Photocatalytic membrane reactor and sewage treatment system

The invention discloses a photocatalytic membrane reactor and a sewage treatment system. The photocatalytic membrane reactor comprises a reaction cylinder, a membrane assembly, an ultraviolet emitter and photocatalytic microspheres. Herein, in-situ membrane cleaning can be realized within 3.6 hours, so that the transmembrane pressure (TMP) is reduced from 30kpa to 5kpa. Active oxygen (ROS) generated by TiO2 excited by ultraviolet light not only oxidizes scales on the surface of the hollow fiber membrane, but also quenches signal molecules AHLs of QS (bacterial quorum sensing system), so that membrane pollution is delayed to the maximum extent. Under the condition of ultraviolet light gap type irradiation (17% of the total operation time), the membrane pollution rate is slowed down by more than 7 times. In addition, the photocatalytic membrane reactor can simultaneously realize effluent disinfection. Based on the advantages, the photocatalytic membrane reactor and the sewage treatment system containing the pho