Comparison of the biodegradability of crude and fuel oils

1976 ◽  
Vol 22 (4) ◽  
pp. 598-602 ◽  
Author(s):  
J. D. Walker ◽  
L. Petrakis ◽  
R. R. Colwell
Keyword(s):  
Crude Oil ◽  
Microbial Degradation ◽  
Mixed Population ◽  
Fuel Oil ◽  
Fuel Oils ◽  
Generic Composition ◽  
Low Sulfur ◽  
South Louisiana

Crude and fuel oils were compared for ability to support growth of a mixed population of estuarine bacteria. A total of four oils, two crude and two fuel oils, were examined. It was found that each of the oils supported a unique population of bacteria and yeasts, with respect to generic composition. Low-sulfur, high-saturate, South Louisiana crude oil was found to be highly susceptible to degradation. In contrast, the dense, high-sulfur, high-aromatic, Bunker C fuel oil was strongly refractory to microbial degradation.

scholarly journals COMPARATIVE EVALUATION OF PHYSICAL PROPERTIES OF SOME YEMENI CRUDE AND FUEL OIL

2020 ◽  
Vol 1 (4) ◽  
Author(s):  
Rokhsana Mohammed Ismail ◽  
Fatima Sahleh Nagi
Keyword(s):  
Crude Oil ◽  
Sulfur Content ◽  
Modern Society ◽  
Fuel Oil ◽  
Raw Material ◽  
Published Data ◽  
Two Samples ◽  
Fuel Oils ◽  
Oil Blend ◽  
Low Sulfur

Due to the high significance of crude oil to modern society as a source of energy and as raw material for a wide chemical and petrochemical industries; in this study, we evaluate the characteristics of certain Yemeni crude, and fuel oils specifically Mareb crude oil blend, Masila crude oil blend plus two samples from Sounah and Hijah oil fields in Masila basin. The general specifications of these crudes and fuel oils are determined and compared with some other regional and international types including Brent and West Texas benchmark crudes using the published data in the specialized literature. It is revealed that Mareb crude oil blend is the lightest and sweetest crude oil followed by Sounah crude while Masila is considered Medium crude and Hijah field is the heaviest with medium sulfur content. Mareb, Masila blends, and Sounah field fuel oils are considered low sulfur fuel oils with sulfur content below the 1% standard marketable fuels; while the Hijah fuel oil slightly above, and this is absorbed within the marketable blend.

scholarly journals Comparative Evaluation of Metals and Heavy Metals in Some Yemeni Crude and Fuel Oil

2020 ◽  
Vol 8 (6) ◽  
Author(s):  
Rokhsana M. Ismail ◽  
Fatima Sahleh Nagi
Keyword(s):  
Heavy Metals ◽  
Crude Oil ◽  
Modern Society ◽  
Oil Fields ◽  
Fuel Oil ◽  
Raw Material ◽  
Crude Oils ◽  
Two Samples ◽  
Fuel Oils ◽  
Oil Blend

Due to high importance of the crude oil to the modern society as a source of energy and as raw material for a wide chemical and petro chemical industries. In this study we made assessment of metals and heavy metals  in some Yemeni crude, and fuel oils namely Mareb crude oil blend, Masila crude oil blend plus two samples from Sounah and Hijah oil fields in Masila basin. Fifteen  metals and heavy metals were determined in above samples, but the most indicated were ( Na, K, Mg, ) and ( V, Co, Ni ) using ICP technique and atomic absorption spectroscopy . The order of concentration of metals in Yemeni crude oils were as shown in figures: Na < K < Co < Mg < V < Ni < Ca< Fe < Cd < Al< Zn < Cr < Cu < Pb < Mn. In Fuel oil: Na < Co < V < Mg < K < Ni < Ca < Fe < Al < Cd < Zn < Cr< Pb < Mn < Cu. Comparing concentrations of metals in studied sample, in general were less than in crude oil and fuel oil in many countries. That mean Yemeni crude and fuel oil are the best in quality. The order of concentration of metals in Yemeni crude oils were as shown in figures: Na < K < Co < Mg < V < Ni < Ca< Fe < Cd < Al< Zn < Cr < Cu < Pb < Mn. In Fuel oil: Na < Co < V < Mg < K < Ni < Ca < Fe < Al < Cd < Zn < Cr< Pb < Mn < Cu. Comparing concentrations of metals in studied sample, in general were less than in crude oil and fuel oil in many countries. That mean Yemeni crude and fuel oil are the best in quality.  

