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Melbourne Water's Eastern Treatment Plant at Bangholme treats about 40% of Melbourne's sewage, or about 370 million litres a day. Recycled water from the plant is used in operations both onsite and offsite.
In 2004/05, 13,408 million litres of the plant's treated effluent was used onsite in day-to-day operational activities, including cleaning screens, washing work areas, cooling, steam cleaning and irrigating landscaped areas.
The Eastern Treatment Plant began selling recycled water in the 1970s. In 2004/05, South East Water’s customers along the plant's 56-kilometre outfall pipeline used 1389 million litres of recycled water for use in agriculture, horticulture and vineyards, or to irrigate golf courses and sporting fields.
Eastern Irrigation Scheme
The Eastern Irrigation Scheme aims to deliver about 5000 million litres of Class A recycled water each year to the Cranbourne-Five Ways area for the irrigation of market gardens, golf courses, a racetrack and for use through a dual pipe system in residential developments for toilet flushing and irrigation. Melbourne Water provides recycled water to a private sector operator, TopAq who undertake further treatment using ultrafiltration membranes to produce Class A quality recycled water.
TopAq delivers the Class A recycled water to a range of customers via 50 kilometres of transfer and distribution pipelines. TopAq will own and operate the Eastern Irrigation Scheme for 25 years under a partnership arrangement with Melbourne Water. TopAq is a trading name of Earth Tech, a global water, environmental and infrastructure services company. More information is available at www.topaq.com.au
The Sandhurst Club in Carrum Downs was the first recycled water customer to be connected under this scheme to irrigate its two 18-hole golf courses. The 1850 homes in the Sandhurst residential development will also be connected to the scheme. The Sandhurst development will ultimately use 1200 million litres of recycled water a year for the golf courses and recreational areas, as well as for residential use in watering gardens and toilet flushing. Retail water company South East Water will provide the recycled water retail services to residential customers within the project area.
View Eastern Treatment Plant Recycled Water Quality Data.
Recycled water to Gippsland
In June 2004, the Victorian Government announced the Eastern Water Recycling Proposal as part of its action plan, Our Water Our Future. The proposal recommended that a study be undertaken to determine the feasibility of transferring recycled water from the Eastern Treatment Plant to the Latrobe Valley. The feasibility study could lead to a massive infrastructure project that has the potential to use up to 80% of the plant's treated effluent. The study will take about 18 months to complete.
If approved, the project would involve building a 135-kilometre pipeline from the plant to the Latrobe Valley. Recycled water could be supplied to the Latrobe Valley's power stations, paper industry and new industries, substituting the use of surface water from the catchment.
South East Community region and local councils
More than 20 golf courses and 17 council parks are situated within the area of south-east Melbourne often referred to as the South East Community region, which broadly covers the Bayside and Kingston council zones as well as parts of Monash, Casey and Greater Dandenong.
The proliferation of golf courses and council reserves presents a significant opportunity for recycled water to replace other water sources for irrigation, with horticultural businesses, residential developments and even industrial areas also potentially contributing to future demand.
Melbourne Water and South East Water are investigating the potential for a major water recycling scheme to the region.
Frankston and Mornington Peninsula
Recycled water could replace about 200 million litres a year of drinking water and 8000 million litres a year of groundwater in projects near the pipeline between the Eastern Treatment Plant and the South East Outfall at Boags Rocks on the Mornington Peninsula. Target sites include recreational reserves, golf courses, orchards and vineyards in the Moorooduc area, and high-value vegetable crops in the Boneo irrigation area.
We are working with South East Water, EPA Victoria and other key stakeholders to maximise the potential for attracting new recycled water customers and displacing the use of other water resources.
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