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Bioprocess Biosyst Eng

Title:		Intermittent trickling bed filter for the removal of methyl ethyl ketone and methyl isobutyl ketone
Author(s):		Farnazo DM; Nisola GM; Han M; Yoo N; Chung WJ;
Address:		"Energy and Environment Fusion Technology Center (E2FTC), Department of Environmental and Biotechnology, Myongji University, Namdong, Cheoin-gu, Gyeonggi-do, Republic of Korea"
Journal Title:		Bioprocess Biosyst Eng
Year:		2012
Volume:		20110930
Issue:		4
Page Number:		579 - 590
DOI:		10.1007/s00449-011-0631-y
ISSN/ISBN:		1615-7605 (Electronic) 1615-7591 (Linking)
Abstract:		"Biodegradations of methyl ethyl ketone and methyl isobutyl ketone were performed in intermittent biotrickling filter beds (ITBF) operated at two different trickling periods: 12 h/day (ITBF-12) and 30 min/day (ITBF-0.5). Ralstonia sp. MG1 was able to degrade both ketones as evidenced by growth kinetic experiments. Results show that trickling period is an important parameter to achieve high removal performance and to maintain the robustness of Ralstonia sp. MG1. Overall, ITBF-12 outperformed ITBF-0.5 regardless of the target compound. ITBF-12 had high performance recovery at various inlet gas concentrations. The higher carbon dioxide production rates in ITBF-12 suggest higher microbial activity than in ITBF-0.5. Additionally, lower concentrations of absorbed volatile organic compound (VOC) in trickling solutions of ITBF-12 systems also indicate VOC removal through biodegradation. Pressure drop levels in ITBF-12 were relatively higher than in ITBF-0.5 systems, which can be attributed to the decrease in packed bed porosity as Ralstonia sp. MG1 grew well in ITBF-12. Nonetheless, the obtained pressure drop levels did not have any adverse effect on the performance of ITBF-12. Biokinetic constants were also obtained which indicated that ITBF-12 performed better than ITBF-0.5 and other conventional biotrickling filter systems"
Keywords:		"Biodegradation, Environmental Bioreactors/*microbiology Butanones/*isolation & purification/*metabolism Filtration/*methods Methyl n-Butyl Ketone/*isolation & purification/*metabolism Ralstonia/*metabolism;"
Notes:		"MedlineFarnazo, Danvir Mark C Nisola, Grace M Han, Mideok Yoo, Namjong Chung, Wook-Jin eng Research Support, Non-U.S. Gov't Germany 2011/10/01 Bioprocess Biosyst Eng. 2012 May; 35(4):579-90. doi: 10.1007/s00449-011-0631-y. Epub 2011 Sep 30"