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Dynamic catalytic water treatment ceramic membrane and application thereof

A ceramic membrane and water treatment technology, applied in the fields of water treatment, ozone catalysis and ceramic membrane filtration, can solve the problems of poor membrane filtration accuracy, many membrane defects, and low membrane separation efficiency, and achieve low permeability resistance and mass transfer efficiency. High and catalytic efficiency

Active Publication Date: 2021-08-31
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the occurrences in the integration process of ozone oxidation and ceramic membrane separation technology: the catalytic degradation efficiency of simple ozone oxidation and ceramic membrane filtration is low; the catalytic effect of doped catalyst modified ceramic membrane is not obvious, there are many membrane defects and membrane The filtration accuracy is poor; there are a series of problems such as low membrane separation efficiency and poor stability of the catalytic functional layer when coating the surface of the ceramic membrane with a catalytic functional layer

Method used

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  • Dynamic catalytic water treatment ceramic membrane and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step (1) is to modify the commercial titanium dioxide particles with a particle size range of 0.1 to 0.5 μm into microspheres with rounded particles and uniform size through ball milling technology; prepare metal manganese alkoxide sol; Titanium dioxide microspheres were immersed in metal manganese alkoxide sol for 4 hours, and the titanium dioxide microspheres after centrifugation were dried in an oven at 100°C for 3 hours; finally, the dried titanium dioxide microspheres were kept in a muffle furnace at 600°C for 3 hours, Nanoparticles coated with a layer of manganese metal.

[0029]Step (2) is to disperse the titanium dioxide microspheres coated with metal manganese nanoparticles prepared in step (1) in the feed tank of 500L according to 1wt%; Before entering the biochemical tail water of the industrial wastewater treatment plant, the suspension of titanium dioxide microspheres coated with dispersed metal manganese nanoparticles was circulated in a cross-flow at a pr...

Embodiment 2

[0034] Step (1) is to modify the commercial titanium dioxide particles with a particle size range of 0.1 to 0.5 μm into microspheres with rounded particles and uniform size through ball milling technology; prepare metal manganese alkoxide sol; Titanium dioxide microspheres were immersed in metal manganese alkoxide sol for 4 hours, and the titanium dioxide microspheres after centrifugation were dried in an oven at 100°C for 3 hours; finally, the dried titanium dioxide microspheres were kept in a muffle furnace at 600°C for 3 hours, Nanoparticles coated with a layer of manganese metal.

[0035] Step (2) is to disperse the titanium dioxide microspheres coated with metal manganese nanoparticles prepared in step (1) in the membrane pool of 1000L according to 1wt%; adopt the silicon carbide flat ceramic membrane negative pressure suction type with 0.1 μm aperture Dead-end filtration, before entering the biochemical tail water of the domestic sewage treatment plant, the suspension of...

Embodiment 3

[0040] Just change metal manganese into metal cobalt in embodiment 2, the treated domestic sewage is changed into a certain river channel water in Zhejiang, and other conditions remain unchanged.

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Abstract

The invention relates to the technical field of porous ceramic materials and membrane separation, in particular to a dynamic catalytic ceramic membrane and application thereof in water treatment. The invention relates to a dynamic catalytic water treatment ceramic membrane which mainly comprises a ceramic membrane and a dynamic catalytic functional layer formed on the surface of the ceramic membrane, wherein the dynamic catalytic functional layer is formed by coating the surfaces of titanium dioxide particles with a layer of metal alkoxide thin film. The invention also relates to the application of the membrane in the water treatment industry. The method has the advantages that the filtering function of the ceramic membrane layer is not damaged, the filtering resistance and permeation flux of the ceramic membrane are not influenced, meanwhile, the utilization efficiency of ozone is improved, the ozone is catalyzed and activated to generate hydroxyl radicals, non-degradable organic pollution in selective oxidation water is avoided, the formation of membrane pollutants is effectively relieved, and therefore, the membrane-method water treatment technology is efficient, safe and stable.

Description

technical field [0001] The patent of the invention relates to the technical field of water treatment, in particular to the technical field of ozone catalysis and ceramic membrane filtration, specifically a method for dynamic catalytic ceramic membrane water treatment. Background technique [0002] Water pollution has become a major environmental problem affecting my country's sustainable development. With the acceleration of industrialization and population urbanization, my country's water resource shortage and water pollution are becoming more and more serious. Its main sources of pollution are industrial wastewater and domestic sewage, but the pollution of drinking water has also become the focus of attention in recent years. At present, micro-pollution of drinking water sources has become a common problem in our country, and it will continue to exist for a long time to come. In addition to rust and sediment visible to the naked eye, drinking water pollution also has pat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D69/12B01D71/02B01J21/06B01J37/02B01J23/34B01J23/745B01J23/75B01J23/755C02F1/44C02F1/78
CPCB01D69/02B01D69/12B01D71/024B01D71/025B01D71/027B01D71/02B01J21/063B01J37/0036B01J37/0201B01J37/0215B01J23/34B01J23/745B01J23/75B01J23/755C02F1/44C02F1/78C02F1/725Y02W10/37
Inventor 王俊杰陈锋涛方泽吕汪洋陈文兴
Owner ZHEJIANG SCI-TECH UNIV
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