06/03/26
Carbon - In focus: Biomethane ACCU pathway uncertain
London, 6 March (Argus) — Australia will explore expanding the carbon-crediting
pathway for its nascent biomethane industry, but a potential preference for
renewable gas certificates over Australian Carbon Credit Units (ACCUs) may curb
that development, stakeholders said. The Australian government last month
prioritised the creation of a new Alternative Waste Treatment ACCU method that
could boost emissions abatement by offering a potentially longer crediting
period and by adding biomethane generation as an eligible activity. This could
potentially promote a higher uptake of ACCU projects for biomethane facilities
in Australia, which would help developers and investors to finance new plants,
as well as increase the future supply of carbon credits that companies use in
the compliance market's safeguard mechanism, or for voluntary purposes. But
overlaps between ACCUs and new certification options — the renewable gas
guarantees of origin (RGGOs) under GreenPower's Renewable Gas Certification and
the future product guarantee of origin (PGO) certificates under the Clean Energy
Regulator (CER's) managed guarantee of origin GO scheme — mean that the
carbon-crediting pathway for biomethane may be limited, according to industry
participants. Limited ACCU uptake Participation in ACCU projects has been very
limited under existing or expired methods, although this is mostly because there
are still very few biomethane projects in Australia. There are just two active
ACCU methods that support biomethane facilities: the Animal Effluent method ,
which focuses on reducing methane emissions from animal waste by capturing and
treating effluent, and the Reducing Methane Emissions from Landfill Gas method,
which targets methane reduction from landfill sites by capturing and destroying
landfill gas, converting it to electricity, or upgrading it into biomethane. Of
nearly 30 projects currently registered under the Animal Effluent method, only
two involve biomethane facilities, according to the CER. And there are no
projects registered under the Reducing Methane Emissions from Landfill Gas
method, which was only made late last year . There is also one project involving
biomethane production registered under the Domestic, Commercial and Industrial
Wastewater method, which expired on 31 March 2025. None of these three
biomethane projects have received ACCUs yet, nor projects registered by
bioenergy developer Delorean that do not specifically mention biomethane with
the CER but are expected to generate that product ( see table ). "Since the
making of the biomethane methodologies in 2022, the CER has received enquiries
about the potential eligibility of biomethane projects under the ACCU Scheme," a
spokesperson told Argus . "There has not been any particular trend in these
enquiries and the CER does not produce forecasts on biomethane production for
future ACCU project generation." LMS Energy joins Delorean and other developers
The most recent of these projects — the Wasleys biomethane project in South
Australia (SA) — was registered with the CER in December by Australia's largest
landfill gas operator, LMS Energy, in partnership with Australian pork producer
SunPork. The A$24.1mn ($16.95mn) project, which could become Australia's first
commercial-scale agricultural renewable natural gas facility, will receive
A$10mn of funding from the Australian Renewable Energy Agency (Arena). LMS plans
to use anaerobic digestion to collect biogas generated from animal effluent and
upgrade it to biomethane for use as a natural gas substitute. This would reduce
SunPork's scope 1 greenhouse gas (GHG) emissions. Currently, biogas released
from uncovered piggery effluent ponds is the largest source of emissions for the
pork industry. If successful, the project could overcome regulatory barriers by
establishing and demonstrating clear pathways for the recognition of
agricultural biomethane in carbon crediting and renewable gas certification
schemes, according to Arena. LMS did not reply to questions about the timeline
of the project, plans for future biomethane facilities or challenges around
risks for double-counting or overlap for ACCUs and certificates like RGGOs and
PGOs. Delorean, which last year signed an agreement with utility Origin Energy
to sell biomethane and the corresponding RGGOs from its SA1 Salisbury bioenergy
facility in SA, did not reply either to questions about the expected interplay
between ACCUs and RGGOs from its projects. The company has said its projects
would have potential for several products and revenue sources, including
biomethane, RGGOs, ACCUs and biogenic liquid carbon dioxide (LCO2). Biomethane
from SA1 Salisbury will be delivered via the gas network following a connection
agreement last year with gas network Australian Gas Networks (AGNL), part of
Australian Gas Infrastructure (AGIG). AGIG did not reply to questions either.
