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J Air Waste Manag Assoc

Title:		Effect of substrate Henry's constant on biofilter performance
Author(s):		Zhu X; Suidan MT; Pruden A; Yang C; Alonso C; Kim BJ; Kim BR;
Address:		"Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, USA"
Journal Title:		J Air Waste Manag Assoc
Year:		2004
Volume:		54
Issue:		4
Page Number:		409 - 418
DOI:		10.1080/10473289.2004.10470918
ISSN/ISBN:		1096-2247 (Print) 1096-2247 (Linking)
Abstract:		"Butanol, ether, toluene, and hexane, which have Henry's constants ranging from 0.0005 to 53, were used to investigate the effects of substrate solubility or availability on the removal of volatile organic compounds (VOCs) in trickle-bed biofilters. Results from this study suggest that, although removal of a VOC generally increases with a decrease in its Henry's constant, an optimal Henry's constant range for biofiltration may exist. For the treatment of VOCs with high Henry's constant values, such as hexane and toluene, the transfer of VOCs between the vapor and liquid phases or between the vapor phase and the biofilm is a rate-determining step. However, oxygen (O2) transfer may become a rate-limiting step in treating VOCs with low Henry's constants, such as butanol, especially at high organic loadings. The results demonstrated that in a gas-phase aerobic biofilter, nitrate can serve both as a growth-controlling nutrient and as an electron acceptor in a biofilm for the respiration of VOCs with low Henry's constants. Microbial communities within the biofilters were examined using denaturing gradient gel electrophoresis to provide a more complete picture of the effect of O2 limitation and denitrification on biofilter performance"
Keywords:		"Air Pollution/*prevention & control Biodegradation, Environmental Filtration *Models, Theoretical Organic Chemicals Oxidants, Photochemical/*isolation & purification Ozone/*isolation & purification Volatilization;"
Notes:		"MedlineZhu, Xueqing Suidan, Makram T Pruden, Amy Yang, Chunping Alonso, Cristina Kim, Byung J Kim, Byung R eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2004/04/30 J Air Waste Manag Assoc. 2004 Apr; 54(4):409-18. doi: 10.1080/10473289.2004.10470918"