BIOCHEMICAL CHARACTERISTICS OF A POLYCYCLIC AROMATIC HYDROCARBON DEGRADING BACTERIUM ISOLATED FROM AN OIL REFINERY SITE OF WEST BENGAL, INDIA.

Arun Kumar Maiti, Nandan Bhattacharyya

Abstract


Polycyclic aromatic hydrocarbons are a class of potentially hazardous chemicals. Their contamination of soil and aquifers is of great environmental concern today as humans throughout the world may be exposed to these compounds from different sources. Due to high boiling point and chemical stability they can not be easily removed from the environment either by evaporation or chemical reactions. They are very much toxic; some of them mutagenic, even carcinogenic. Some microorganisms have been able to transform these toxic chemicals to nontoxic ones (bioremediation). The objective of this study is to isolate any potent bacteria from Haldia Refinery site of India that may degrade multiple polycyclic aromatic hydrocarbons (PAHs). An isolate has been identified as Bacillus weihenstephansis DSM 11821 and characterized with properties like multiple PAH degradation, biosurfactant, lipase and gelatinase activity.


Keywords


Bioremediation, biosurfactant, lipase, petroleum oil, polycyclic aromatic hydrocarbons

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