Gradient Ozone Catalytic Oxidation Method for Degrading Organic Pollutants in Water

A technology for ozone catalytic oxidation and organic pollutants, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problem of inability to efficiently remove organic pollutants in water, pH value and temperature. To achieve the effect of inhibiting the formation of chlorine disinfection by-products, reducing toxicity and reducing CT value

Active Publication Date: 2011-12-14
哈尔滨工投环保产业有限公司
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Problems solved by technology

[0014] The purpose of the present invention is to solve the problem that the existing advanced oxidation technology, when used alone, cannot efficiently remove organic pollutants in water, is greatly affected by the pH value and temperature of the water body, and will produce more toxic by-products Problem, the present invention provides a method for gradient ozone catalytic oxidation to degrade organic pollutants in water, which can efficiently and safely degrade organic pollutants in water

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  • Gradient Ozone Catalytic Oxidation Method for Degrading Organic Pollutants in Water

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specific Embodiment approach 1

[0029] Specific Embodiment 1: This embodiment is a method for gradient ozone catalytic oxidation to degrade organic pollutants in water. It is to sequentially combine two or three of the following three treatment methods, and use the gradient change of ozone concentration to affect the water body. Realized by oxidation treatment, the first treatment method is O 3 processed separately, the second processing method is O 3 Enhanced catalytic oxidation process; the third treatment method is O 3 / UV process;

[0030] Among them, the first processing method O 3 The treatment method for separate treatment is: adding O to the water body 3 treatment to control the O dosage in the water body 3 The concentration of water is 0.5~30mg / L, and the water retention time is 0.5~30min;

[0031] The second treatment method O 3 The treatment method of the enhanced catalytic oxidation process is: adding O to the water body 3 , and adding O 3 at the same time or add O 3 Afterwards, strength...

specific Embodiment approach 2

[0038] Embodiment 2: This embodiment differs from Embodiment 1 in that the water body is drinking water, sewage secondary sedimentation tank effluent, groundwater, seawater, reused reclaimed water, industrial water or domestic water. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0039] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in the first processing mode, the second processing mode and the third processing mode, O 3 The dosing method is in the form of ozone gas or ozone water. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

[0040] In this embodiment, ozone is added at one time or at multiple points in stages. The concentration range of the added ozone gas is 1% to 100%.

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Abstract

The invention relates to a method for degrading organic pollutants in water by gradient ozone catalytic oxidation, and relates to a gradient ozone catalytic oxidation combination method for degrading organic pollutants in water. By the method, the problem that the conventional advanced oxidation technology has defects during individual use, the problem that the organic pollutants in the water cannot be removed efficiently, the problem that the influence of the pH value and temperature of the water on the method is large, and the problem that high-toxicity byproducts are formed are solved. In the method, water treatment is realized by combining two or three of a process for treating O3 individually, an enhanced catalytic oxidation process for O3 and an O3/ultraviolet (UV) process sequentially. By the reasonable optimizing and gradient combination of the three treatment modes, the method is suitable for wide pH values and a wide temperature range, the pollutants with intermediate toxicity are controlled to be formed, the toxicity of the pollutants is reduced, the pollutants in the water is degraded efficiently and completely, and the content of oxidative species in effluent is controlled. An efficient oxidation treatment effect is kept at low temperature, and the generation of bromate, nitroso dimethylamine, chlorate, perchlorate, iodate and periodate can be controlled greatly.

Description

technical field [0001] The invention relates to a gradient ozone catalytic oxidation combined method for degrading organic pollutants in water. Background technique [0002] In recent years, water bodies have been increasingly polluted, including trace organic pollutants such as endocrine disrupting compounds (EDCs), pharmaceuticals (PPCPs), pesticides, antibiotics, persistent organic pollutants (POPs), and heavy metal pollution. The removal ability is obviously insufficient, and chlorine disinfection will also produce disinfection by-products (DBPs), which are more harmful to human health. Therefore, the deep purification project of drinking water with the purpose of removing trace organic pollutants and disinfection by-products in the water as much as possible is of great significance. [0003] Advanced oxidation technology (Advanced Oxidation Technologies, referred to as AOT), also known as deep oxidation technology, is a new oxidation decontamination technology that use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/78
Inventor 马军李旭春岳思阳关英红陈丽玮谢鹏超邹景杨文花杨一
Owner 哈尔滨工投环保产业有限公司
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