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Process for water supply deep treatment of catalyzing ozone oxydation by hydroxy ferric oxide as catalyst

A technology of iron oxyhydroxide and ozone oxidation, which is applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc. It can solve the problems of low ozone oxidation ability and increased local concentration, and achieve energy saving and improvement High removal rate and catalytic efficiency

Inactive Publication Date: 2006-09-20
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem of low ozone oxidation ability in the prior art, the present invention provides a method for advanced treatment of feedwater with catalytic ozonation using iron oxyhydroxide as a catalyst. Iron oxyhydroxide can promote the decomposition of ozone in water to generate more hydroxyl radicals, Its certain enrichment effect on organic matter will increase the local concentration of reactants, and its catalytic ozonation of organic matter in water is a water treatment method that can improve the ability of ozone oxidation

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  • Process for water supply deep treatment of catalyzing ozone oxydation by hydroxy ferric oxide as catalyst
  • Process for water supply deep treatment of catalyzing ozone oxydation by hydroxy ferric oxide as catalyst
  • Process for water supply deep treatment of catalyzing ozone oxydation by hydroxy ferric oxide as catalyst

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specific Embodiment approach 1

[0007] Specific implementation mode one: see figure 1 , this embodiment is carried out according to the following steps: a. After the traditional water treatment processes such as coagulation, precipitation, and filtration, the filtrated water enters the ozone contact tower for ozone oxidation reaction, and the initial concentration of ozone in the water is controlled to be 0.5 to 1.0 mg O 3 / mg TOC, the residence time of water in the ozone contact tower is 10 to 20 minutes; b, the water coming out from the ozone contact tower enters the catalyst bed filled with ferric oxyhydroxide or carrier-type ferric oxyhydroxide to control the water in The residence time in the catalyst bed is 10 to 30 minutes; c, the oxidized water enters the biological activated carbon filter bed, and the residence time of the water in the biological activated carbon filter bed is controlled to be 10 to 20 minutes to further remove the organic matter in the water; d, The water that removes organic matte...

specific Embodiment approach 2

[0010] Specific implementation mode two: see figure 2 The difference between this embodiment and the specific embodiment one is that the steps a and b are: a, the filtered water after coagulation, sedimentation, filtration and other traditional water treatment processes enters the interior filled with iron oxyhydroxide or carrier-type hydroxyl The ozone contact tower with iron oxide catalyst catalyzes the ozone oxidation reaction, and the initial concentration of ozone in water is controlled to be 0.5-1.0mg O 3 / mg TOC, the residence time of water in the ozone contact tower is 10 to 30 minutes; b, the water after catalytic ozonation enters the remaining ozone reactor to remove the remaining ozone in the water. Other steps and process conditions are the same as those in Embodiment 1.

specific Embodiment approach 3

[0011] Specific implementation mode three: see image 3 The difference between this embodiment and the specific embodiment 1 is that step a adopts the multi-stage ozone oxidation method to control the final effluent of the multi-stage ozone contact tower to contain 0.3-0.8 mg / L of ozone. Other steps and process conditions are the same as the specific embodiment One is the same. A part of organic matter in water is easy to be oxidized by ozone alone, and fully exerting the ability of ozone to directly oxidize organic matter can save the amount of ozone and achieve a better effect of removing organic matter. This embodiment is beneficial to give full play to the oxidation ability of ozone, save the dosage of ozone, and achieve a better effect of removing organic matter.

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Abstract

The invention is a drinking water advanced treatment method by ozone oxidation with iron oxide hydroxide as catalyst, relating to a drinking water treatment process of eliminating organic substances by ozone oxidation catalyzed by solid catalyst. The surface water is processed by coagulation, deposition, filtration, etc, and enters in an ozone contact tower, a catalyst bed, and a bio-activated carbon filter bed in turn to eliminate the organic substances, and finally enters in the network pipe after sterilized. The catalyste has the advantages of high catalyzing efficiency and completely weak digestion of metallic ions. The invention adopts a drinking water treatment process combining catalytic ozone oxidation and bio-activated carbon, improving the ability of ozone oxidation to eliminate organic substance in the water, the biochemical degrability of organic substances in the water, and ozone utilization ratio, and also helps eliminate metallic ions in the water. It has the advantages of low cost and high oxidizing efficiency.

Description

technical field [0001] The invention relates to a water supply treatment process for removing organic matter in water by catalyzing ozone oxidation with a solid catalyst, in particular to a water supply treatment process for removing organic matter in water by catalytic ozonation oxidation using iron oxyhydroxide as a catalyst. Background technique [0002] In recent years, due to continuous industrial and agricultural pollution, a large number of toxic and harmful organic pollutants that are difficult to degrade have entered water bodies, resulting in the deterioration of water quality. According to relevant reports at home and abroad, these organic pollutants can hardly be removed in conventional water treatment processes. In addition, due to soil erosion, the content of natural organic matter in water sources increases, and natural organic matter is the precursor of the by-products of drinking water chlorination disinfection. Conventional water treatment processes have li...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F9/02B01J23/745C02F1/78C02F1/52C02F3/00
Inventor 马军张涛陈忠林
Owner HARBIN INST OF TECH
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