Anaerobic Digestion is the process at the heart of our business. Our compost provides an ecological, nitrogen-rich, chemical free alternative to synthetic fertilisers in agriculture. 

Anaerobic Digestion (AD) plant

Established in 2011, our AD plant has been managed by the same experienced operational team since commissioning. Earnside Energy has invested significantly in 2017 to increase the capacity of the plant to 30,000t of food waste per annum, generating around 18,000,000 Kwh per annum

Our plant achieves high levels of operational efficiency. Whilst the AD industry-standard efficiency is approximately 71%, our plant has achieved an average operational efficiency of in excess of 90%.
The food waste we collect is separated from any packaging when it arrives at the Anaerobic Digestion plant, before then being processed into a liquid and fed into large tanks in the absence of oxygen. This liquid food undergoes a natural biological process during the next 30 days where it breaks down into methane and carbon dioxide gases. The methane is used as a fuel to feed a specially designed combustion engine that generates heat and electricity. The heat is used as part of the AD process and the electricity is exported to the grid for use by homes and businesses, across the United Kingdom. 
Anaerobic Digestion also generates large volumes of liquid which is stored in tanks on site. This liquor is then used by our local farmers as a fertiliser. This means Anaerobic Digestion has twin carbon benefits both in terms of reducing reliance on fossil fuels, and by avoiding the use of synthetic fertilisers in our agricultural industry.

So How Does Anaerobic Digestion work?

The diagrams below shows the process of anaerobic digestion that we undertake at Earnside Energy.
The process diagrams show how we transform your food waste into valuable natural resources such as nutrient-rich liquid digestate fertilisers, which contribute to the overall circular economy.

Anaerobic Digestion

Food waste

Pretreatment – depackaging, shredding and liquefaction

Anaerobic digestion

Digestate produced to PAS110 and stored

Digestate used a fertiliser for Agriculture

Biogas produced and stored

Renewable energy produced from Biogas…100% renewable


Power generated is exported for use in Scottish homes and businesses


Ideal for

And much more ...


LAtest NEws