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Biodegradation

Title:		Removal of the sesquiterpene beta-caryophyllene from air via biofiltration: performance assessment and microbial community structure
Author(s):		Moe WM; Hu W; Key TA; Bowman KS;
Address:		"Department of Civil and Environmental Engineering, Louisiana State University, 3515B Patrick Taylor Hall, Baton Rouge, LA, 70803, USA. moemwil@lsu.edu"
Journal Title:		Biodegradation
Year:		2013
Volume:		20121225
Issue:		5
Page Number:		685 - 698
DOI:		10.1007/s10532-012-9616-z
ISSN/ISBN:		1572-9729 (Electronic) 0923-9820 (Linking)
Abstract:		"Experiments were conducted in a laboratory-scale biofilter to assess the ability of a fixed-film biological process to treat an air stream containing beta-caryophyllene, a sesquiterpene emitted by a variety of conifer trees as well as industrial wood processing operations. Treatment performance was evaluated under a variety of pollutant loading conditions and nutrient supply rates over an operational period lasting more than 240 days. At empty bed contact times (EBCTs) as low as 10 s and daily average pollutant loading rate as high as 24.2 g C/(m(3) h) (grams pollutant measured as carbon per cubic meter packed bed volume per hour), removal efficiencies in excess of 95 % were observed when sufficient nutrients were supplied. Results demonstrate that, as with biofilters treating other compounds, biofilters treating beta-caryophyllene can experience local nutrient limitations that result in diminished performance. The biofilter successfully recovered high removal efficiency within a few days after resumption of pollutant loading following a 14-day interval of no contaminant loading. Construction of a 16S rRNA gene library via pyrosequencing revealed the presence of a high proportion of bacteria clustering within the genera Gordonia (39.7 % of the library) and Rhodanobacter (37.6 %). Other phylotypes detected at lower relative abundances included Pandoraea (6.2 %), unclassified Acetobacteraceae (5.5 %), Dyella (3.3 %), unclassified Xanthomonadaceae (2.6 %), Mycobacterium (1.8 %), and Nocardia (0.6 %). Collectively, results demonstrate that beta-caryophyllene can be effectively removed from contaminated gas streams using biofilters"
Keywords:		"Air Pollutants/*isolation & purification Bacteria/genetics/metabolism Base Sequence Biodegradation, Environmental Filtration/instrumentation/*methods *Microbial Consortia Polycyclic Sesquiterpenes RNA, Ribosomal, 16S/genetics Sesquiterpenes/*isolation & p;"
Notes:		"MedlineMoe, William M Hu, Weili Key, Trent A Bowman, Kimberly S eng Research Support, Non-U.S. Gov't Netherlands 2012/12/26 Biodegradation. 2013 Sep; 24(5):685-98. doi: 10.1007/s10532-012-9616-z. Epub 2012 Dec 25"