Acording to National Grid “Renewable gas has the potential to make a significant contribution to the UK’s renewable energy and carbon reduction targets for 2020. And in the longer term, with the right government policies in place, renewable gas could meet up to 50% of UK residential gas demand. Produced mainly via a process of anaerobic digestion (AD) or thermal gasification of the UK’s biodegradeable waste, renewable gas represents a readily implementable solution for delivering renewable heat to homes in the UK.
Renewable gas can also deliver greater security of energy supply for the country as well as a solution for waste management as UK landfill capacity declines. In terms of the cost to the UK of delivering renewable gas, it is estimated that the marginal cost (i.e. that over and above the cost of the waste infrastructure which must be built anyway in the UK to deal with reducing landfill capacity) would be in the region of £10bn. This cost compares well with the likely cost of delivering other large scale renewables such as wind.
Full report at: Renwable Gas