Hobart McRobies Gully Landfill Gas Abatement Facility

Hobart McRobies Gully Landfill Gas Abatement Facility is a landfill gas capture and electricity generation methodology project located in South Hobart, just a few kilometres west of the Hobart central business district in Tasmania. Registered in August 2013, the exact carbon project area size is not specified in the registry, though it operates within the footprint of the McRobies Gully Waste Management Centre which spans approximately 160 hectares. The regional land use transitions rapidly from urban residential zones into the densely forested, natural bushland foothills of Mount Wellington. The area experiences a temperate maritime climate characterised by moderate rainfall. The natural soil profiles in this region typically consist of texture-contrast soils like sandy clay loams over dolerite or mudstone-derived clays, though the project site itself consists of heavily modified, engineered earth used for municipal waste disposal.

Landfill gas projects operating under the electricity generation methodology involve installing active collection systems to capture methane-rich biogas emitted by decomposing organic waste. Instead of allowing this highly potent greenhouse gas to vent into the atmosphere, the gas is extracted and sent to a combustion device, such as a generator, to produce renewable electricity and convert the methane into less harmful carbon dioxide. To earn Australian Carbon Credit Units (ACCUs), operators must strictly monitor the volume and methane concentration of the captured gas to calculate the baseline emissions that were successfully abated.

This project has evolved significantly over its operational lifetime, having transitioned from a revoked legacy Carbon Farming Initiative (CFI) method in 2015 through to the current 2021 electricity generation methodology. It has also changed hands multiple times; the proponent role moved from AGL Energy Services to the Sustainable Energy Infrastructure Trust, before being taken over by Australia's largest landfill biogas operator, LMS Energy Pty Ltd, in early 2022. A Carbon Abatement Contract (CAC354956) was secured for the facility in April 2015 and successfully completed in February 2023. As an interesting local environmental note, the City of Hobart recently installed a $600,000 gross pollutant trap just downstream of the facility to prevent escaped landfill litter from entering the Hobart Rivulet, a measure specifically designed to protect the local native platypus population from dangerous debris.