Production of the lactic acid from mango peel waste – Factorial experiment

The production of lactic acid from mango peels using the bio-fermentation method was investigated. the possible relationship between the operational factors, namely process temperature (15 and 35 °c), initial medium ph (4 and 10) and duration of fermentation (3 and 6 days) on lactic acid production as the response was determined using the factorial design. analysis of the data obtained showed there was a strong significant influence of the operational factors and their interactions on lactic acid production (p < 0.0001) of fermenting microorganisms. the regression model for lactic acid production fitted the data adequately and explained more than 99% of the variation in the response. the results also showed that the maximum production of lactic acid can be achieved at initial medium ph of 10; incubation time of 6 days; and at a temperature of 35 °c. the maximum production of lactic acid was 17.484 g/l. this study highlights the potential of mango peels as a low cost and economically viable fermentation substrate for the production of lactic acid.