Variation of biogas yield, methane yield has been plotted with temperature for sample A and for
sample B as shown in fig. 5. Figure shows biogas as well as methane yield is increased as the temperature
increased from 200C to 380C for both these cases. But the rate of increase in gas production is observed higher
for sample A than that of sample B due to increase in growth rate of microorganisms with temperatures. The
observed increase in methanogenic activity caused by increase in temperature varies from study to study (6, 7,
8). Furthermore, half saturation constant of acetate methanation has been reported both to increase and decrease
at lower temperature (9, 10).