Reverse osmosis concentrated water treatment process for enhancing activated carbon adsorption through catalytic ozonation

A technology of ozone catalytic oxidation and activated carbon adsorption, which is applied in the direction of oxidation water/sewage treatment, water/sewage treatment, water treatment parameter control, etc., to achieve the effect of simple process flow, low salt content and good synergistic effect

Inactive Publication Date: 2021-11-19
SHANGHAI HONESS ENVIRONMENTAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to provide a reverse osmosis concentrated water treatment process in which ozone catalytic oxidation strengthens activated carbon adsorption in view of the shortcomings and deficiencies in the existing technology for removing organic pollutants in reverse osmosis concentrated water

Method used

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  • Reverse osmosis concentrated water treatment process for enhancing activated carbon adsorption through catalytic ozonation
  • Reverse osmosis concentrated water treatment process for enhancing activated carbon adsorption through catalytic ozonation

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Embodiment 1

[0044] A reverse osmosis concentrated water treatment process in which ozone catalytic oxidation strengthens activated carbon adsorption. The main processing units used in this embodiment are activated carbon oxidation adsorption, coagulation sedimentation, and activated carbon backwash regeneration. The reverse osmosis concentrated water quality indicators used in the experiment are pH 8.09, water temperature 25°C, CODCr content 82.16mg / L, TDS content 3250mg / L, and the salts included are mainly sodium chloride and sodium sulfate.

[0045] Including the following steps:

[0046] (1) Oxidation adsorption: Take 1000ml reverse osmosis concentrated water for experiment, the diameter of the experimental reaction column is 50mm, and the height is 1500mm. The amount of powdered activated carbon was added to the reverse osmosis concentrated water at 1.0g / L, and ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O) The dosage is 60mg / L, and 20mg / L of H is added to the reverse osmosis concent...

Embodiment 2

[0051] A reverse osmosis concentrated water treatment process in which ozone catalytic oxidation strengthens activated carbon adsorption. The main processing units used in this embodiment are activated carbon oxidation adsorption, coagulation sedimentation, and activated carbon backwash regeneration. The water quality index of reverse osmosis concentrated water used in the experiment is: pH value is 6.99, water temperature is 25°C, COD Cr The content is 150.32mg / L, the TDS content is 4550mg / L, and the salts included are mainly sodium chloride and sodium sulfate.

[0052] Including the following steps:

[0053] (1) Oxidation adsorption: Take 1000ml reverse osmosis concentrated water for experiment, the diameter of the experimental reaction column is 50mm, and the height is 1500mm. The amount of powdered activated carbon added to reverse osmosis concentrated water is 0.5g / L plus 1.5g / L powdered activated coke, and ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O) The dosage is 90...

Embodiment 3

[0057] A reverse osmosis concentrated water treatment process in which ozone catalytic oxidation strengthens activated carbon adsorption. The main processing units used in this embodiment are activated carbon oxidation adsorption, coagulation sedimentation, and activated carbon backwash regeneration. The water quality index of reverse osmosis concentrated water used in the experiment is: pH value is 7.86, water temperature is 25°C, COD Cr The content is 230.11mg / L, the TDS content is 6872mg / L, and the salts included are mainly sodium chloride and sodium sulfate.

[0058] Including the following steps:

[0059] (1) Oxidation adsorption: Take 1500ml reverse osmosis concentrated water for experiment, the diameter of the experimental reaction column is 50mm, and the height is 1500mm. The amount of powdered activated carbon added to reverse osmosis concentrated water is 1.0g / L plus 1.5g / L powdered activated coke, and ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O) dosage is 120mg / ...

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Abstract

The invention discloses a reverse osmosis concentrated water treatment process for enhancing activated carbon adsorption through catalytic ozonation, organic matters in reverse osmosis concentrated water can be effectively adsorbed by an activated carbon adsorption technology, but the saturated adsorption quantity is small, and the dosage and cost of activated carbon are relatively large. Meanwhile, in a high-salt-content environment, hydroxyl radicals generated in the catalytic ozonation process are easily consumed by a large number of chloride ions in a water body, so that the oxidation efficiency is very low. According to the process, catalytic ozonation and activated carbon adsorption technologies are combined, the adsorption performance of activated carbon is fully utilized, organic matters in concentrated water are diffused and adsorbed into a microporous structure of the activated carbon, and then strong oxidation intermediates such as hydroxyl radicals generated by catalytic ozonation can be dispersed into the microporous structure of the activated carbon with low salinity, and organic pollutants are efficiently degraded. The ozone catalytic oxidation enhanced activated carbon adsorption can achieve a good synergistic effect, the adsorption efficiency of the activated carbon is improved, and the deep treatment efficiency of the reverse osmosis concentrated water is improved.

Description

technical field [0001] The invention relates to a process for treating reverse osmosis concentrated water, in particular to the treatment of concentrated water produced in industrial enterprises using nanofiltration or reverse osmosis to produce recycled water, and belongs to the field of industrial wastewater treatment. Background technique [0002] In recent years, due to the rapid construction and development of coal chemical projects and other industrial projects, water consumption and wastewater discharge have also increased rapidly, especially where most coal chemical projects are located due to water shortage and the ecological environment is very fragile. Therefore, the recycling and utilization of water resources and The problem of wastewater discharge is very prominent, and the problem of zero discharge of high-salt concentrated water has become one of the limiting factors restricting the development of the coal chemical industry. [0003] At present, most enterpri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/283C02F1/725C02F1/722C02F1/78C02F1/5281C02F1/5245C02F1/56C02F2201/782C02F2303/16C02F2209/08C02F2209/10
Inventor 王文标乔瑞平王浩
Owner SHANGHAI HONESS ENVIRONMENTAL TECH CORP
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