Anaerobic Digestion (AD)

Agricultural Services

Anaerobic Digestion is well suited to wet agricultural wastes, residues and crops. Agricultural AD is defined as facilities using only feedstock derived on-farm, and therefore not subject to waste regulations.There are a number of opportunities, ranging from small-scale on-site digestion and energy use, to larger centralised facilities taking feedstock from a number of farms to benefit from economies of scale. Transfer of crop feedstock between farms is straightforward, however transfer of slurries and manures is more complex and biosecurity risks must be considered.

Digestate is easier to manage from agricultural facilities, as the land that previously received the raw manures or slurries, or the land used to grow crops to feed the plant can be used for spreading. This offers the added benefit of reducing reliance on fossil fertilisers and can offer significant cost savings which should be considered as part of the economic model.

Dependent on scale and feedstock, different regulations and incentives apply. The respective pages on this site provide all the necessary information; a specific page has been written for small-scale developers, focusing on opportunities in the 25 – 250kWe bracket.

The NFUs vision is for 1000 AD plants to be installed on farms by 2020, so the growth potential is significant. Currently operational agricultural plants can be viewed on the Biogas Map.

The menu on the right-hand side of this page will help you navigate to information on every stage of the AD process from feedstock through to digestate, and to examine the economics of agricultural AD.

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