Fact
BiogenGreenfinch’s own environmental experts worked with BSI, WRAP and the Renewable Energy Association (REA) to develop the national specification, BSI PAS 110, on which the protocol is based.
Types of anaerobic digestion
There are two main types of AD process. One type achieves hotter temperatures within the digester (thermophilic: up to 60°C) than the other (mesophilic: ~35-40°C). The type chosen depends largely on the feedstock to be processed. All waste is treated in sealed vessels.
We have considerable experience in building and operating both types of digesters. The company has particular expertise with both food waste digesters and farm digesters
Food waste digesters
Commercial plants like our integrated anaerobic digesters can process feedstocks such as:
- Domestic food waste collected by local authorities.
- Commercial food waste.
- Food manufacturing and processing waste.
- Farm materials (animal slurries and energy crops).
Farm digesters
Farm-based anaerobic digesters can process a variety of feedstocks, including animal slurries, energy crops and vegetable waste, to produce:
- Renewable energy for use on site or for sale to the grid.
- Nutrient-rich biofertiliser for use on a farm's own crops
We have not deserted our heritage but are currently focusing our efforts on designing, building and operating a network of food waste digesters around the country. This is in response to the high demand to use anaerobic digestion as a cost-effective and environmentally sustainable solution to the UK’s food waste problem.