RGGOs and ACCUs to be stapled and retired together Under rules set by
GreenPower, ACCUs created from projects under the Animal Effluent, Reducing
Methane Emissions from Landfill Gas, or any other methods, would need to be
stapled with RGGOs in case the latter are also created in respect of the same
activity. The ACCUs and RGGOs would then need to be retired together to the same
entity, to avoid double counting, GreenPower's renewable fuels team lead Brad
Bailey told Argus . There is just one facility currently accredited to create
RGGOs — gas pipeline and power distribution firm Jemena's Malabar plant in
Sydney in New South Wales (NSW). RGGOs have been already issued to the 95 TJ/yr
(2.5mn m³/yr) facility, but not yet retired. Two biogas or biomethane projects
are in the process of obtaining accreditation, and more than 30 projects have
expressed interest in participating, Bailey said. While it would be up to the
end customer to surrender either the ACCUs or RGGOs stapled together, Jemena
anticipates the use of RGGOs for market trading as these certificates can be
used by consumers for emission reduction rather than offsets, renewable gas
general manager Suzie Jakobovits said. "Jemena supports additional ACCU methods
that recognise biomethane as low-emission fuel. But while ACCU pathways are
valuable, more recent policy advancements have provided a more valuable
incentive for biomethane production," she said, noting the renewable gas
certification schemes and their allowed use from July to reduce scope 1
emissions under the National Greenhouse and Energy Reporting (NGER) scheme.
Jemena has not been developing any further biomethane projects of its own. It
has instead signed initial contracts with project developers including Optimal
Renewable Gas (ORG), Valorify, Sojitz and Gwydir Circular Economy to potentially
connect their planned biomethane facilities into its gas network. "It will be up
to the biomethane producer to determine whether to register for ACCUs and/or
renewable gas certificates," Jakobovits said. More support needed For ORG
managing director Mike Davis, the new Alternative Waste Treatment ACCU method
could be potentially more flexible to transfer emission benefits from the
current pathways to anaerobic digestion plants. But the company sees RGGOs as
"more valuable than ACCUs" as they are recognised as a scope 1 emission
reduction pathway rather than an offset, he said. Other biomethane developers
like Valorify, as well as major waste management firms such as EDL Energy,
Cleanaway and Veolia — which are among Australia's largest landfill gas ACCU
project operators — did not respond to requests for comment. Waste management
firm LGI said it is not currently involved in biomethane projects. Australian
gas pipeline operator APA declined to comment. The firm launched in 2024 a
public round of expression of interest for potential biomethane supply projects,
but decided not to proceed because of a combination of technical and commercial
factors unique to the project. Beyond the RGGO, PGO and ACCU pathways and the
NGER change last year, the biomethane industry will need further government
policy and financial support, Jakobovits said. She highlighted the NSW
government's A$170mn Renewable Fuel Strategy launched in November to support
renewable fuel and biomethane production in the state. "This support is only
available in NSW. Other states or federal government support is required to
stimulate biomethane production in other states," she said, suggesting policies
like the development of a national renewable gas policy approach and the
recognition of biomethane as a priority industry under the Future Made in
Australia and as a priority investment area within Arena. ACCU projects
supporting biomethane facilities Project Developer Method Crediting period ACCUs
issued Wasleys Biomethane Project LMS Energy Animal effluent
11/12/2025-10/12/2037 0 UAG Bio Nutrients Facility UAG Bio Nutrients Animal
effluent 15/05/2024-14/05/2036 0 Ryan Group Anaerobic Biodigester Ryan Meat
Company Domestic, Commercial and Industrial Wastewater 25/08/2026-24/08/2038 0
Salisbury Bioenergy Project Delorean Alternative Waste Treatment 2015
25/03/2025-24/03/2032 0 Stanhope Bioenergy Project Delorean Alternative Waste
Treatment 2015 08/03/2025-07/03/2032 0 Stanhope Bioenergy Project Delorean
Animal effluent 20/09/2025-19/09/2037 0 source - CER Send comments and request
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