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Environ Technol

Title:		Evaluation of o-xylene and other volatile organic compounds removal using a xylene-acclimated biotrickling filter
Author(s):		Wang XQ; Lu BH; Zhou XX; Li W;
Address:		"Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, Zhejiang University, Yuquan Campus, Hangzhou 310027, People's Republic of China. Institute of Environmental Engineering, Zhejiang University, Zijingang Campus, Hangzhou 310058, People's Republic of China"
Journal Title:		Environ Technol
Year:		2013
Volume:		34
Issue:		17-20
Page Number:		2691 - 2699
DOI:		10.1080/09593330.2013.786136
ISSN/ISBN:		0959-3330 (Print) 0959-3330 (Linking)
Abstract:		"In this study, performance evaluation for the gas-phase o-xylene removal using a xylene-acclimated biotrickling filter (BTF) was conducted. Substrate interactions during aerobic biodegradation of three poorly soluble compounds, both individually and in paired mixtures (namely, o-xylene and ethyl acetate, o-xylene and dichloromethane, which are common solvents used by pharmaceutical industry), were also investigated. Experimental results indicate that a maximum elimination capacity of 99.3 g x m(-3) x h(-1) (70% removal) was obtained at an o-xylene loading rate of 143.0 g x m(-3) x h(-1), while the top packing layer (one-third height of the three packing layers) only contributed about 13% to the total elimination capacity. Kinetic constants for o-xylene biodegradation and the pattern of o-xylene removal performance along the height of the BTF were obtained through the modified Michaelis-Menten kinetics and convection-diffusion reaction model, respectively. A reduction of removal efficiency in o-xylene (83.2-74.5% removal at a loading rate of 40.3 g x m(-3) x h(-1) for the total volatile organic compound (VOC) loading rate of 79 g x m(-3) x h(-1)) in the presence of ethyl acetate (100% removal) was observed, while enhanced o-xylene removal efficiency (71.6-78.6% removal at a loading rate of 45.1 g x m(-3) x h(-1) for the total VOC loading rate of 90 g x m(-3) x h(-1)) was achieved in the presence of dichloromethane (35.6% removal). This work shows that a BTF with xylene-acclimated microbial consortia has the ability to remove several poorly soluble compounds, which would advance the knowledge on the treatment of pharmaceutical VOC emissions"
Keywords:		"Biodegradation, Environmental Equipment Design Filtration/*instrumentation Microbial Consortia Volatile Organic Compounds/*isolation & purification/metabolism Xylenes/*isolation & purification/metabolism;"
Notes:		"MedlineWang, Xiang-Qian Lu, Bi-Hong Zhou, Xue-Xia Li, Wei eng Evaluation Study Research Support, Non-U.S. Gov't England 2014/02/18 Environ Technol. 2013 Sep-Oct; 34(17-20):2691-9. doi: 10.1080/09593330.2013.786136"