Phenol red has an end point at pH 7.3 - 7.4, where it is red
and a slight decrease in pH (7 - 7.1) turns it to yellow. The
yellow zone around culture confirmed lipolytic activity.
From the result in Table IV, showed two sample areas (G1 and G2) exhibited positive lipolytic activity. Fig. 4 shows the
lipolytic activity of the sample indicated the bacteria
population in the sample as biodegradation agent.