Green Waste 1233444

The AD process begins when biomass is put inside a sealed tank or digester.Naturally occurring micro-organisms digest the biomass, which releases a methane-rich gas biogas) that can be used to generate renewable heat and power; this helps cut fossil fuel use and reduce greenhouse gas emissions.The remaining material digestate) is rich in nutrients, so it can be used as a fertiliser.

Many forms of biomass are suitable for AD; including food waste, slurry and manure, as well as crops and crop residues. However, woody biomass cannot be used in AD because the micro-organisms can't breakdown the lignin, the compound that gives wood its strength.

AD is not a new technology, it has been used in the UK since the late 1800s, but now an increasing number of AD plants are being built in the UK to generate clean renewable energy. AD is also used to treat the waste produced in homes, farms, supermarkets and industries across the UK. This helps divert waste from landfill.