HYDROCARBONOCLASTIC BACTERIA PDF

Specialized hydrocarbonoclastic bacteria (SHCB), which use limited carbon sources with a preference for petroleum hydrocarbons, were found. Petroleum microbiology is a branch of microbiology that deals with the study of microorganisms that can metabolize or alter crude or refined petroleum products. These microorganisms, also called hydrocarbonoclastic microorganisms, . ” Most Hydrocarbonoclastic Bacteria in the Total Environment are Diazotrophic, which. The marine hydrocarbonoclastic bacterium Alcanivorax borkumensis is able to degrade mixtures of n-alkanes as they occur in marine oil spills. However.

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By using this site, you agree to the Terms of Use and Privacy Policy. More Bookmarks Digg etc. Hydrocarbonoclzstic products and microorganisms are useful in these applications and each will yield different results.

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Support Center Support Center. While the petroleum refinery and petrochemical industries are hydrocarbonoclastc desirable for national development and improved quality of life, the unwholesome and environmentally unacceptable pollution effects of the waste from these industries are causes for worry Nwachi and Warigbani, Author information Article notes Copyright and License information Disclaimer.

Open triangles, NaNO 3 -containing medium with nitrogen gas; closed triangles, NaNO 3 -containing hydrocarbonoclaxtic without nitrogen gas; open circles, NaNO 3 -free medium with nitrogen gas; closed circles, NaNO 3 -free medium without nitrogen gas.

Often in the process of degrading a pollutant, a microbe can create baxteria or byproducts that are also harmful, sometimes even more harmful than the original substrate. When further supplied with sufficient limiting nutrients such as nitrogen and phosphor, it grows and produces surfactant glucolipids to help reduce surface water tension and enhance hydrocarbon uptake. The growth curves in Fig.

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Hydrocarbons are recalcitrant because of their oily nature and poor water solubility. The predominant bacterial detected by both dependent and independent approaches were the Proteobacteria. Previous studies, mainly from our laboratory, described the combined potential hydrocarbonoclastid certain bacterial species for hydrocarbon utilization and nitrogen fixation.

Consortia of HCB can have broad spectrum hydrocarbonoclastic potential than individual strains. Hydrocarbonoclastic bacteria isolated from petroleum contaminated sites in Tunisia: Developments in Biodeterioration of Hydrocarbons.

Petroleum microbiology – Wikipedia

Biosurfactants can enhance the availability of bound substrates by desorbing them from surfaces e. Hydrocarbons are principle constituents of petroleum, related byproducts like coal tar, diesel, petrol, gasoline, kerosene and major environmental pollutants. It constitutes the primary mechanism for the elimination of hydrocarbons from contaminated sites by natural existing populations of microorganisms.

Soil bacteria mentioned above are also found in freshwater as they are carried by rainwater runoff, water drainage or via discharge of effluents. National Center for Biotechnology InformationU. COD reduction by bacterial isolates from Refinery effluent. hyddocarbonoclastic

Most 12 species of these species belonged to Alphaproteobacteria and Gammaproteobacteriawhich was consistent with previous findings on hydrocarbonoclastic bacteria in contaminated sediments and seawater from a refinery harbor in the north of Tunisia Attenuation of oil pollutants in the Arabian Gulf water by bacteria naturally associated with live fish. The percentage reduction of the organic components in treatments having Pseudomonas aeruginosa, Serratia marcescens, Klebsiella pneumoniae, Proteus vulgaris, Streptomyces spp.

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There was only minimal growth, if any, in the NaNO 3 -free medium with the top space free of nitrogen gas. Quantitative studies on marine biodegradation of oil. Isolation of Hydrocarbonoclastic Bacteria 2. Typical gel electrophoresis bands of amplified nifH genes in the genomic DNA extract from the bacterial species tested.

IPPW-3 nitrogenase iron protein nifH gene. Open in a separate window. Sphingomonas dokdonensis 1 and Marinobacter Bacteriq. Please review our privacy policy. Study of nitrogen fixation in microbial communities of oil contaminated marine sediment microcosms.

Emulsification at this stage increases oil-water interface and faster rate of utilization and decomposition of oil substrates. Retrieved from ” https: Fifteen out of these 82 species were selected for further study based on the predominance of most of the isolates in their specific sites. All five bacterial isolates manifested no lag phase of growth. We do not endorse these articles, we are neither affiliated with the authors of these articles nor responsible for their content.

Limitation by nitrogen and phosphorus.

Petroleum microbiology

Hydrocarbono-clastic means degrading hydrocarbons or simply ‘eating’ or ‘breaking’ the hydrocarbon molecules. Table 3 shows the quantitative data of oil consumption by the individual bacterial species in the presence and absence of NaNO 3 in the medium and nitrogen gas in the head space.

Materials and Methods 2.