Biomethane
Realising the potential What’s certain is that there are clear benefits to using biomethane both for heat and as a transport fuel. Despite the sector’s upward growth trajectory, if its potential is to be fully realised, a significantly greater volume of home-grown green gas will need to be produced in the years to come. “The AD industry as a whole currently produces 9 TWh per year; only 25 per cent of the 35 TWh that it could generate if all suitable feedstocks were sent to AD using existing technology,” says ADBA’s Thom Koller. “With investment in research, this 35 TWh could become closer to 80 TWh. Research to improve the energy output potential of AD in the UK needs to be focused in areas such as pre-treatment technologies for high-lignin feedstocks, improved yields, lower parasitic load process equipment and biomethanation of renewable hydrogen.”
The CCC agrees that anaerobic digestion, and the production of biomethane in particular, has significant untapped capacity. “Our scenarios assume that biogas can deliver around 21 TWh of gas into the gas network by 2030, which would represent around three per cent of natural gas consumption in that year, under our central scenario,” explains the CCC’s David Joffe. “We also assume a small amount of biogas use at or close to the site of production, due to geographical constraints around injection into the gas grid, both for heat generation on farms and a small amount of distributed power generation.”
David continues: “The emissions savings come primarily from displacing natural gas consumption, but also from the local generation of heat and/or power, plus the avoided methane emissions from landfill and on farms by digesting these wastes in a controlled way; capturing the methane for energy use rather than allowing it to escape into the atmosphere. This combination
ADBA is continuing to push government for greater recognition of the role
biomethane can play in cutting transport emissions and improving air quality
would provide GHG emissions savings in excess of 5 MtCO2e/year by 2030. For comparison, the overall savings in our scenario by 2030 are 192 MtCO2
year, so this is again around three per cent – a useful contribution towards meeting the UK’s overall decarbonisation targets.”
www.octego.com
www.amurenergy.co.uk www.biogaspower.co.uk www.ecotricity.co.uk
www.redkitemanagement.com
www.nationalgrid.com www.futurebiogas.com www.airliquide.com
www.greengastrading.co.uk
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www.host-bioenergy.co.uk www.adbioresources.org adbioresources.org
info@host-bioenergy.co.uk SPRING 2017 | AD & BIORESOURCES NEWS 13
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