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Method for continuously treating dynamic sewage through photocatalysis

A technology of photocatalysis and photocatalysis, applied in chemical instruments and methods, light water/sewage treatment, oxidized water/sewage treatment, etc. problems, to avoid poisoning, controllable flow rate and flow

Inactive Publication Date: 2012-07-11
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wastewater contains a large number of organic pollutants, many of which are difficult to biodegrade, such as phenols, polychlorinated biphenyls and polycyclic aromatic hydrocarbons. Their biological toxicity is relatively high, which seriously threatens human health and life.
[0003] The photocatalytic treatment of sewage has become a hot spot in recent years due to its advantages of high efficiency and energy saving. However, currently known photocatalytic treatment methods are to place sewage in a reactor and use a single light source for the reaction.
However, most of the sewage in actual industrial production is fluid, and most of them contain suspended solids and some substances that are easy to reduce the activity of photocatalysts. This makes the usual methods not very good for industrial sewage treatment. The application of photocatalytic technology in practice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Pass the real sewage through a container filled with quartz sand to filter out the insoluble matter in the sewage;

[0020] (2) Add Fenton's reagent to the filtered sewage;

[0021] (3) Then pass the sewage through the container filled with activated carbon;

[0022] (4) Pass the pretreated sewage into two photocatalytic reactors connected in series. According to the type of sewage, the two photocatalytic reactors can choose to use the same or different light sources or photocatalysts;

[0023] (5) If the sewage after the reaction is not up to the standard, it can be returned to the pretreatment device for recycling treatment.

[0024] On the basis of the above scheme, the application of treating sewage from a refinery in Tianjin:

[0025] (1) The flow and velocity of sewage are controlled by flowmeters;

[0026] (2) The photocatalytic reaction light source is ultraviolet and visible light source, the light source directly irradiates the solution, and the solutio...

Embodiment 2

[0030] (1) Pass real sewage through a container filled with fine sand and molecular sieves to filter out insoluble matter in sewage;

[0031] (2) Put flocculant into the filtered sewage;

[0032] (3) Then pass the sewage through the container filled with activated carbon fibers;

[0033] (4) Pass the pretreated sewage into two photocatalytic reactors connected in series. According to the type of sewage, the two photocatalytic reactors can choose to use the same or different light sources or photocatalysts;

[0034] (5) If the sewage after the reaction is not up to the standard, it can be returned to the pretreatment device for recycling treatment.

[0035] On the basis of the above scheme, the application of treating sewage from a refinery in Tianjin:

[0036] (1) The flow and velocity of sewage are controlled by flowmeters;

[0037] (2) The photocatalytic reaction light source is ultraviolet and visible light source, the light source directly irradiates the solution, and t...

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Abstract

The invention discloses a method for continuously treating dynamic sewage through photocatalysis. The method consists of earlier-stage pretreatment and photocatalysis treatment, and particularly comprises the following steps of: (1) introducing sewage into a coarse filtration container, and filtering insoluble substances in sewage; (2) putting an early-stage treating agent into filtered sewage; (3) introducing the sewage into a fine filtering container; and (4) introducing the pretreated sewage into at least two photocatalysis reactors which are connected in series, wherein light sources and photocatalysts used in the photocatalysis reactors are the same or different. In the method, continually-flowing practical sewage is treated dynamically, and a novel solution is provided for the treatment of mindustrial waste water; a complete pretreatment part is provided, so that poisoning of the photocatalyst can be prevented; the flow speed and flow of sewage are controllable, so that the influence of the treating time of each part on sewage treatment can be better monitored; and multiple photocatalysis reactors are connected in series, so that multiple light sources and photocatalysts can be selected and matched according to different pollutants.

Description

technical field [0001] The invention relates to the field of photocatalytic treatment of industrial sewage, in particular to a method capable of performing multi-choice dynamic comprehensive treatment mainly on photocatalysis for continuously flowing industrial sewage. Background technique [0002] With the rapid development of industrial production, a large amount of waste is continuously discharged into nature, which makes the living environment of human beings worse and worse, and the problem of water environment pollution is particularly serious. Wastewater contains a large number of organic pollutants, many of which are difficult to biodegrade, such as phenols, polychlorinated biphenyls and polycyclic aromatic hydrocarbons. Their biological toxicity is relatively high, which seriously threatens human health and life. [0003] Photocatalytic treatment of sewage has become a hot spot in recent years due to its advantages of high efficiency and energy saving. However, curr...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/30C02F1/32C02F1/72C02F1/52
Inventor 郑经堂杨哲隋吴彬吴明铂曲险峰李石李峰于维钊张玉贞赵玉翠刘倩江波刘颖
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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