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Due to careless waste disposal, illegal waste dumping and accidental spills large number of hazardous
compound are released into the environment. The most common chemicals involved in environmental
contamination are petroleum hydrocarbons, polynuclear aromatic hydrocarbons (PAHs).these products
are hazardous to the surroundings as well as to life forms. The most common technique to remove
pollutants from the natural environment and convert the pollutants to a less harmful product using the
microbiological community of the contaminated environment is bioremediation. Pseudomonas sp. is the
most frequently found bacteria in nature which is used in biodegradation process. Degradation of
petroleum hazards by Pseudomonas sp. sp. is the best carrier based inoculums. Pseudomonas sp.
degrades the various hydrocarbons by the different catabolic pathways. The final products can be carbon
dioxide, water and simpler compounds which do not affect the environment. Pseudomonas sp. used to
biodegrade of Naphthalene, Pyrine and Phenanthrene.
Keywords: Petroleum hydrocarbons, PAHs, Pollutants, Biodegradation, Pseudomonas.