Compost

An alternative to converting the cellulose fibre to syngas
is to use the fibre as a virgin feedstock for anaerobic
digestion (can be mixed with sewage cake). This is a
biological process that produces a gas principally
composed of methane (CH4) and carbon dioxide (CO2)
otherwise known as biogas.

These gases are produced from organic wastes such as
livestock manure, sewage sludge and the cellulose fibre
produced by the RCR STAG system. Gas can be stored
and used as alternative green fuel for vehicles or
renewable "green" electricity generation. Digestion rates
of between 30% and 50% are achievable and the biomass
complies with the EU standard for compost of PAS 100.