Effect of nitrogen source on biodegradation of crude oil by a defined bacterial consortium incubated under cold, marine conditions

摘要

Studies have been carried out using a defined bacterial consortium which degrades crude oil under cold, marine conditions. The type of nitrogen supplement (i. e. ammonium versus nitrate) in the artificial sea water medium used in the experiments Affected the degree of oil biodegradation observed, and was correlated with spent culture medium pH. Supplementation with Ammonium led to progressive acidification of cultures, whereas nitrate amendment resulted in a neutral culture medium. The Presence of ammonium in cultures incubated with the full consortium of strains was correlated with decrease aromatic Fraction biodegradation.