Figures 3.11 and 3.12 show the pattern in the production of biogas from microwave treated maize straw. Biogas production increased from the day of the first measurement untill around the 16th day for both pretreatment conditions. Production then stabilised for the following week before it started falling around the 24th day. The samples that were treated for four minutes yielded the highest amount of biogas with a sum total of 539.46mL which is an increment of 208% compared with that of the raw maize straw. The samples pretreated for two minutes had a biogas production of 514.07mL of methane. This represents a 194% increase in biogas output with respect to the raw samples. Biogas
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