Ralph Buchanan Maddan

Agrivert Ltd. provides organic waste management and sewage treatment services to the waste and water sectors. It offers anaerobic digestion and in-vessel composting technologies to treat source segregated food, green and co-mingled wastes. The company was founded by Ralph Buchanan Alexander in 1994 and is headquartered in Chipping Norton, the United Kingdom.

Severn Trent Green Power Holdings Ltd. operates as a holding company through its subsidiaries provides organic waste management solutions. The company was founded on August 18, 2015 and is headquartered in Chipping Norton, the United Kingdom.

Agrivert Renewables Ltd. is a British company that provides resources and information about the organic waste, renewable energy, and anaerobic digestion industry. The private company was founded in 2018 and is based in Chipping Norton, UK. The company also provides expert engineering, consultancy, technical, and operating solutions for anaerobic digestion organic waste treatment in the UK and internationally. The company offers tailored solutions and turnkey projects for the organic recycling and renewable energy sector. The company has received many awards over the years, including the best AD plant of the year for two consecutive years and the best AD team of the year. Agrivert's growth and success in organic waste and renewable energy infrastructure have been continuous for nearly 30 years. The company has plant operation teams that deliver operational and maintenance excellence by maximizing efficiency and minimizing the downtime of biogas plants.