alone was 2.29 ± 0.97 L/total mass of slurry. When
blended with CD, PD and SD, mean flammable biogas
yield was increased to 4.88 ± 1.73, 5.55 ± 2.17 and 5.65 ±
2.62 L/total mass of slurry respectively.
The main disadvantage of poultry manure is that it
produces a proportion of hydrogen sulphide, which even
when present in only small proportions, corrodes metal
fittings (Ojolo et al., 2007a). It is also poisonous, but
not in the quantities produced (less than 0.075 mL), so
it’s not enough to be a hazard. When it burns in air it
oxidises to sulphur-dioxide.