Flexible membrane diffusers are generically categorized as tube, disc and panel membrane diffusers. It has positive backflow prevention capabilities. It offers greater resistance to fouling with full utilization of apertures and a smooth surface texture. It is used for residential, municipal and industrial wastewater treatment applications. It is also suitable for lake and pond water quality management. It is applied in the aeration of wastewater is treated with biocide to inhibit growth and accumulation of biological materials on the membrane. It is resistant to attack by sulphuric acid.