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Environ Technol

Title:		Effect of operating temperature on styrene mass transfer characteristics in a biotrickling filter
Author(s):		Parnian P; Zamir SM; Shojaosadati SA;
Address:		"a Biotechnology Group, Faculty of Chemical Engineering , Tarbiat Modares University , Tehran , Iran"
Journal Title:		Environ Technol
Year:		2017
Volume:		20160913
Issue:		10
Page Number:		1324 - 1332
DOI:		10.1080/09593330.2016.1226960
ISSN/ISBN:		1479-487X (Electronic) 0959-3330 (Linking)
Abstract:		"To study the effect of operating temperature on styrene mass transfer from gas to liquid phase in biotrickling filters (BTFs), overall mass transfer coefficient (K(L) a) was calculated through fitting test data to a general mass balance model under abiotic conditions. Styrene was used as the volatile organic compound and the BTF was packed with a mixture of pall rings and pumice. Operating temperature was set at 30 degrees C and 50 degrees C for mesophilic and thermophilic conditions, respectively. K(L) a values increased from 54 to 70 h(-1) at 30 degrees C and from 60 to 90 h(-1) at 50 degrees C, respectively, depending on the countercurrent gas to liquid flow ratio that varied in the range of 7.5-32. Evaluation of styrene mass transfer capacity (MTC) showed that liquid-phase mass transfer resistance decreased as the flow ratio increased at constant temperature. MTC also decreased with an increase in operating temperature. Both gas-liquid partition coefficient and K(L) a increased with increasing temperature; however the effect on gas-liquid partition coefficient was more significant and served to increase mass transfer limitations. Thermophilic biofiltration on the one hand increases mass transfer limitations, but on the other hand may enhance the biodegradation rate in favor of enhancing BTFs' performance"
Keywords:		"Air Pollutants/*metabolism Biodegradation, Environmental *Bioreactors Styrene/*metabolism Temperature Biofiltration flow ratio mass balance model mass transfer coefficient styrene;"
Notes:		"MedlineParnian, Parham Zamir, Seyed Morteza Shojaosadati, Seyed Abbas eng England 2016/09/03 Environ Technol. 2017 May; 38(10):1324-1332. doi: 10.1080/09593330.2016.1226960. Epub 2016 Sep 13"