25/09/2014
Rotating Biological Contactor:
Rotating Biological contractor is one type of treatment system. Treatment system with RBC can be designed to provide secondary or advanced level of treatment. Where a nitrified effluent is required, RBC can be used to provide combined treatment for BOD and ammonia nitrogen, or to provide separate nitrification of secondary effluent.
The RBC process applicable typically consists of a number of units operated in series. The number of stage depends on the treatment goal, with two to four stages of BOD removal and six or more stages for nitrification. Stages can be accomplished by using baffles in a single tank or by use of separate tanks in series. The suppliers of RBC equipment differ in there disc designs, shaft, and packing support, and configuration designs. The principal elements of a RBC system design are the shaft, disk materials and configuration, drive system, enclosures and settling tanks