Effect of nitrogen and phosphate limitation on utilization of bitumen and production of bitu-oil and gas by a bacterial consortium

Five strains of bacteria; Pseudomonas fragi, Streptococcus zymogenes, Pseudomonas aeruginosa, Pseudomonas fluorescens and Bacillus macerans, capable of utilizing bitumen as source of carbon and energy were isolated from water sample obtained from bitumen producing area, Agbabu, Ondo state, Nigeria. The degradation of bitumen was found to be associated with the production of carbon (IV) oxide, natural gas and oil. As a result of using nitrogen limited and phosphate limited media, 1750 and 1250 cm super(3) of gas and 0.95 and 0.85 g/l of oil were obtained respectively. Nitrogen and phosphate limitation have profound effect on bitu-oil and gas production.