Providing recycled water for use by industry is an excellent way of saving drinking water. Sydney Water is working to maximise the amount of recycled water that can be used for industrial purposes.
Of all the water used in Sydney, residential and commercial properties use around 82% and other types of properties, (including primary producers and government), use 6%. Of the total, just 12% is used by industry.
Sydney Water operates one of the biggest industrial water recycling schemes in Australia, supplying BlueScope Steel in Port Kembla.
Up to 20 million litres of high quality recycled water per day is being delivered to BlueScope Steel from a recycled water plant at Sydney Water's Wollongong Sewage Treatment Plant.
This replaces up to 7.3 billion litres of drinking water per year previously drawn from the local Avon Dam, a 57% reduction of drinking water consumption by Sydney Water's largest customer.
The water recycling plant at Wollongong, which has been operating since 2006, uses micro-filtration and reverse osmosis membrane processes to produce very high quality recycled water suitable for a range of industrial purposes.
This project alone reduced the use of drinking water across the total Illawarra region by 17%. There is potential to expand to other local industries in the future.
The Wollongong Stage 2 scheme supplies highly treated, disinfected recycled water to the Port Kembla Coal Terminal, Wollongong Golf Club (PDF - 145KB) and Wollongong City Council (PDF - 231KB) sports fields.
The Wollongong Stage Two Recycled Water Scheme replaces approximately 1.4 million litres a day of drinking water.
Sydney Water's sewage treatment plants treat and use nearly 15 billion litres of recycled water per year for their treatment processes.
Sydney Water's Operating Licence requires that by 30 June 2009, Sydney Water must have ensured that all sewage treatment plants, (other than Malabar, North Head and Bondi, and storm flow sewage treatment plants at Fairfield, Bellambi and Port Kembla), use at least 85%recycled water for treatment processes.
All relevant plants are already meeting the target, with around 96% recycled water used across all plants - an increase from 50% from five years ago.
A $3.5 million recycled water facility began operation at North Head Sewage Treatment Plant in 2005. It produces up to 1.5 million litres of recycled water a day, saving about 550 million litres of drinking water per year.
This is part of a $150 million program of works at North Head Sewage Treatment Plant, designed to improve the plant's performance and reliability.
The Rosehill/Camellia Recycled Water Scheme will provide high-quality recycled water from a new plant at Fairfield to major industrial customers and a racecourse in Western Sydney. Aquanet Sydney, a division of Jemena, and Veolia Water Australia are delivering the project.
Sydney Water prepared a contract summary (PDF - 292KB) report on the Rosehill Camellia Recycled Water Project, to comply with the Working with Government Guidelines for Privately Financed Projects, December 2008.