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Method for removing pollutants in water through enhanced air floatation

A technology for removing water and strengthening gas, applied in water pollutants, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problems of slow degradation of organic pollutants, low removal rate, difficulty in reaching standards, etc., and achieve removal rate Fast, simple operation, good degradation effect

Pending Publication Date: 2020-03-17
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the object of the present invention is to provide a method for strengthening air flotation to remove pollutants in water, wherein by controlling the specific types of reagents added to the water body to be treated, the existing air flotation treatment can Carry out effective strengthening to solve the technical problems of slow degradation of organic pollutants, low removal rate and difficulty in reaching the standard in the raw water treatment of water supply plants

Method used

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  • Method for removing pollutants in water through enhanced air floatation
  • Method for removing pollutants in water through enhanced air floatation

Examples

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Embodiment 1

[0031] This embodiment utilizes ferrous ion and sulfite to treat tetrabromobisphenol A in water, and carries out according to the following steps:

[0032] (1) Add ferrous ion 50mg / L and sodium sulfite 250mg / L to the water to be treated, then use sodium hydroxide solution and dilute sulfuric acid to adjust the pH of the water to be treated containing tetrabromobisphenol A to 6, and use air aeration React with mechanical stirring for 30 minutes. Of course, the aeration treatment can also use oxygen aeration.

[0033] In step 1 of this embodiment, ferrous ions and sulfites are added as a solution.

[0034] Present embodiment utilizes ferrous ion and sulfite to treat the curve of the removal effect of tetrabromobisphenol A in water as figure 1 shown. From figure 1It can be seen that the ferrous / sulfite system has a fast degradation rate and a good removal rate for organic matter in the presence of oxygen.

Embodiment 2

[0036] This embodiment utilizes the enhanced air flotation process of iron or ferrous ions and sulfite to compare the conventional water supply plant air flotation process to process the raw water method of the water supply plant containing bisphenol A (concentration 0.019mg / L), as follows:

[0037] (1) During the coagulation stage, 25 mg / L (calculated as iron) of polyaluminum ferric sulfate is added to the water.

[0038] (2) Add 22 mg / L of sulfite to the water during the coagulation stage or the air flotation stage.

[0039] (3) The treated water is introduced into the subsequent water treatment structure for subsequent treatment, and the operation of removing organic pollutants in water by using iron ions or ferrous ions and sulfite can be completed.

[0040] In this embodiment, the curves of conventional air flotation process and enhanced air flotation process to the removal effect of raw water containing bisphenol A are as follows figure 2 shown. The national drinking ...

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Abstract

The invention belongs to the field of treatment of pollutants in water, and particularly discloses a method for removing pollutants in water by enhanced air floatation. The method comprises the following steps: adding iron ions or ferrous ions into water to be treated, adding sulfite, and treating the water to be treated by an air floatation technique in order to achieve the removal of organic pollutants in water by enhanced air floatation. The specific types of the reagents added into the water to be treated are controlled to effectively enhance existing air floatation treatment, so the technical problems of low degradation speed, low removal rate and difficult standard reaching of organic pollutants in raw water treatment of a water supply plant are solved, and the method is a method capable of quickly degrading the organic pollutants.

Description

technical field [0001] The invention belongs to the field of pollutant treatment in water, and more specifically relates to a method for strengthening air flotation to remove pollutants in water. Background technique [0002] With the development of economy and society, the problem of environmental pollution is becoming more and more serious. As a country in rapid development, the problem of water pollution cannot be underestimated. Among them, surface rivers, lakes, groundwater and soil are most severely polluted by persistent refractory organic pollutants. At present, the removal methods of water pollution include physical adsorption, chemical reduction, biodegradation, advanced oxidation and so on. Among them, the advanced oxidation method is widely used in the degradation of organic matter because of the high redox potential of the free radicals generated. The existing advanced oxidation technology is mostly used in sewage treatment, but rarely used in urban water suppl...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/34
CPCC02F1/24C02F1/5236C02F1/5245C02F1/56C02F1/72C02F2101/345
Inventor 谢鹏超张立万颖丁家琪王晶文
Owner HUAZHONG UNIV OF SCI & TECH
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