We provide wide options of Rotating Biological Contactor (RBC) either for simple BOD removal or advanced treatment processes requiring nutrient removal. These units can be provided for high degree of biological treatment through multi stage series Reactors attached with high density non-metallic media. The media is loaded on the centre shaft in the specially designed configuration and is rotated through the air injected beneath the media through Coarse Bubble Aeration system. Units can also be supplied with independent drive arrangement to rotate the entire packed media supported on the shaft in circular discs.