From our paper:
Rafaela Lora Granado, Adelaide Maria de Souza Antune, Fabiana Valéria da Fonseca, Antoni Sánchez, Raquel Barrena, Xavier Font.; Technology Overview of Biogas production in anaerobic digestion plants: A European Evaluation of Research and Development. ; Renewable and Sustainable Energy Reviews, 80, 2017, pp 44–53.; Doi: https://doi.org/10.1016/j.rser.2017.05.079
Abstract from: UAB Divulga
Anaerobic digestion (AD) technology is used commercially around the world, especially in Europe, which has set some challenging targets to diversify its energy mix with more renewable energy. AD is not a new technology. It was already known in the 17th century, but it was only in the 1980s that it started to be used more widely for treating industrial and municipal wastewater, sewage sludge or municipal solid waste. As it is now a mature technology, it could be key to reducing organic waste, recovering the energy contained in biomass, and generating biofuels and energy.