Comparison of Liquid-Liquid Extraction System and Extraction-Evaporation System for High Concentrations of Phenolic Wastewater
Publication: Journal of Environmental Engineering
Volume 133, Issue 2
Abstract
Liquid-liquid extraction system (LLES), including extraction section and reverse extraction section, had been applied successfully in the treatment of phenolic wastewater. In this paper, a novel pilot scale system, the extraction-evaporation system (EES) without reverse extraction section was introduced. The treatment capacity of both LLES and EES reached . According to experimental results and economical analysis, EES had higher removal efficiency and lower treatment cost than those of LLES in the treatment of the phenolic wastewater containing phenol, the concentrations of most resin and dye industrial effluents. The highest extractive efficiency of EES could reach 99.0% within the concentration range of phenol, and remnant phenol in wastewater varied from 43.6 to . The highest extracted efficiency in LLES arrived at 98.2% and the remaining phenol concentration reached . The average removal efficiency of EES increased 1%, and the treatment cost of EES decreased 4.6%. The pretreated wastewater by EES was able to meet the demands of biological or adsorptive process. Despite that the total investment cost of EES was higher than that of LLES, treatment cost of wastewater per ton by EES was lower than that of LLES.
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Acknowledgments
This research was supported by the Chinese Academy of Sciences, Ministry of Science and Technology, National Natural Science Foundation of China, and the University of Science and Technology of China.CASNNSFC
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 133 • Issue 2 • February 2007
Pages: 198 - 202
Copyright
© 2007 American Society of Civil Engineers.
History
Received: Aug 8, 2005
Accepted: May 10, 2006
Published online: Feb 1, 2007
Published in print: Feb 2007
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