The pH of the medium was adjusted to 7.0 and sterilized by autoclaving at 121 °C for 15 min. After inoculation, the flasks were incubated at 40 °C under static condition. Samples were collected at every 24 h up to two days for initial studies and at 48 h during media component screening studies. Cells were harvested by centrifugation at 9000g for 10 min and clear supernatant was subjected to lactic acid estimation.