Digester B increased progressively from the
first day through to the fifth day and droped relatively on the sixth day but then increased sharply on the seventh day to about 7.21 mL. Optimum biogas production was not attained in this case as there was evidence from the Figure 3 to suggest further production. Digester C rose progressively from 0 mL from the start of the experiment to about 6.72 mL on the fifth day and then decreased the two remaining days of the study. Optimum gas production could be said to be attained on the fifth day since it recorded the highest mean biogas within the time frame for Digester C. Generally the study shows that biogas production increased from the begining of the study and as the days increased, reached an optimum value in a given time and decreased after optimum gas production. From the gas production analysis, average volume of biogas was maximum in Digester A (P = 75%, C = 25%) producing 3.84 mL, followed by Digester B (P = 50%, C = 50%) which produced total biogas of 3.54 mL and Digester C (P = 25%, C = 75%) producing the least biogas of 3.19 mL.