Before revision: A rotating biological contactor or RBC is a biological fixed-film treatment process used in the treatment of wastewater following primary treatment.Mechanical Evolution of the Rotating Biological Contactor Into the 21st Century by D. Mba, School of Engineering, Cranfield University The primary treatment process involves removal of grit, sand and coarse suspended material through a screening process, followed by settling of suspended solids.
After revision: secondaryA rotating biological contactor or RBC is a biological fixed-film treatment process used in the treatment of wastewater following primary treatment.Mechanical Evolution of the Rotating Biological Contactor Into the 21st Century by D. Mba, School of Engineering, Cranfield University The primary treatment process involves removal of grit, sand and coarse suspended material through a screening process, followed by settling of suspended solids.