Ethylbenzene removal under mesophilic conditions in a biofilter with Macadamia ternifolia nutshells as a carrier material

Journal of Chemical Technology and Biotechnology - Tập 88 Số 1 - Trang 81-87 - 2013
Diëgo Volckaert1, Francisco Javier Álvarez‐Hornos2, Philippe M. Heynderickx1, Chidnapa Kittikoon1, Herman Van Langenhove1
1Research Group EnVOC, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
2Research Group GI2AM, Department of Chemical Engineering, University of Valencia, Av. De la Universitat, Burjassot, Spain

Tóm tắt

AbstractBACKGROUNDBiofilters are suitable to treat industrial emissions polluted with volatile organic compounds (VOCs), responsible for photochemical smog and depletion of the ozone layer. This study analyzes the performance of a biofilter with Macadamia ternifolia nutshells as a carrier material treating air streams contaminated with ethylbenzene under mesophilic conditions with continuous feeding.RESULTSThe biofilter was operated continuously for 5 months applying several inlet loads (IL), empty bed residence times (EBRT) and temperatures. At a temperature of 303 ± 1 K removal efficiencies (RE) higher than 90% were obtained for ILs lower than 85.6 g m−3 h−1 and 70.6 g m−3 h−1 at an EBRT of 150 and 90 s. The yield coefficient resulted in 0.73 g of dry biomass formed per g of ethylbenzene degraded. Michaelis–Mentens half saturation parameter Km and maximum volumetric elimination rate rm were calculated for EBRT of 90 s, Km = 0.28 ± 0.09 g m−3 and rm = 89 ± 11 g m−3 h−1, and 150 s, Km = 0.72 ± 0.18 g m−3 and rm = 117 ± 15 g m−3 h−1.CONCLUSIONSThe experimental data shows that a biofilter with Macadamia ternifolia nutshells (waste material in Thailand) as a carrier material is a good option for air treatment in tropical areas with typical temperatures varying from 292 to 313 K, using ethylbenzene as a test substrate. Copyright © 2012 Society of Chemical Industry

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Journal of Chemical Technology and Biotechnology

Tập 88 Số 1

81-87

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