Desalination plants in Australia

The planning and implementation of modern desalination plants demand innovative approaches to maximise efficiency while minimising environmental impact. As part of two projects commissioned by Aurecon Australasia Pty Ltd, pioneering engineering solutions were developed.

“What makes this project truly exceptional is the seamless combination of technical precision and sustainable design – from the development of a modular, precast intake structure to the effective dispersion of brine. It demonstrates how innovative engineering solutions can maximise efficiency while safeguarding the delicate marine environment.”

Laxman Rajwani, Managing Director, INROS LACKNER India

I Queensland desalination plant
For this project, reference designs were created for the marine inlet and outlet structures at two proposed sites. The inlet structures were meticulously designed to ensure minimal environmental impact while achieving efficient seawater intake for the plant. This involved careful consideration of wave, current, and sediment dynamics. Similarly, the outlet structures were optimised to enable the safe and effective discharge of brine, adhering to environmental regulations and minimising disturbances to marine ecosystems.

Foundation design and construction strategy for marine environments: Geotechnical and geophysical survey data were thoroughly analysed to develop a robust foundation design capable of withstanding the challenging marine environment. Alternative construction methodologies were proposed to address site-specific constraints, ensuring feasibility and cost-effectiveness. Staging plans were devised to provide a clear and structured roadmap for construction sequences and methodologies, thereby facilitating efficient implementation.

Comprehensive design and sustainable solutions for desalination plant: A comprehensive Basis of Design Report was prepared, detailing all critical design assumptions and parameters. Advanced Building Information Modelling (BIM) models were developed to adhere precisely to the project’s specifications, improving visualisation, integration, and collaboration. Material take-offs were meticulously calculated to enable precise cost estimation and budgeting. Furthermore, a risk register was compiled to identify and mitigate potential risks, ensuring smooth and resilient project execution. With a capacity of 300 ML/day, the Queensland Desalination Plant exemplifies sustainable and innovative design solutions tailored to meet the demands of modern desalination practices.

 I Inlet Structure

I Outlet structure

II Alkimos seawater desalination plant
This project involved the preparation of a detailed tender design for an Australian EPC contractor, focusing on the marine inlet and outlet structures required to support a desalination plant with a capacity of 1,389 litres per second.

 Inlet and outlet structures: The inlet structure was carefully designed to prioritise efficient water intake while excluding marine debris and minimising harm to aquatic life. A low-impact intake system was incorporated, including Cu-Ni screens and velocity caps to manage controlled water flow. Comprehensive hydraulic calculations were performed to optimise functionality. The outlet structure was strategically engineered to ensure the effective dispersion of brine, reducing its concentration and preventing negative environmental effects.

Site-specific precast intake structure and foundation design: Geotechnical and geophysical survey data were extensively reviewed to develop a foundation design capable of addressing the unique challenges posed by site-specific conditions. A precast gravity-based intake structure was designed to overcome site lifting constraints, using modular precast components to simplify. handling, on-site assembly, and connection design.

II Inlet Structure

II Outlet Structure

Strategic engineering and innovative design: Comprehensive staging plans were developed, detailing the sequence of construction activities to ensure smooth project execution. A Basis of Design Report was compiled, documenting all critical design assumptions and considerations. Advanced Building Information Modelling (BIM) models were created to ensure strict adherence to project specifications, enhancing coordination and minimising risks during construction. Material take-offs were prepared to enable precise cost planning and budgeting. This project exemplifies strategic engineering solutions and innovative design, ensuring efficient plant operation while protecting the surrounding marine environment.