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Sewage treatment method through concerted reaction of ozone and supported catalyst

A technology of supported catalyst and sewage treatment method, which is applied in the directions of oxidized water/sewage treatment, water/sewage treatment, flotation water/sewage treatment, etc. It can solve the problem that it is not suitable for high-concentration organic sewage and the sewage lacks economical and effective treatment. Technology and other issues, to achieve the effect of high ozone utilization and low operating costs

Pending Publication Date: 2019-07-30
北京京创净源环境技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, biological treatment is not suitable for treating high-concentration organic sewage, especially organic sewage containing phenols, aldehydes, and macromolecules or polymers that cannot be degraded by microorganisms.
[0004] At present, there is no economical and effective treatment technology for the treatment of sewage containing refractory COD, SS, etc., and the sewage treatment technology using ozone for catalytic oxidation has become a removal technology due to its clean and pollution-free, high oxidation efficiency, and simple operation. One of the key technologies for highly stable and refractory organic matter such as COD and SS in sewage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]A chemical plant treats 1000m³ of sewage daily, and the COD content is 180mg / L. Adopt the method described in the present invention to carry out small-scale test, first feed into the sewage to be treated the oxygen that oxygen content is 90%, the mixing time is 5min, after mixing finishes, drop into polyacrylamide and quicklime, form the water body that contains micro-floc, Then 6% high-density nano-bubbles are introduced, and the ratio of oxygen, oxygen and ozone is 1.5:1. The micro flocs are removed with a mud scraper, and the water body enters the catalytic oxidation tower to undergo a catalytic oxidation reaction with ozone. The dosage of ozone is 5g / m³, the catalyst loaded in the catalytic oxidation tower is TiO 2 / Alumina catalyst, wherein the titanium dioxide content is 1.0%, and the balance is alumina. After the reaction is completed, the COD content of the effluent from the catalytic oxidation tower is 48mg / L, and the COD removal rate is greater than 70%, which...

Embodiment 2

[0044] A chemical plant treats 1200m³ of sewage per day, with a COD content of 200mg / L. A small test is carried out using the method described in the present invention. First, oxygen with an oxygen content of 95% is introduced into the sewage to be treated, and the mixing time is 7 minutes. Polyacrylamide and quicklime form a water body containing micro-floc, and then pass through 8% high-density nano-bubbles, in which the ratio of oxygen to ozone is 10:1, use a mud scraper to remove the micro-floc, and the water enters the catalytic The oxidation tower and ozone undergo a catalytic oxidation reaction, the dosage of ozone is 20g / m³, and the catalyst filled in the catalytic oxidation tower is TiO 2 / Alumina catalyst, wherein the titanium dioxide content is 7.0%, and the balance is alumina. After the reaction is completed, the COD content of the effluent from the catalytic oxidation tower is 50mg / L, and the COD removal rate is greater than 75%, reaching the first-level standard ...

Embodiment 3

[0046] A chemical factory treats 1800m³ of sewage per day, and the COD content is 220mg / L. A small test is carried out by using the method of the present invention. First, oxygen with an oxygen content of 99% is introduced into the sewage to be treated, and the mixing time is 10 minutes. Polyacrylamide and quicklime form a water body containing micro-floc, and then pass through 11% high-density nano-bubbles, in which the ratio of oxygen to ozone is 20:1, use a mud scraper to remove the micro-floc, and the water enters the catalytic The oxidation tower and ozone undergo a catalytic oxidation reaction, the dosage of ozone is 50g / m³, and the catalyst filled in the catalytic oxidation tower is MnO 2 / alumina catalyst, wherein the manganese dioxide content is 15.0%, and the balance is alumina. After the reaction is completed, the COD content of the effluent from the catalytic oxidation tower is 40mg / L, and the COD removal rate is greater than 80%, which has reached the first-level ...

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Abstract

The invention relates to the technical field of water treatment, and discloses a sewage treatment method through a concerted reaction of ozone and a supported catalyst. The method comprises the following steps that (1) a coagulant and a coagulant aid are added into to-be-processed sewage, stirring is conducted, and water containing micro-flocculation groups is formed; (2) high-density nano-bubblesare introduced in the water which is processed in the step (1) and contains the micro-flocculation groups, and the micro-flocculation groups are removed by a mud scraper and separated from the water;(3) the separated water in the step (2) is conveyed into a catalytic oxidation tower, a jet device is utilized for mixing the ozone with high-pressure return water of the catalytic oxidation tower, the mixture enters the catalytic oxidation tower, the ozone is added circularly, and a catalytic oxidation reaction is conducted at normal temperature and normal pressure; the catalytic oxidation toweris filled with the catalyst, and the catalyst is the supported catalyst with a transition metal oxide as an active component and aluminium oxide and / or ceramsite as a carrier. The method can effectively remove organic pollutants in sewage, and is high in ozone utilization rate and low in operation cost.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a sewage treatment method for synergistic reaction of an ozone-loaded catalyst. Background technique [0002] The development of science and technology has also brought more and more environmental pollution problems. In order to protect the ecological environment, in addition to advocating energy conservation and emission reduction, pollutant treatment is also essential. Sewage treatment is particularly important in the context of increasingly scarce water resources around the world. After the sewage is treated, it can be recycled to save water. [0003] Sewage contains a large amount of COD, SS, etc. Common sewage treatment methods include physical treatment, chemical treatment and biological treatment. The physical treatment method separates and recovers the undissolved suspended pollutants (including oil film and oil beads, etc.) in the sewage through physical acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/30
CPCB01D2255/20707B01D2255/2092C02F1/24C02F1/5236C02F1/56C02F1/725C02F1/78C02F9/00C02F2101/30
Inventor 于明马雄威顾华丁文章高岩
Owner 北京京创净源环境技术研究院有限公司
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