Organic waste can be recycled via two methods on an industrial scale – most commonly through anaerobic digestion (which is what our waste provider, Liliwaste, does).
In anaerobic digestion, bacteria break down organic materials in the absence of oxygen, to produce biogas (mainly methane and carbon dioxide) and digestate.
The biogas naturally created in the sealed tanks is used as a fuel in a CHP (combined heat and power) unit to generate renewable energy, i.e. electricity and heat.
What’s left from the process is digestate – a nutrient rich biofertiliser which is pasteurised to kill any pathogens and then stored in large covered tanks ready to be applied twice a year on farmland in place of fossil fuel derived fertilisers.