ABSTRACT
The conversion of biomass to biogas, which typically contains 55–75 per cent methane (Karellas et al., 2010) depending on the feedstock and anaerobic digestion (AD) technology used, is one of the major advantages of AD (Persson et al., 2006). However the rate of biogas production is a function of the biochemical process and is prone to fluctuations during long-term continuous digestion. Depending on the nature and role of the AD process (i.e. bioenergy production or waste treatment with biogas production as co-product) gas storage and distribution has a significant role in the overall process scheme, hence, the associated investment costs for the project.
