Haya: The Saudi Journal of Life Sciences (SJLS)
Volume-3 | Issue-02 | 99-104
Original Research Article
Extracellular Enzymatic Assays of Lipolytic Bacteria on Lipid-Rich Abattoir Waste water
Ononiwu Prosper Ikechukwu, Ekwenye, Uchechi N
Published : Feb. 15, 2018
Abstract
Wastewater from abattoirs has great impact on the environments, since it is
made up of a significant portion of organic contents such as lipids containing high
BOD and COD. Amongst other sources of lipid-rich wastewater, in the abattoir
wastewater, a significant amount of bacterial capable of utilizing lipids and other
organic contents has been found. Exploiting the extracellular hydrolytic capabilities
of these microbes is necessary for the overall reduction in the organic contents of the
wastewater. Lipolytic bacterial cultures of Pseudomonas aeruginosa, Staphylococcus
aureus, Klebsiella pneumoniae, and Bacillus subtilis were used in the treatment of the
lipid-rich wastewater with enrichment nutrient combinations. Thus, the extracellular
enzymes; lipase, protease and amylase were assayed at 6hour intervals for a period of
48hours for hydrolytic activity. Bacillus subtilis treatment showed the highest
amylase and protease activity while Pseudomonas aeruginosa showed the highest
lipase activity and high amylase and protease activities with Staphylococcus aureus,
also a good lipase producer. The result indicated extracellular production of the
enzymes to cater for the initial breakdown of substrates in the wastewater medium.
Owing to the enzymatic activities of lipase, protease and amylase possessed by these
lipolytic organisms, they could prove to be beneficial for bringing down the overall
organic load of abattoir wastewater.