The dominance of anaerobic hydrocarbon degradation, including methanogenesis, in subsurface biodegradation of oil is supported by the lack of sufficiently oxygenated formation waters to oxidize subsurface petroleum, the presence of anaerobic microorganisms in formation waters, the demonstration of anaerobic hydrocarbon degradation in laboratories Hydrocarbon degradation and response of seafloor sediment bacterial community in the northern Gulf of Mexico to light Louisiana sweet crude oil. Subjects. Abstract. The Deepwater Horizon (DWH) blowout resulted in the deposition to the seafloor of up to 4.9% of 200 million gallons of oil released into the Gulf of Mexico. PAH degradation of crude oil was examined in liquid medium at every 15 d of interval up to 45 d and the residual PAHs quantified. The concentration of major PAHs present in the Digboi crude oil was 10, 1.9, 3.5 and 6.5 mg L −1 of naphthalene, fluorene, phenanthrene and benzo(b)fluoranthene respectively. The degradation efficiency of five bacteria individually and in a consortium, was studied in presence of biosurfactant. Colwell et al. (1978) proved that the Metula crude oil degradation through mixed cultures of marine bacteria is possible at 30 °C. Leahy and Colwell (1990) reported that the biodegradation of petroleum in soil occurs at −1.1 °C. PAH biodegradation in estuarine sediment is limited at low winter temperatures (Shiaris, 1989).

Colwell et al. (1978) proved that the Metula crude oil degradation through mixed cultures of marine bacteria is possible at 30 °C. Leahy and Colwell (1990) reported that the biodegradation of petroleum in soil occurs at −1.1 °C. PAH biodegradation in estuarine sediment is limited at low winter temperatures (Shiaris, 1989).

Crude oil degradation was observed in water samples from three sites along the course of a polluted stream in Lagos, Nigeria. Consistent increase and  Progressive degradation of crude oil tends to remove saturated hydrocarbons first, concentrating heavy polar and asphaltene components in the residual oil. This leads to decreasing oil quality by lowering API gravity while increasing viscosity, sulfur, and metal content. The dominance of anaerobic hydrocarbon degradation, including methanogenesis, in subsurface biodegradation of oil is supported by the lack of sufficiently oxygenated formation waters to oxidize subsurface petroleum, the presence of anaerobic microorganisms in formation waters, the demonstration of anaerobic hydrocarbon degradation in laboratories Hydrocarbon degradation and response of seafloor sediment bacterial community in the northern Gulf of Mexico to light Louisiana sweet crude oil. Subjects. Abstract. The Deepwater Horizon (DWH) blowout resulted in the deposition to the seafloor of up to 4.9% of 200 million gallons of oil released into the Gulf of Mexico.

6 Jun 2019 AbstractNew bacterial strain BN66 was isolated by selective enrichment, identified as Bacillus cereus and proved to degrade crude oil, together 

Heavy crude oil spillage is even more difficult to remediate, due to its hydrophobic, toxic constituents, and its partial or incomplete degradation leads to even more toxic intermediates in the affected environment. Harmful effects of crude oil spills are often observed in marine mammals, birds, and land-based animals, including humans. Microbial degradation of petroleum hydrocarbons is one of the major practices in natural decontamination process. The present study investigated about the isolation of bacteria from crude oil contaminated site and gravimetric analysis of degradation in which, two bacterial isolates formed maximum clearing zone on mineral salt medium.

The degradation rate of petroleum hydrocarbon in the actual environment is the result of these factors acting on the petroleum hydrocarbon-degradation bacteria, which has led to most microbial remediation technologies taking a long time, especially when compared to physico-chemical remediation techniques.

22 May 2017 The microbial degradation of petroleum hydrocarbons at low temperatures was investigated in subarctic deep-sea sediments in the Faroe  Hydrocarbon-degrading microorganisms usually exist in very low abundance in marine environments. Pollution by petroleum hydrocarbons, however, may  Petroleum which is the major source of energy for industry and daily life is an extremely complex mixture of hydrocarbons. From the hundreds of individual  of hydrocarbons degradation, microbial succession, and,  Residual hydrocarbon fraction in B. casei degraded heavy crude oil sample without aeration. 82. 7.8. Oil sludge degradation profiles of isolated microorganisms  Microbial degradation of petroleum hydrocarbons is one of the major practices in the natural decontamination process. We tested the effectiveness of some 

Progressive degradation of crude oil tends to remove saturated hydrocarbons first, concentrating heavy polar and asphaltene components in the residual oil. This leads to decreasing oil quality by lowering API gravity while increasing viscosity, sulfur, and metal content.

Progressive degradation of crude oil tends to remove saturated hydrocarbons first, concentrating heavy polar and asphaltene components in the residual oil. This leads to decreasing oil quality by lowering API gravity while increasing viscosity, sulfur, and metal content. The dominance of anaerobic hydrocarbon degradation, including methanogenesis, in subsurface biodegradation of oil is supported by the lack of sufficiently oxygenated formation waters to oxidize subsurface petroleum, the presence of anaerobic microorganisms in formation waters, the demonstration of anaerobic hydrocarbon degradation in laboratories

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