This assertion was
confirmed using Duncan multiple range test as seen in
Table 4. Table 4 indicates that on the fifth day the
highest mean value of biogas was recorded which is
significantly higher than the values recorded from the
sixth day and the seventh day (α = 0.05). The sixth day
and the seventh day produced relatively the same quantity
of biogas but were statistically higher compare to the
yield from the fourth, third and second day respectively.
The volumes of produced digestate proved to be
statistically different from each digester as shown in
Table 5. Table 5 shows that using Duncan multiple
range Digester A produced the highest mean biogas of
4.50 mL and this value in Table 6 is shown to be
significantly different than that produced by the Digester
B and Digester C.