Manure-based centralised co-digestion is a Danish biogas production concept that developed in the
late 1980s. Manure and slurries are supplied from several farms to a centrally located biogas plant
for co-digestion with up to 25% digestible wastes. From its early stages of development,
centralised co-digestion of manure was recognised by the Danish society as a multifunctional,
environmentally sustainable concept, able to deliver a number of benefits for the agriculture,
environment, and energy sectors, and society as a whole. In 2016, the annual production of
biogas surpassed 9 PJ, with 75-85% of the produced biogas originating from manure-based
plants. The goal is to increase annual production to 16 PJ by 2020.