Bells Island Waste Water Treatment Plant
Occupying 53ha of Bells Island on the Waimea Inlet, the Bells Island Sewage Treatment Plant includes a pre-treatment system consisting of a step screen and a grit chamber. A high rate activated sludge basin was installed in 2005 at the same time the existing clarifier underwent rehabilitation and improvements.
The treatment plant treats sewage equivalent to that generated by a domestic population of around 133,000.
• ADWF: 15,000m³/day
• Peak Flowrate: 50,000m³/day
• Design BOD load: 8,000kg/day
• BOD of treated effluent: <50kg/m³
•Design Suspended Solids load: 10,000kg/day
Extensive details are available here - http://www.nrsbu.govt.nz/bells-island-sewage-treatment-plant/