Cassava  grates  processing  wastes  as  source  ofelectrical  energy

Felix  J. Amestoso,; Daniel Leslie  S. Tan,; Mark Anthony  R. Atanacio,

Cassava grates processing wastes as source ofelectrical energy

Mark Anthony R. Atanacio | Daniel Leslie S. Tan | Felix J. Amestoso

Abstract:

The study aimed to generate electricity from cassava (Manihot esculenta) extract using an improvised microbial fuel cell (MFC) was developed. In its development, a screening experiment using an 8-run Plackett-Burman (PB) design and an optimization procedure following response surface methodology (RSM) were employed. Higher cassava extract concentration significantly increased the generated voltage, while the effect of salt ratio was inversely proportional to the voltage output. One treatment in the 3x3 factorial experiment reached a maximum voltage of 546 mV. Response surface regression analysis showed that linear, quadratic, and cross-product interactions of cassava extract concentration and salt ratio in the salt bridge significantly affected voltage generation. A regression model was developed: E = 106 + 1318x - 4829y - 850x^2 - 787xy + 18032y^2. Canonical analysis showed a minimum response at the stationary point within the factor level space, equal to 211 mV. Salt ratio levels lower than 15% and cassava extract concentrations not less than 60% generated higher voltage values. A t-test showed no significant difference in voltage between days and between the predicted mean and observed mean, which had accuracies of 92.54% and 93.28%, respectively.

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