Keywords: bacteria, chicken manure, biodegradation, petroleum pollution, soil contamination, environmental pollution, crude oil, pollution remediation
Biodegradation of crude oil in soil using chicken manure
To investigate enhancement of crude oil biodegradation by adding microbes to the contaminated soil, chicken manure was put into oil-polluted soil (at 10% v/w pollution level). In the soil amended with chicken manure, 72.5% of the crude oil was degraded, whereas only 52.7% of same oil was degraded in the unamended soil. The remedied soil contains 1.4 × 106 CFU g−1 crude oil-degrading bacteria, and 1.1 × 108 CFU g−1 aerobic heterotrophs. The crude oil-utilising bacteria were identified as species of Pseudomonas, Proteus, Enterobacter, Bacillus and Micrococcus. Chicken manure is therefore promising for crude oil pollution remediation.