Water & Wastewater Asia Mar/Apr 2018

WATER & WASTEWATER ASIA March / April 2018 FROM THE GROUND / 25 Opt ima l c l ean i ng frequency? Prolong your membranes, e q u i p m e n t a n d i n f r a s t r u c t u r e ? LuminUltra’s rapid m i c r o b i o l o g i c a l m o n i t o r i n g technology shows how it can be easily done for any water system. O perated by City West Water and located in the western suburbs o f M e l b o u r n e , Australia, the Altona Salt Reduction Plant (ASRP) is a dual membrane plant, which receives tertiary treated effluent from Altona Wastewater Treatment Plant (AWTP) located on the same site. The ASRP has a total capacity of nine million litres per day and the final produced water is used for irrigation and industrial purposes. Every year, approximately two billion litres of the recycled water is supplied to plastics manufacturer, Qenos, for their boiler and cooling water systems; 300 million litres to Sanctuary Lakes Golf Club; 200 million litres to Kooringal Golf Club; five million litres to Hobsons Bay City Council to irrigate Altona Green Park, and six million litres for HD Graham Reserve. In addition, the produced water is also used for urban streetscape watering and dust suppression. The key processes in the dual membrane plant include the pre-UF strainers, ultrafiltration, cartridge filters, reverse osmosis (2-pass), degasification and the chemical systems. Chemicals used on-site include sodium hypochlorite used for UF maintenance washes and disinfection for product water streams; SMBS for quenching; sulphuric acid for pH control; antiscalant, caustic soda and HCl for CIP cleans; lime for calcium addition; and biocide for microbial control.