Method for removing trace organic pollutant contained in recycled water

A technology of organic pollutants and reclaimed water, applied in the direction of water pollutants, chemical instruments and methods, light water/sewage treatment, etc., can solve the problems of increasing the risk of surface water pollution, increasing the risk of pollution, environmental safety issues, etc., to achieve Easy to realize engineering application, high pollutant removal rate, and reduced operating costs

Inactive Publication Date: 2015-02-25
SOUNDGRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the reuse of reclaimed water will also increase the pollution risk of surface water, etc., the traces of toxic and harmful organic substances contained in reclaimed water may continue to accumulate in the water body or soil during the reuse process, increasing the risk of pollution and causing environmental safety issues. question
Existing sewage treatment systems usually only involve the removal of suspended particles, conventional organic matter and nutrients, and do not involve the removal of unconventional organic pollutants such as drugs and hormones
Although more micro-pollutants can be removed through activated sludge adsorption and biodegradation, the residual drugs and hormones that have not been removed will still have potential impacts on the water environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In an urban sewage treatment plant, the main treatment process adopts A 2 O+ coagulation and sedimentation process, the contents of ethinyl estradiol, estrone, nonylphenol, and bisphenol A in the effluent of the sewage treatment plant are 156ng / L, 108ng / L, 61ng / L, and 73ng / L respectively. The pollutants in it are treated by ultraviolet synergistic ozone oxidation technology, and the treatment method includes the following steps:

[0014] (1) Pretreatment, take the regenerated water to be treated (such as the effluent of the secondary sedimentation tank of the sewage treatment plant), and pass through the activated carbon filter device to remove the suspended solids and colloids and other substances;

[0015] (2) Ozone pre-oxidation, the effluent pretreated in step (1) enters the ozone contact tank for ozone pre-oxidation treatment, and the ozonated gas enters the tank through the microporous aeration plate installed at the bottom of the tank and mixes evenly with the wa...

Embodiment 2

[0019] In an urban sewage treatment plant, the main treatment process adopts the oxidation ditch process. The contents of ethinyl estradiol, estrone, nonylphenol, and bisphenol A in the effluent of the sewage treatment plant are 106ng / L, 132ng / L, and 92ng respectively. / L, 112ng / L, using ultraviolet synergistic ozone oxidation technology to treat the pollutants, the treatment method includes the following steps:

[0020] (1) Pretreatment, take the effluent from the secondary settling tank of the sewage treatment plant, and pass through an activated carbon filter device to remove suspended solids and colloids and other substances;

[0021] (2) Ozone pre-oxidation, the effluent pretreated in step (1) enters the ozone contact tank for ozone pre-oxidation treatment, and the ozonated gas enters the tank through the microporous aeration plate installed at the bottom of the tank and mixes evenly with the wastewater to be treated , the dosage of ozone is 10mg / L, and the residence time...

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PUM

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Abstract

The invention discloses a method for removing trace organic pollutants contained in recycled water, and belongs to the field of recycled water treatment. The method comprises the following steps: pretreatment, namely filtering the recycled water; ozone preoxidation treatment, namely carrying out the ozone preoxidation treatment on pretreated effluent water; ultraviolet intensifying treatment, namely carrying out the ultraviolet intensifying treatment on a mixed solution, which is formed after the ozone preoxidation treatment, of water and ozone through ultraviolet radiation so as to complete the removal of the trace organic pollutants contained in the recycled water. The method disclosed by the invention enables the filtration, the ozone preoxidation treatment and the ultraviolet intensifying treatment to be complementary by organically combining three steps of the pretreatment, the ozone preoxidation treatment and the ultraviolet intensifying treatment, thereby efficiently removing the trace organic pollutants contained in the recycled water and having the advantages of high pollutant removal ratio and good treatment effect; and the action capability of the method disclosed by the invention is higher than the sum of the action effects of independent ultraviolet treatment and ozone treatment and the method can be used for reducing the ozone addition amount and the ultraviolet lamp output power and reducing the operating cost compared with a method for independently adopting the ozone treatment or the ultraviolet treatment.

Description

technical field [0001] The invention relates to the field of regenerated water treatment, in particular to a method for removing trace organic pollutants in regenerated water. Background technique [0002] At present, the shortage of water resources has become an important factor restricting the sustainable development of the country's economy and society. As an alternative water resource, urban recycled water has great development advantages and potential. It can replace tap water as industrial circulating cooling water, car washing water, and municipal water for gardens, greening, and road flushing, thereby changing the situation of urban water resource shortage. situation, alleviate the contradiction between supply and demand of urban water, and achieve the purpose of recycling sewage. [0003] Since the reuse of reclaimed water will also increase the pollution risk of surface water, etc., the traces of toxic and harmful organic substances contained in reclaimed water ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/32
CPCC02F9/00C02F1/32C02F1/78C02F2101/30C02F2301/08
Inventor 王斌科姜安平解建坤赵雪莲常莎
Owner SOUNDGRP CO LTD
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