How AD Works

Anaerobic Digestion (‘AD’) is a renewable energy production technology through which animal slurry and fermented silage is digested to form organic fertiliser and bio-gas. The bio-gas (comprising mainly of methane) is then converted into a consistent supply of electricity as part of the process.

A 0.5 MegaWatt plant costing £2 million pounds will generate some 3,850,000 KiloWatt (KWh) hours of electricity with an up-time of 88.5%, which will attract a feed-in tariff of 14.1 pence per KWh plus and export tariff of 4 pence per KWh – almost £700,000 in total per annum. The AD plant for Raw AD’s first project will be provided and installed by AUSTEP S.p.A., a Milan based firm that has installed many biogas plants around the world.


The process used by the anaerobic digestion plant is entirely natural and simple, but the control systems used by AUSTEP S.p.A. are anything but simple. Advanced computerised systems monitor various facets of the plant’s performance 24 hours a day, keeping it safe, efficient and environmentally friendly.