Abstract: A photocatalysis-ceramic membrane coupling reactor was designed and used for the photocatalytic degradation of methyl orange. The rejection rate of TiO2, the filtrate flux, and the degradation rate of methyl orange in this reactor under the condition of back flushing were investigated. The rejection rate of the TiO2 photocatalyst particles reaches 99.9%. Within one period of partial reflux, the average degradation rate of the methyl orange solution is 10%, which is higher than that obtained in a cylindrical reactor.

Key words: titania, photocatalysis, ceramic membrane, coupling reactor, methyl orange, degradation