Microbial degradation of resins fractionated from Arabian light crude oil

1995 ◽  
Vol 41 (4-5) ◽  
pp. 418-424 ◽  
Author(s):  
Kasthuri Venkateswaran ◽  
Toshihiro Hoaki ◽  
Misako Kato ◽  
Tadashi Maruyama
Keyword(s):  
Crude Oil ◽  
Microbial Degradation ◽  
Sole Source ◽  
Mixed Population ◽  
Pseudomonas Sp ◽  
Sediment Samples ◽  
First Report ◽  
Light Crude Oil ◽  
Oil Biodegradation

Sediment samples from Japanese coasts were screened for microorganisms able to degrade resin components of crude oil, and a mixed population that could degrade 35% of 5000 ppm resin in 15 days was obtained. This population also metabolized 50% of saturates and aromatics present in crude oil (5000 ppm) in 7 days. A Pseudomonas sp. isolated from the mixed population emulsified and degraded 30% of resins. This strain also degraded saturates and aromatics (30%) present in crude oil (5000 ppm). This is the first report describing organisms that are able to grow on the resin fraction of crude oil as a sole source of carbon and energy.Key words: resin, crude oil, biodegradation, Iatroscan.

scholarly journals Characterization of possible alternative materials for the production of marine fuels

Paliva ◽  
2021 ◽  
pp. 16-23
Author(s):  
Dominik Schlehöfer ◽  
Aleš Vráblík ◽  
Rarek Černý
Keyword(s):  
Raw Materials ◽  
Quality Parameters ◽  
Fuel Oil ◽  
Marine Fuel ◽  
Quality Properties ◽  
Alternative Materials ◽  
Fuel Oils ◽  
Sulfur Level ◽  
The Individual ◽  
Low Sulfur

Maritime transport is a significant contributor to the environmental pollution. For this reason, the maximum sulfur content in liquid marine fuels has been drastically reduced since January 1st 2020 for deep sea areas. This reduction can be solved by diluting the conventional high sulfur fuels with suitable low sulfur components. However, mixing two or more components with each other carries a potential risk of incompatibility or instability of the final product, especially in the case of longer storage and subsequent transportation to the end consumers. For the above reasons, this work deals with the mapping of alternative raw materials that could be used to produce very low sulfur fuel oils (VLSFO) with a sulfur level up to 0.5 wt%. A total of 5 raw materials (1 conventional fuel oil – HSFO and 4 alternative raw materials) were characterized. The individual raw materials were compared to each other with regard to the quality properties required for marine fuels according to the ISO 8217. Subsequently, the suitability of these raw materials for further mixing was outlined in order to meet the required quality parameters for marine fuel mixing.

scholarly journals Characterization of possible alternative materials for the production of marine fuels

Paliva ◽  
2021 ◽  
pp. 16-23
Author(s):  
Dominik Schlehöfer ◽  
Aleš Vráblík ◽  
Radek Černý
Keyword(s):  
Raw Materials ◽  
Quality Parameters ◽  
Fuel Oil ◽  
Marine Fuel ◽  
Quality Properties ◽  
Alternative Materials ◽  
Fuel Oils ◽  
Sulfur Level ◽  
The Individual ◽  
Low Sulfur

Maritime transport is a significant contributor to the environmental pollution. For this reason, the maximum sulfur content in liquid marine fuels has been drastically reduced since January 1st 2020 for deep sea areas. This reduction can be solved by diluting the conventional high sulfur fuels with suitable low sulfur components. However, mixing two or more components with each other carries a potential risk of incompatibility or instability of the final product, especially in the case of longer storage and subsequent transportation to the end consumers. For the above reasons, this work deals with the mapping of alternative raw materials that could be used to produce very low sulfur fuel oils (VLSFO) with a sulfur level up to 0.5 wt%. A total of 5 raw materials (1 conventional fuel oil – HSFO and 4 alternative raw materials) were characterized. The individual raw materials were compared to each other with regard to the quality properties required for marine fuels according to the ISO 8217. Subsequently, the suitability of these raw materials for further mixing was outlined in order to meet the required quality parameters for marine fuel mixing.

Biodegradation rates of components of petroleum

1976 ◽  
Vol 22 (8) ◽  
pp. 1209-1213 ◽  
Author(s):  
J. D. Walker ◽  
R. R. Colwell ◽  
L. Petrakis
Keyword(s):  
Mass Spectrometry ◽  
Crude Oil ◽  
Computer Analysis ◽  
Microbial Degradation ◽  
Dynamic Process ◽  
Logarithmic Phase ◽  
Total Residue ◽  
Microbial Biodegradation ◽  
Maximum Decrease ◽  
South Louisiana

Rates of microbial biodegradation of components of South Louisiana crude oil were determined by computer analysis of data obtained from computerized mass spectrometry. Total residue of the oil decreased exponentially with time, with maximum decrease noted at logarithmic phase, whereas asphaltenes and resins increased at the logarithmic phase of growth. Saturates decreased continuously during growth. Microbial degradation of components of crude oil was concluded to be a dynamic process.

Long-chain n-alkanes occurring during microbial degradation of petroleum

1976 ◽  
Vol 22 (6) ◽  
pp. 886-891 ◽  
Author(s):  
J. D. Walker ◽  
R. R. Colwell
Keyword(s):  
Crude Oil ◽  
Mixed Culture ◽  
Microbial Degradation ◽  
Open Ocean ◽  
Crude Oils ◽  
Axenic Cultures ◽  
South Louisiana ◽  
Long Chain

Five axenic cultures and a mixed culture were examined for ability to degrade South Louisiana, Brass River Nigerian, Anaco Venezuelan, and Altamont crude oils. A wax was observed during microbial degradation of Altamont crude oil, but not during weathering of the oil. The high-boiling n-alkanes in the wax were associated with microbial degradation of the oil and appeared to be similar to components of tarballs found in the open ocean.

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