PCI Africa Vertical Shaft wastewater treatment REFURBISHMENT OF WASTE WATER TREATMENT PLANT BEFORE No facilities were available to the operators The rotors were not operational Continual shaft, chain, sprocket and bearing failureswere the norm Advanced corrosion of the rotors was evident EXISTING ROTORS THAT WERE REMOVED EXISTING ROTORS THAT WERE REMOVED AFTERAn inlet works was constructed and newequipment suppliedGenerator, switchgear and chlorine rooms were built4 New Rotors with a larger capacity were supplied vertical shaft INSTALLATION OF NEW ROTATING BIO-CONTACTORS NEW ROTATING BIO-CONTACTORS IN OPERATION