We produce the electricity through a natural biological process called Anaerobic Digestion. In this process, we remove any contaminants form the food waste and blend it with cattle slurry and whey to make a “food soup”.
The soup is then fed into our anaerobic digester along with an energy crop called maize and more cattle slurry. This mix of feeds insure that the microbes in the digester get a balance diet for them to grow and reproduce. As the microbes grow and reproduce they produce natural Methane gas called biogas.
We burn the biogas in two biogas engines. They turn two generators that between then produce 1MW of renewable electricity 24/7. This electricity is used on site and sent to the national grid that supplies electricity to South Wales. The engines also produce heat that is used on site to keep the anaerobic digester at body temperature and to run the pasteuriser.
The microbes don’t only produce Biogas, they also produce a natural biofertiliser called Digestate. The Digestate we use on our home farm to grow grass for our dairy herd. We then receive all the cattle slurry back to make more electricity and more Digestate.