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Method for purifying wastewater through magnetic nano TiO2/SiO2/Fe2O3 composite photocatalyst and equipment

A magnetic nano, photocatalytic oxidation technology, applied in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as increased cost, secondary environmental pollution, and unsatisfactory effects. Achieve the effect of low cost and high water purification efficiency

Inactive Publication Date: 2005-01-12
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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Problems solved by technology

According to the existing technical means, these treatment methods are generally not thorough enough to treat wastewater or sewage at one time. In order to improve the indicators of wastewater or sewage treatment, it is necessary to repeatedly carry out thermal alkali treatment, biological treatment and ozone treatment, and treat the treated wastewater or sewage. Secondary treatment to meet the requirements of our use and environmental protection requirements, but this treatment method will greatly increase the cost, but the effect is not ideal
Moreover, many additives in the existing sewage treatment methods have toxic and side effects, and are likely to cause secondary pollution to the environment, which does not meet the "green" environmental protection ideal advocated by modern society.

Method used

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  • Method for purifying wastewater through magnetic nano TiO2/SiO2/Fe2O3 composite photocatalyst and equipment

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Embodiment Construction

[0020] figure 1 As shown, in one embodiment of the present invention, the magnetic nano-TiO 2 / SiO 2 / Fe 3 o 4 The composite photocatalyst wastewater purification device refers to a device that undergoes photocatalytic oxidation after coagulation pretreatment.

[0021] Such as figure 1 As shown, the photocatalytic oxidation device includes a water inlet 1 , a treatment tank 3 , a water outlet 2 , an aeration device 4 and an aeration pipe 401 extending into the treatment tank 3 . Light sources 301 and 302 are arranged in the processing pool 3 . The light sources 301 and 302 are ultraviolet light sources, which are uniformly arranged in the center of the treatment pool 3 . The aeration tube is made of plastic, which is a U-shaped cylinder with uniform diameter placed under the light source, and the surface is evenly covered with a certain number of small holes 5, which can play a role in stirring and replenishing after ventilation. The effect of oxygen, the reactant requi...

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Abstract

The method is to do photochemical oxidizing reaction to sewage preprocessed by chemical coagulating sedimentation. Special photochemical oxidizing apparatus is used to make sewage being fully mixed with nanometre photochemical catalyst powder on condition of lighting, then producing photochemical oxidizing reaction, thus harmful substances are oxidized and reducted.

Description

technical field [0001] The invention relates to a treatment method for waste water or sewage, especially using magnetic nano TiO 2 / SiO 2 / Fe 3 o 4 A method and device for purifying waste water or sewage with a composite photocatalyst. Background technique [0002] With the improvement of people's living standards and the strengthening of environmental protection awareness, the research and implementation of wastewater or sewage treatment are also deepening and developing. The existing wastewater or sewage treatment methods generally include physical filtration method, chemical agent method, biochemical method, chemical-oxidation method and so on. Such as CN1120833 disclosed the Chinese invention patent application titled "the sewage treatment method containing organic compounds and inorganic compounds", the sewage treatment method disclosed in it has just included the process of chemical reaction and / or mechanical separation method to separate suspended solids; Alkali ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/00C02F9/04
CPCY02W10/37
Inventor 陈建军廖振华李荣先
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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