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The WA EPA has recommended conditional approval of New Energy Corporation’s change in technology from gasification to combustion for its proposed East Rockingham waste to energy (WtE) facility.
New Energy Corporation proposed using Hitachi Zosen Inova (HZI) Grate Combustion technology, which the EPA found did not bring any further risks to the surrounding environment or communities.
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The technology allows for a greater waste throughput at the facility, increasing the amount of waste it can process from 225,000 tonnes per year to 300,000, leading to increased electricity generation.
The EPA has also recommended strict new conditions for the proposal to ensure only residual waste is accepted at the WtE facility to be consistent with the state’s waste hierarchy.
The EPA has defined residual waste as “waste that remains after the application of a best practice source separation process and recycling systems, consistent with the waste hierarchy”.
Under the new conditions, WtE proponents will need to develop a Waste Acceptance System Plan and a Waste Acceptance Monitoring and Management Plan to identify the suppliers of waste and describe the types of waste, waste loads and quantities accepted.
WA currently has four approved WtE facilities, however none are in operation.
EPA Chair Tom Hatton said the HZI technology is used widely around the world, having been tried and tested in more than 500 plants.
“While the gasification technology originally proposed for the facility was also deemed to be acceptable by the EPA, the combustion technology has been used in a number of facilities of a similar scale, and we have determined it does not pose any additional risks to the surrounding environment and community,” Dr Hatton said.
Environment Minister Stephen Dawson will make the final decision for the proposed change. The EPA’s report is also open for a public appeal period which closes Monday 5 November.