Review Paper on Study of Rotating Biological Contactor for Wastewater Treatment Process

Abstract

There are many wastewater treatment technologies in use today. Rotating biological contactors (RBCs) serves as a superior alternative for biodegradable material, BOD removal rate and COD removal, less area requirement, less energy consumption, with very short start-up, with low cost of operating, less maintenance cost and treatment efficiency. Presently this review of RBC focus on parameters that affect performance like rotational speed, detention time, influent and effluent wastewater characteristics. Here it is proposed to study the performance RBC for various parameters and operating conditions. RBC consists of parallel circular discs attached perpendicular to a horizontal shaft which passes through their centers. The entire assembly is placed into tank with the shaft slightly above the surface of liquid so that the disc approximately 40% immersed. Microorganism grows on surface of disc and rotation of the shaft brings them into contact with liquid allowing the digestion of organic matter.