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Heterogeneous composite catalytic oxidation sewage advanced treatment method and system thereof

A technology of catalytic oxidation and advanced treatment, which is applied in the direction of oxidized water/sewage treatment, heterogeneous catalyst chemical elements, water/sewage treatment, etc. Problems such as the treatment of degraded substances, to achieve the effect of improving the reuse rate and catalytic effect, high production rate, and improving the effective utilization rate

Pending Publication Date: 2020-07-10
北京禹涛环境工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the composition of industrial sewage is complex, difficult to be effectively removed, poor biodegradability, high toxicity, great harm to the environment and human beings, and cannot meet people's requirements for water quality
The current conventional biochemical water treatment process is difficult to effectively remove these refractory organic pollutants. Therefore, advanced oxidation technology has become an important means to treat biological refractory organic and toxic pollutants.
The traditional heterogeneous catalytic ozone oxidation process simply uses ozone to treat sewage, and the utilization rate of ozone is low, and the operating cost is expensive, which limits its ability to treat organic matter in sewage, and cannot effectively treat refractory substances. The treatment effect is relatively Difference

Method used

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  • Heterogeneous composite catalytic oxidation sewage advanced treatment method and system thereof
  • Heterogeneous composite catalytic oxidation sewage advanced treatment method and system thereof

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preparation example Construction

[0088] The preparation method of composite catalyst described in S2 comprises the steps:

[0089] S21, using an equal-volume immersion method, weighing transition metal nitrate and chloride salts according to the proportion, adding water or ethanol or other organic solvents to dissolve, and preparing a metal salt solution.

[0090] S22, adjusting the pH value of the metal salt solution to 11-13, stirring evenly, and standing still.

[0091] S23, take γ-Al 2 o 3 The ball is immersed in the above metal salt solution for 10-15 hours.

[0092] S24, drying the γ-Al 2 o 3 The ball is sintered at a high temperature, the sintering temperature is 300-500° C., and the holding time is 2-5 hours to obtain a composite catalyst.

[0093] The mass fraction ratio of ozone input amount to COD removal amount in S2 is 0.4-1.

[0094] This embodiment also provides a heterogeneous composite catalytic oxidation sewage advanced treatment system for the above-mentioned heterogeneous composite c...

Embodiment 1

[0137] Utilize the processing method of the present invention to process certain hospital waste water, the COD concentration in the waste water is 210mg / L, adopt the method flow process of the present invention to process above-mentioned waste water, the catalyst carrier of selection is gamma-Al 2 o 3 , its active component is Mn-Ce-Cu, the weight ratio of each component of the catalyst is Mn:Ce:Cu=3:1:2, the flow rate of ozone is 1.0L / min, and the COD concentration in the wastewater after treatment is 15mg / L, the COD removal rate reached 92.86%.

Embodiment 2

[0139] Utilize the processing method of the present invention to process certain chemical factory waste water, the COD concentration in the waste water is 1500mg / L, the above-mentioned waste water adopts the method flow process described in the present invention to process, and the selected catalyst carrier is γ-Al 2 o 3 , its Mn-Ce-Co, the weight ratio of each component of catalyst is Mn:Ce:Co=5:2:3, the flow of ozone is 2.5L / min, and the COD concentration in the waste water after treatment is 30mg / L, COD removal rate reaches 98%.

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Abstract

The invention provides a heterogeneous composite catalytic oxidation sewage advanced treatment method. The method comprises the following steps: S1, pumping pretreated sewage into a sewage collectiondevice to remove suspended solids and colloidal substances; S2, mixing effluent of the sewage collection device with ozone through an ozone micro-nano bubble forming device, making the mixture enter acatalytic reaction device to react with a composite catalyst filled in the catalytic reaction device; and S3, filling the tail gas discharged from an outlet of the catalytic reaction device into a tail gas treatment device, performing heating to decompose ozone tail gas, then decomposing the ozone tail gas through a catalyst layer, and discharging the treated tail gas after reaching the standard.The invention further provides a heterogeneous composite catalytic oxidation sewage advanced treatment system. The system comprises the sewage collection device, the ozone micro-nano bubble forming device, the catalytic reaction device and the tail gas treatment device. According to the invention, organic pollutants can be quickly degraded, the utilization rate and oxidation efficiency of ozone can be greatly improved, the mineralization removal effect of pollutants is enhanced, and no secondary environmental pollution is generated.

Description

technical field [0001] The invention relates to the technical field of organic wastewater treatment, in particular to a heterogeneous composite catalytic oxidation sewage advanced treatment method and system thereof. Background technique [0002] At present, the composition of industrial sewage is complex, difficult to be effectively removed, poor biodegradability, high toxicity, great harm to the environment and human beings, and cannot meet people's requirements for water quality. The current conventional biochemical water treatment process is difficult to effectively remove these refractory organic pollutants. Therefore, advanced oxidation technology has become an important means to treat biological refractory organic and toxic pollutants. The traditional heterogeneous catalytic ozone oxidation process simply uses ozone to treat sewage, and the utilization rate of ozone is low, and the operating cost is expensive, which limits its ability to treat organic matter in sewage...

Claims

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Application Information

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IPC IPC(8): C02F9/04B01J23/889B01D53/86B01D53/66C02F101/30C02F103/06
CPCC02F1/725C02F1/78C02F1/001B01J23/8892B01D53/8675C02F2101/30B01J2523/00C02F2103/06B01J2523/17B01J2523/31B01J2523/3712B01J2523/72Y02A50/20
Inventor 许昌相王硕王丹
Owner 北京禹涛环境工程有限公司
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