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Bioresour Technol

Title:		Resistance and resilience of removal efficiency and bacterial community structure of gas biofilters exposed to repeated shock loads
Author(s):		Cabrol L; Malhautier L; Poly F; Roux XL; Lepeuple AS; Fanlo JL;
Address:		"Laboratoire Genie de l'Environnement Industriel, Ecole des Mines d'Ales, Rue Jules Renard, 30100 Ales, France. lea.cabrol@gmail.com"
Journal Title:		Bioresour Technol
Year:		2012
Volume:		20120720
Issue:
Page Number:		548 - 557
DOI:		10.1016/j.biortech.2012.07.033
ISSN/ISBN:		1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:		"Since full-scale biofilters are often operated under fluctuating conditions, it is critical to understand their response to transient states. Four pilot-scale biofilters treating a composting gas mixture and undergoing repeated substrate pulses of increasing intensity were studied. A systematic approach was proposed to quantify the resistance and resilience capacity of their removal efficiency, which enabled to distinguish between recalcitrant (ammonia, DMDS, ketones) and easily degradable (esters and aldehyde) compounds. The threshold of disturbing shock intensity and the influence of disturbance history depended on the contaminant considered. The spatial and temporal distribution of the bacterial community structure in response to the perturbation regime was analysed by Denaturing Gradient Gel Electrophoresis (DGGE). Even if the substrate-pulses acted as a driving force for some community characteristics (community stratification), the structure-function relationships were trickier to evidence: the distributions of resistance and composition were only partially coupled, with contradictory results depending on the contaminant considered"
Keywords:		"Ammonia/analysis Bacteria/*growth & development/*metabolism Biodegradation, Environmental *Biodiversity Biomass Bioreactors/*microbiology DNA, Bacterial/metabolism Denaturing Gradient Gel Electrophoresis Filtration/*instrumentation Gases/*isolation & puri;"
Notes:		"MedlineCabrol, Lea Malhautier, Luc Poly, Franck Roux, Xavier Le Lepeuple, Anne-Sophie Fanlo, Jean-Louis eng Research Support, Non-U.S. Gov't England 2012/09/05 Bioresour Technol. 2012 Nov; 123:548-57. doi: 10.1016/j.biortech.2012.07.033. Epub 2012 Jul 20"