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Please use this identifier to cite or link to this item: http://uvadoc.uva.es/handle/10324/23556
Title: Microbial community changes during different empty bed residence times and operational fluctuations in an air diffusion reactor for odor abatement
Authors: Rodríguez Rodríguez, Elisa
García Encina, Pedro A.
Muñoz Torre, Raúl
Lebrero Fernández, Raquel
Issue Date: 2017
Publisher: Elsevier
Description: Producción Científica
Citation: Science of The Total Environment, 2017, Vol. 590–591, Pages 352–360
Abstract: The succession of bacterial and fungal populations was assessed in an activated sludge (AS) diffusion bioreactor treating a synthetic malodorous emission containing H2S, toluene, butanone and alpha-pinene. Microbial community characteristics (bacterial and fungal diversity, richness, evenness and composition) and bioreactor function relationships were evaluated at different empty bed residence times (EBRTs) and after process fluctuations and operational failures (robustness test). For H2S, butanone and toluene, the bioreactor showed a stable and efficient abatement performance regardless of the EBRT and fluctuations applied, while low alpha-pinene removals were observed. While no clear positive or negative relationship between community characteristics and bioreactor functions was observed, ecological parameters such as evenness and community dynamics seemed to be of importance for maintaining reactor stability. The optimal degree of evenness of the inoculum likely contributed to the high robustness of the system towards the fluctuations imposed. Actinobacteria, Proteobacteria and Fungi (Hypocreales, Chaeatothyriales) were the most abundant groups retrieved from the AS system with a putative key role in the degradation of butanone and toluene. Typical H2S and alpha-pinene degraders were not retrieved from the system. The inoculation of P. fluorescens, a known alpha-pinene degrader, to the system did not result in the enhancement of the degradation of this compound. This strain was likely outcompeted by the microorganisms already adapted to the AS environment.
Peer Review: SI
DOI: 10.1016/j.scitotenv.2017.01.161
Sponsor: Ministerio de Economía, Industria y Competitividad (CTQ2007-64324, 18ISMW)
Junta de Castilla y Leon (UIC 476 71)
Publisher Version: http://www.sciencedirect.com/science/article/pii/S004896971730178X
Language: eng
URI: http://uvadoc.uva.es/handle/10324/23556
Rights: info:eu-repo/semantics/embargoedAccess
Appears in Collections:GTA - Artículos de revista
DEP48 - Artículos de revista

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