• The existing Rotating Biological Contactors were not operational

• Continual shaft, and bearing failures were the norm

• Advanced corrosion of the rotor was evident

• The media had broken up and was falling off the rotor

• The RBC covers were replaced with  3CR12 frames and polycarbonate sheeting as the existing covers had disintegrated .

• 2 new RBC rotors, with epicyclic geared motors were supplied

• New bearings and media were supplied along with new shafts and HDG steel framework

• The new rotor now requires a lot less maintenance as the new geared motor no longer uses chain drives.

• The gearbox is generously sized and can handle restarts from power outages

• The new media is arranged in replaceable modules such that individual modules can be replaced without replacing the entire media pack.