Alfa Laval Supplies Centrifuges for Sydney Water Pre-Treatment Facility

Alfa Laval will supply four Aldec 50 decanter centrifuges for a new €199 million pre-treatment facility at the Prospect Water Filtration Plant in Sydney, Australia. The installation aims to strengthen system resilience and maintain drinking water quality for the city's expanding population amidst changing climatic conditions.

Infrastructure Capacity and Environmental Pressures
The Prospect Water Filtration Plant serves approximately 85% of Sydney’s population, representing around 5.4 million people, and ranks among the largest facilities of its kind globally. Projections indicate the population served will grow to nearly 8 million over the next 25 years.

Ageing infrastructure and intensifying weather patterns—ranging from extended droughts and bushfires to sudden heavy rainfall and flash flooding—place the city's water infrastructure under increased operational pressure. These weather extremes alter raw water quality and increase the volume of sediment entering the treatment process. To address these demands, infrastructure specialists SUEZ and Acciona, alongside Alfa Laval and the utility's operations team, are delivering a new pre-treatment facility at the Prospect site rather than upgrading existing equipment that had operated for over 25 years.

Engineering Collaboration and Testing Validation
During the preliminary design phase, operational evaluations revealed that existing treatment systems struggled to process extreme flow events following heavy rainfall. To validate performance under variable raw water conditions, Alfa Laval conducted laboratory testing using water samples collected from the Prospect facility.

Engineers simulated extreme raw water contamination by adding mud, sand, and other particulates to test samples under controlled laboratory conditions. The testing demonstrated that the decanter centrifuge technology separated solids to produce clear, odourless water with minimal residual particulate matter while generating a dry solids cake suitable for potential reuse, such as in road construction composites. These separation results remained consistent when scaled up to full operational capacity during testing cycles.

Processing Capabilities and Operational Resilience
The four Alfa Laval Aldec 50 decanter centrifuges provide higher processing flow rates than previous-generation equipment while maintaining a compact physical footprint and low energy consumption. The scalable processing system allows the pre-treatment facility to run during routine baseline conditions while retaining reserve capacity to handle peak flows and turbidity spikes caused by extreme weather without compromising downstream water quality. Once fully constructed, the facility will provide continuous pre-treatment capabilities during peak demand periods or when adjacent treatment infrastructure undergoes scheduled maintenance.

Edited by Romila DSilva, Induportals Editor, with AI assistance.