PIECING TOGETHER HE US BIOGAS JIGSAW

摘要

With cheap natural gas from fracking and lit-tle by the way of state funding, the use of Anaerobic Digestion (AD) to process food waste in the US has yet to become mainstream. However, a number of states have introduced bans on the landfilling of yard trimming and garden waste, and others including California, Massachusetts, Rhode Island and Vermont have also banned food waste from landfill. In theory this should bode well for the anaerobic digestion industry, but so far even in most of those states implementing such bans, a glut of new AD plants has failed to materialise. In Massachusetts, which banned any establishment that creates 1 ton (907 kg) or more of food waste per week from sending it to landfill, by July 2015 just four of the 49 sites accepting diverted food waste were anaerobic digestion plants - and one of those was a pilot facility.