drawings for the specific process figure 1 shown.

Embodiment 2

[0020] The difference from the above method 1 is that the filtered water enters the ozone contact tower for ozone aeration for 2 to 5 minutes, and the ozone dosage is 0.2 to 4.0 mgO 3 / (mg TOC); The ozone-containing water from the ozone contact tower enters the oxidation tank filled with Ce-MCM-48 finished catalyst, and the catalytic oxidation time is controlled to be 8-10 minutes. See the attached drawings for the specific process figure 2 shown.

Embodiment 3

[0022] The difference from the above-mentioned method 1 is that the filtered water enters the integrated contact reaction tank filled with Ce-MCM-48 finished catalyst to perform ozone aeration and catalytic reaction at the same time. The reaction time is 10-15 minutes, and the ozone dosage is 0.2 ~4.0mgO 3 / (mg TOC). See the attached drawings for the specific process image 3 shown.

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Abstract

The invention relates to a method for reducing the generation amount of bromate in the ozone water treatment process through catalysis of Ce-MCM-48. In the method, the generation amount of the bromate is greatly reduced by introducing a Ce-MCM-48 mesoporous molecular sieve forming catalyst in the ozone oxidation water treatment process. Filtered water which is subjected to treatment (coagulation, precipitation, filtration and the like) in the traditional water treatment process enters an ozone contact column and subjected to ozone aeration for 2 to 5 minutes, and water containing ozone enters a Ce-MCM-48 catalytic oxidation tank; or the filtered water is subjected to ozone aeration and Ce-MCM-48 catalytic reaction simultaneously. The Ce-MCM-48 mesoporous molecular sieve catalyst is prepared by synthesizing through hydro-thermal reaction, washing and roasting. The method has high efficiency for reducing the generation amount of the bromate. The Ce-MCM-48 forming catalyst has an effect of promoting ozone to oxidize organic matters.

Description

technical field [0001] The invention relates to a method for reducing the generation potential of bromate in the process of ozonation, in particular to a method for catalytically reducing the generation potential of bromate when using a Ce-MCM-48 mesoporous molecular sieve catalyst to oxidize water containing bromide ions. Background technique [0002] In recent years, due to the higher and higher requirements for drinking water quality, more and more surface water plants use ozone as drinking water oxidation and decontamination measures. Surface water containing bromide ions can produce harmful bromine-containing by-products under ozonation conditions. Bromide ions in water will be oxidized to hypobromous acid during the ozone oxidation process, and hypobromous acid will be further oxidized to bromate. Bromate is designated as a 2B carcinogen by the International Agency for Research on Cancer. The drinking water standards of developed countries and the water quality standa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F101/12
Inventor 强志民陆晓巍张涛
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI