Parameters used in selecting the feedstocks used in
this study include those reported by Nagamani and
Ramasamy (2007). These parameters include economic
considerations, methane yield of the feedstock, bacterial
physiology, and quality of the end-product required.
The economic considerations include labour involved,
cost, availability and nearness to the point-of-use of the
feedstock. Eze et al. (2007) reported that if all the
livestock wastes in Nigeria are recovered and utilized to
produce methane, approximately 7% – 10% of the total
energy consumption could be replaced. It was reasoned
that the availability of animal-based feedstock,
particularly in rural areas, could provide successful
operations for biogas digesters. Animal dungs are
available throughout the year, moreover, both dry and wet
dung could be used as feed stocks.