Experimental investigation on asphaltene biodegradability using microorganism: cell surface properties’ approach
| Autor: | Shahab Ayatollahi, Shohreh Iraji |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Microorganism
Hydrophobicity 02 engineering and technology 01 natural sciences lcsh:Petrology 020401 chemical engineering Pulmonary surfactant 0103 physical sciences 0204 chemical engineering lcsh:Petroleum refining. Petroleum products Asphaltene chemistry.chemical_classification 010304 chemical physics lcsh:QE420-499 Biodegradation Geotechnical Engineering and Engineering Geology Solvent General Energy Hydrocarbon Chemical engineering chemistry lcsh:TP690-692.5 Degradation (geology) Industrial and production engineering |
| Zdroj: | Journal of Petroleum Exploration and Production Technology, Vol 9, Iss 2, Pp 1413-1422 (2018) |
| ISSN: | 2190-0566 2190-0558 |
| DOI: | 10.1007/s13202-018-0537-1 |
| Popis: | Asphaltene precipitation is known to be responsible for serious challenges in oil industry such as wellbore damage, oil flow reduction, and plugging of transportation lines. The traditional methods to remove asphaltene deposition are mostly based on chemical solvent. One of the recent proposed green and cost–effect remedial methods is the application of microorganisms capable of consuming the heavy hydrocarbon chains. The cell surface hydrophobicity among others effectively manipulates the efficiency of the microorganism for asphaltene degradation. Besides, surface active agents would affect the microorganism adhesion and cell surface properties, and alters its hydrophobicity. Investigating the effect of these parameters on biodegradability of asphaltene leads to a better understanding of the microorganism effects on asphaltenic oil. In the current investigation, different asphaltenic solutions with the concentration of 2, 4, and 10 g/l are prepared using different southern Iranian crude oil sources, namely Ahwaz-Bangestan and Kuh-e-Mond oil fields. To estimate asphaltene biodegradability, the solutions were used as a carbon source for three different microorganisms namely Enterobacter cloacae, Enterobacter cloacae, and Pseudomonas aeruginosa for a period of 10 days, while the temperature and rotational speed were kept constant under 40 °C and 150 rpm, respectively. The tests were also repeated using sodium dodecyl benzene sulfonate as surface active agent to evaluate the effect of surfactant on microorganism adhesion and cell surface hydrophobicity. The results pointed to the direct effects of the initial concentration of asphaltene in the solution as well as the presence of surfactant which alters the cells hydrophobicity and leads to more asphaltene biodegradability up to 49%. |
| Databáze: | OpenAIRE |
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