A ceramic membrane assembly based on composite catalyst and its preparation method and application

By encapsulating the composite catalyst in the ceramic membrane channel and combining persulfate activation technology, the problem of difficulty in removing new pollutants in water in microfiltration and ultrafiltration membranes is solved, and efficient removal of organic pollutants and prolonging membrane life is achieved.

CN117228815BActive Publication Date: 2025-08-19GUANGDONG GDH WATER +2
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Patent Information

Application Number
CN202311201919.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-18
Publication Date
2025-08-19
Estimated Expiration
2043-09-18

AI Technical Summary

Technical Problem

In the prior art, it is difficult to effectively remove new pollutants in water, and conventional catalysts are difficult to recover, and it is difficult to ensure that the wastewater and the catalyst are in full contact.

Method used

The composite catalyst is used to encapsulate the ceramic membrane channel, and the ceramic membrane module for encapsulating the catalyst is prepared. The persulfate activation technology is used for catalytic oxidation, and combined with the filtration of the ceramic membrane, the efficient removal of organic pollutants is achieved.

Benefits of technology

It realizes efficient removal of organic pollutants, reduces the amount of activated carbon, reduces the impact of turbidity in the effluent, improves the removal rate of odor, permanganate index and ammonia nitrogen, and extends the service life of the membrane.

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Abstract

The present invention discloses a ceramic membrane assembly based on a composite catalyst, a preparation method thereof, and an application thereof; the ceramic membrane assembly comprises a ceramic membrane, a composite catalyst in a ceramic membrane channel, and a water outlet block and a closure block fixed at both ends of the ceramic membrane; a water extraction hole connected to the surface of the ceramic membrane is provided at one end of the water outlet block. The composite catalyst in the ceramic membrane channel is formed by injecting a slurry into the ceramic membrane channel and then calcining it. The slurry is obtained by adding attapulgite and activated carbon to a copper nitrate solution and impregnating it. The present invention encapsulates a catalyst capable of activating persulfate into the ceramic membrane channel; the obtained ceramic membrane assembly achieves efficient removal of organic pollutants by catalytic oxidation in combination with persulfate during filtration. Compared with ozone-activated carbon technology, it can reduce the amount of activated carbon used, reduce the impact on the turbidity of the effluent, improve the removal rate of odor, permanganate index, and ammonia nitrogen, and reduce indicators such as disinfection by-products, thereby achieving deep treatment of drinking water and wastewater.
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