Table 2: Energy content of biogas from different digesters.

TemperatureDigester inputEC (Btu/ft3)EC (MJ/m3)

Room temperaturePig598.522.3
Cow591.222.0
Chicken543.920.3

MesophilicPig577.621.5
Water hyacinth616.723.0
Kitchen waste569.421.2
Chicken588.521.9
Cow559.420.8
Cow + pig mix592.222.1

ThermophilicPig588.521.9
Cow557.520.8

      Average580.321.6