Back to clients Biogen When Biogen’s AD operations were rapidly expanding in the UK, the food waste specialist turned to UNTHA for shredding technology to support their growing business… Biogen is the UK’s largest operator of food waste anaerobic digestion (AD) plants. The organisation takes organic materials from food manufacturers, retailers, pubs, restaurants, hotels, offices and homes (via local authorities) and processes them to create: – Biogas, which is fed into a Combined Heat and Power unit to produce renewable electricity for the national grid. – A pasteurised PAS110-certified digestate, which is returned to the agricultural industry as a biofertiliser to grow crops.