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Identification of Lipid-Degrading Bacterial Strains and Their Potential Applications in Effluent Treatment: Sri Lankan Context
Bimsara Geethachapa, Mihiri Ruwanara, N. P. Mendis and Thilini U. Ariyadasa

Published in: Journal for Advance Research in Applied Sciences
Volume- 4, Issue-7, pp.409-415, Dec 2017
DPI :-> 16.10089.JARAS.2017.V4I7.409415.2268



Abstract
Most of the conventional wastewater treatment methods have proved to be inefficient in treating water contaminated with lipids. The possibility of using microorganisms for this purpose has been investigated in number of previous studies, where their ability to successfully degrade lipids containing in effluents has been verified. This study, focusing on Sri Lankan context, intends to identify suitable microbial strains to be incorporated in wastewater treatment systems to enhance the lipid removal efficiency. A total of 56 bacterial strains, isolated from different local environmental sources, were screened for their lipolytic activity. Several strains were observed to have the potential to degrade lipids at a sufficient rate, where the strain with the highest rate was identified as Pseudomonas aeruginosa. The maximum lipid degradation rate (for synthetic wastewater containing 1% palmitic acid) obtained was 2.46±0.01 free fatty acid percentage (FFA %) at 30ºC during 48 h of cultivation.

Key-Words / Index Term
wastewater, lipid degradation, lipolytic activity, free fatty acids, Pseudomonas sp.

How to cite this article
Bimsara Geethachapa, Mihiri Ruwanara, N. P. Mendis and Thilini U. Ariyadasa , “Identification of Lipid-Degrading Bacterial Strains and Their Potential Applications in Effluent Treatment: Sri Lankan Context”, Journal for Advance Research in Applied Sciences, 4, Issue-7, pp.409-415, Dec 2017. DPI:16.10089.JARAS.V4.I7.2268