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Growth kinetic Analysis of Biosurfactant Producing Bacteria for Oil Reservoir Enhance Oil Recovery

Maghsoudi, Ehsan | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39161 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Roosta Azad, Reza; Yaghmaei, Soheyla
  7. Abstract:
  8. Evidently, environment contamination by water insoluble chemicals present at the industrial wastes could bring about catastrophic consequences to the biosphere. Biological based cleaning technologies are commonly considered as a practical remedy to remove these contaminations. In fact, these techniques are founded on the ability of certain microorganisms to degrade the contaminants. It is crystal clear that the availability of contaminants to the microorganisms is an essential parameter determining the final efficiency of the biodegradation process. In practice, the limited solubility of the contaminants in the aqueous phase leads to mass transfer constraints which consequently, decrease the digestion rate dramatically. The porous structure of the natural media such as the soil makes the problem more severe. Fortunately, a large number of the hydrocarbon assimilating microorganisms have been gained the capability of producing biosurfactants / bioemulsifiers to be adjusted to this situation. It is reported that the production of these agents could be either growth associated or independent to growth and some times, the amount of the secreted biosurfactant would not be enough to supply the cells with sufficient insoluble carbon source. Considering the direct relation between contamination biodegradation and microorganisms growth rate, the dynamics of microbial population should be studied in detail. Consequently, an appropriate growth kinetic model should be developed to cover the effects of the mentioned limitations adequately. In the present work, the power law logistic model of growth is applied to describe the growth kinetic of hydrocarbon assimilating bacteria in detail
  9. Keywords:
  10. Growth Kinetics ; Biosurfactant ; Microbial Enhanced Oil Recovery (MEOR) ; Lipopeptide ; Modified Logistic Model

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