Rio Tinto Kestrel Mine STP

Wastewater Treatment

August 2011

About this Project

This Membrane Bioreactor (MBR) Waste Water Treatment Plant (WWTP) is designed to treat effluent from a mining camp to a quality suitable for irrigation. The plant is fully automated via a PLC and a touch screen operator interface.

The MBR process involves a suspended growth activated sludge system that utilises microporous membranes for solid/liquid separation in lieu of secondary clarifiers. The system includes sewage collection and balancing, screening and flow splitting, anoxic zone, and two individual containerised treatment trains featuring an aeration zone, submerged membranes and mixed liquor recycle. Phosphorous removal is achieved by metal salt chemical precipitation.

Disinfection is undertaken using liquid chlorine dosing flow paced to the filtrate pump VSD.