Bayswater Power Station – Delivering optimal environmental and water reuse outcomes
In 2006, Macquarie Generation awarded a contract to Veolia’s water technologies business to upgrade its ageing water treatment plant, which included a five year term for operations and maintenance.
THE CHALLENGEBayswater Power Station is owned and operated by Macquarie Generation, a state-owned corporation established in 1996. This coal-fired power station has a capacity of 2,640 megawatts. It has been in service since the mid-1980s and holds the Australian record for annual energy production. Bayswater Power Station is located in the upper Hunter Valley region of New South Wales, approximately 230 kilometres north west of Sydney.
Macquarie Generation required a solution that would deliver high levels of treatment needed to minimise scaling and corrosion in the cooling water systems and produce a concentrated waste stream.
THE SOLUTIONIn 2006, Macquarie Generation awarded a contract to Veolia’s water technologies business to upgrade its ageing water treatment plant, which included a five year term for operations and maintenance by Veolia.
The upgrade included eight new Actiflo® clarifiers, one new brine concentrator and one new brine crystalliser. Existing water treatment processes including reverse osmosis, have also been refurbished to improve water quality targets.
The upgraded plant now has the capacity to remove in excess of 25,000 tonnes of salt from the cooling water systems. The upgrade was completed in 2007 and Veolia continues to operate the plant under a Design, Build and Operate contract.
The water treatment plant is minimising environmental impact by maximizing the recycling and treatment of cooling water. The plant also reduces the level of salt contained in Lake Liddell, which is a partial source of water for the power station.
In 2011, Veolia was re-selected by Macquarie Generation as its ongoing alliance partner to operate and maintain the cooling water treatment plant at Bayswater Power Station. Under this alliance partnership contract, the client will periodically review performance and conduct a market test every five to seven years.
THE RESULTThe successfully completed upgrade allows for the removal of salt from the cooling water system for both the Liddell and Bayswater Power Stations, reducing scaling and corrosion in the cooling water systems.
Key benefits to Macquarie Generation included:
- Improved water quality that has increased water recycling volumes
- Ensured a more efficient use of water
- Reduced the level of salt discharged into Lake Liddell
- More than 150,000 lost time injury free hours by the Veolia operations and maintenance team at the water treatment plant at Bayswater Power Station.
- Capacity to remove in excess of 25,000 tonnes of salt from the cooling water systems
- 150,000 lost time injury free hours for operations and maintenance