TY - GEN
T1 - Effect of temperature on biodegradation of crude oil
AU - Zekri, Abdulrazag Y.
AU - Chaalal, Omar
N1 - Funding Information:
Received May 15, 2001; accepted August 31, 2003. This article was written as part of a research grant provided by the Abu Dhabi National Oil Company (ADNOC). We thank Ibrahim El-Magrabi for performing the experimental work and performing the image analyzer tests. Address correspondence to A. Y. Zekri, UAE University, P.O. Box 17555, Al Ain, UAE. E-mail: [email protected]
PY - 2005/1
Y1 - 2005/1
N2 - An active strain of anaerobic thermophilic bacteria was isolated from the environment of the United Arab Emirates. This project studied the effect of temperature, salinity and oil concentration on biodegradation of crude oil. Oil weight loss, microbial growth and the changes of the crude oil asphaltene concentration are used to evaluate the oil degradation by this strain. A series of batch experiments was performed to study the effects of bacteria on the degradation of crude oil. The effects of oil concentration, bacteria concentration, temperature and salinity on the biodegradation were investigated. The temperatures of the studied systems were varied between 35 and 75°C and the salt concentrations were varied between 0 and 10%. Oil concentrations were ranged from 5 to 50% by volume. Experimental work showed the bacteria employed in this project were capable of surviving the harsh environment and degrading the crude oil at various conditions. Increasing the temperature increases the rate of oil degradation by bacteria. Increasing the oil concentration in general decreases the rate of bacteria oil degradation. Salinity plays a major role on the acceleration of biodegradation process of crude oil. An optimum salinity should be determined for every studied system. The finding of this project could be used in either the treatment of oil spill or in-situ stimulation of heavy oil wells.
AB - An active strain of anaerobic thermophilic bacteria was isolated from the environment of the United Arab Emirates. This project studied the effect of temperature, salinity and oil concentration on biodegradation of crude oil. Oil weight loss, microbial growth and the changes of the crude oil asphaltene concentration are used to evaluate the oil degradation by this strain. A series of batch experiments was performed to study the effects of bacteria on the degradation of crude oil. The effects of oil concentration, bacteria concentration, temperature and salinity on the biodegradation were investigated. The temperatures of the studied systems were varied between 35 and 75°C and the salt concentrations were varied between 0 and 10%. Oil concentrations were ranged from 5 to 50% by volume. Experimental work showed the bacteria employed in this project were capable of surviving the harsh environment and degrading the crude oil at various conditions. Increasing the temperature increases the rate of oil degradation by bacteria. Increasing the oil concentration in general decreases the rate of bacteria oil degradation. Salinity plays a major role on the acceleration of biodegradation process of crude oil. An optimum salinity should be determined for every studied system. The finding of this project could be used in either the treatment of oil spill or in-situ stimulation of heavy oil wells.
KW - Asphaltene
KW - Biodegradation
KW - Thermophilic bacteria
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U2 - 10.1080/00908310490448299
DO - 10.1080/00908310490448299
M3 - Article
AN - SCOPUS:11844250544
SN - 0090-8312
VL - 27
SP - 233
EP - 244
JO - Energy Sources
JF - Energy Sources
ER -