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Rotating Biological Contactor(RBC):-
 
 
Introduction:-
 

Rotating biological contactors (RBCs) is a remediation technology used in the secondary treatment of wastewater.
This technology involves allowing wastewater to come in contact with a biological medium in order to facilitate the removal of contaminants. There are several different designs now available, but in its simplest form a rotary biological contactor (RBCs) consists of a series of discs mounted on a shaft, which is driven so that the discs rotate at right angles to the flow of settled sewage.
 

Working Principle:-

 

The RBC process consists of a large disc with radial and concentric passages slowly rotating in a concrete tank.  The rotation and subsequent exposure to oxygen allows organisms to multiply and form a thin layer of biomass.  This large, active population causes the biological degradation of organic pollutants.  Excess biomass shears off at a steady rate and is then carried through the RBC system for removal in a clarifier.
 

Applications:-
 

Residential/Commercial Complexes, Hotels, Restaurants, I.T. Parks, Theme Parks, Amusement Parks, Golf Courses, Hospitals, Resorts, Camps, industrial Townships, Educational Institutions, Isolated Clusters, Small & Medium Industries, Bus/Air/Rail Terminals/Depots, etc. Besides this, Municipalities can adopt this technology for conversion of sewage in to secondary grade reuse/recycle water and for aquifer recharge programme.               
 

Advantages:-
 

These rotating biological contactors offer many advantages like:

  • The capability of handling a wide range of flows.
  • Low power requirements
  • Low sludge requirements
  • Excellent process control.
  • Maintenance and housekeeping requirements are minimal.
  • Only basic operator skills required.