Hydrex Biorotor - Rotating Biological Contactor - Brochure

The BIOROTOR is a biological treatment process for oxidizing organics pollutants in wastewater. It consists of a large diameter contact media attached to a central shaft rotating slowly in a wastewater basin. The media is only partially submerged. As the contactor rotate, the media is alternately submerged in the wastewater then exposed to air. This rotating action provides for the aeration of the wastewater while creating the necessary turbulence to mix the basin content to prevent the solids from settling out. The bacteria naturally present in the wastewater grow quickly as they adhere to the media surface. Within 2-3 weeks after initial start-up the entire surface will be covered with 2-4mm of active bacteria growth called biomass. The high concentration of bacteria in the biomass provides for a high degree of purification at a relatively short retention time.