Project Details

Site OwnerWestern Water
Commission Date2017
Fuel SourceBiogas
FacilityWastewater Treatment Plant
LocationSurbiton Park, NSW
System ApplicationCombined Heat & Power (CHP)
Waste to energy


The Surbiton Park Recycled Water Plant (RWP) treats sewage from Melton and surrounding towns. Sludge from the treatment process is anaerobically digested producing biogas. As part of their 2018 anaerobic digester upgrade, Western Water have upgraded their biogas generator to a microturbine system with cogeneration capabilities.

Optimal supplied 3 x C65 microturbines with biogas conditioning equipment in 2017, with the inclusion of an LPG blending facility to ensure continuous operation of the turbines, despite the high degree of variability at the site.

Following the successful operation of the initial 3 microturbines, and upgrades to the biogas production facility, Western Water recently increased their microturbine installation to 5 x C65 microturbines, with the addition of a second biogas compressor.

The modular nature of the microturbine installation and the ability to manage biogas supply, through the innovative blending of LPG, and the increased compressor capacity, means Western Water has a robust and reliable microturbine powerplant that is available throughout the year, and is not impacted by seasonal biogas production variations. Using the provided system, they can also export electricity, primarily during peak price events.