Device for reducing and removing biological membrane on surface of filler in sewage treatment device

A device for reducing and removing a biological membrane on the surface of filler in a sewage treatment device comprises ultrasonic treatment assemblies arranged on the two sides of the sewage treatment device and the biological membrane used for treating the surface of the filler. The filtering assembly is arranged at one end of a water outlet of the sewage treatment device; the water quality on-line monitoring system is arranged behind the filtering assembly and is used for monitoring the water quality and the water flow of the water outlet in real time; the control module is connected to the ultrasonic treatment assembly, the filtering assembly and the water quality on-line monitoring system; the ultrasonic treatment assembly comprises an ultrasonic generator and an ultrasonic transducer electrically connected with the ultrasonic generator, and the ultrasonic generator controls the ultrasonic transducer to generate a cavitation effect, so that a biological membrane on the surface of the filler is impacted