Successful commissioning and optimisation of an automated wet chemical scrubbing system The odour conTrol FAcIlITy AT murrumBA downS wwTp

The Murrumba Downs Wastewater Treatment Plant (WWTP) has recently been upgraded to increase capacity of the facility to 30.8 megalitres per day in order to meet the demands of a growing population within Brisbane’s Northern Growth Corridor. The project utilised the latest technology in biological nutrient removal and odour control in order to meet rigorous environmental standards. A significant part of the works was the construction of a new Odour Control Facility (OCF) to eliminate nuisance odours to the surrounding community. The OCF has a capacity of 67,000m 3 /hr and comprises a two-stage wet chemical scrubbing system (Venturi scrubber, followed by a packed bed scrubber incorporating the Odorgard® catalyst system) using sodium hydroxide and sodium hypochlorite. In addition, an emergency bypass activated carbon filter system was provided. This paper details the steps in commissioning and optimisation of the odour plant to achieve the required discharge requirements of the project.