In this investigation, glucose was produced from rice straw using cells of Aspergillus niger, isolated from maize grain. Glucose yield was found to increase from 43 to 87% as the rice straw particle size decreased from 425 to 75 µm, while the optimal temperature and pH were found within the range of 45 -50°C and 4.5 -5 respectively. The concentration and rate of glucose production was observed to depend on pretreatment of rice straw, substrate concentration and cell loading. A kinetic model rate expression has been developed for such a process based on the Michaelis -Mentens and LineweaverBurk approach. Comparison between the experimental data and those predicted from the rate model indicate good agreement with a mean absolute deviation of about 0.2.
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