Bioremediation of Mixed Wastes (BTEX, TPH, TCE, and cis-DCE) Contaminated Water
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 15, Issue 3
Abstract
Together with industrialization, more sites have become contaminated with mixed wastes of organics. Contamination of groundwater with benzene, toluene, ethylbenzene, and three isomers of xylene (BTEX) and chlorinated aliphatic hydrocarbons (CAHs) allows for the application of aerobic bioremediation to achieve mineralization of both types of compounds. In this study, the aerobic bioremoval of mixtures of these compounds [BTEX, BTEX/trichloroethylene (TCE), BTEX/cis-1,1-dichloroethylene (cis-DCE), BTEX/total petroleum hydrocarbons (TPH)/TCE, and toluene and ortho-xylene (ToX/TCE] was assessed under different environmental conditions (pH and temperature) by using indigenous microorganisms isolated from potentially contaminated regional sites. The highest TPH bioremoval efficiencies () occurred at 25°C and under neutral or alkaline conditions. TCE was cometabolized with toluene and -xylene provided as growth substrates, and the highest bioremoval efficiency occurred at , and pH and temperature impacted the mineralization of compounds. This study would help enhance the applicability of bioremediation technology to the mixed-wastes contaminated sites.
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Acknowledgments
This work was financially supported by the University of Macau Research Committee and the Macau Science and Technology Development Fund.
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Published In
Journal of Hazardous, Toxic, and Radioactive Waste
Volume 15 • Issue 3 • July 2011
Pages: 160 - 165
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jan 20, 2010
Accepted: Oct 5, 2010
Published online: Nov 8, 2010
Published in print: Jul 1, 2011
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