Anaerobic digestion of organic solid wastes is an established
technology. Anaerobic digestion is an attractive waste treatment
practice in which both pollution control and energy recovery can
be achieved. Many agricultural and industrial wastes are ideal candidates
for anaerobic digestion because they contain high levels of
easily biodegradable materials. The inhibitors commonly present
in anaerobic digesters include ammonia, sulfide, light metal ions,
heavy metals, and organics [14]. Anaerobic co-digestion can increase
CH4 production of manure digesters by 50–200% [15]. The
anaerobic digestion of biomass requires less capital investment
and per unit production cost as compared to other renewable energy
sources such as hydro, solar and wind [16].