Biodegradation of Lagoma crude oil using pig dung

Abstract

Pig dung bacteria were isolated and screened for crude oil degrading capabilities. The pig dung was also
investigated for enhancement of crude oil biodegradation. Addition of chicken manure to oil polluted soil (at
10% (v/w) pollution level) stimulated the biodegradation of lagoma crude oil used in the present study. In the soil
amended with pig dung, 68.2% of the crude oil was degraded, whereas only 50.7% of same oil was degraded in
the unamended soil. The pH of the amended soil rose from 6.2 to 7.2. Pig dung was found to contain 1.7 x 106
cfu g-1
crude oil degrading bacteria, and 1.8 x 108
cfu g -1
aerobic heterotrophs. The crude oil utilizing bacteria
were identified as species of Pseudomonas, Proteus, Klebsiella, Bacillus and Micrococcus. Pig dung could
therefore be an option for crude oil pollution mitigation project.