Anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) has been widely implemented in Europe throughout the last decade (De Baere, 2006). The main factors underlying this increase include: (i) European legislation limiting landfill treatment of biodegradable waste (99/31/EC), (ii) increase in source sorted collection of waste, and (iii) anaerobic treatment of biodegradable fraction resulting in enhanced energetic valorisation.