RT info:eu-repo/semantics/article
T1 Microbial community changes during different empty bed residence times and operational fluctuations in an air diffusion reactor for odor abatement
A1 Rodríguez Rodríguez, Elisa
A1 García Encina, Pedro Antonio
A1 Muñoz Torre, Raúl
A1 Lebrero Fernández, Raquel
AB 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.
PB Elsevier
YR 2017
FD 2017
LK http://uvadoc.uva.es/handle/10324/23556
UL http://uvadoc.uva.es/handle/10324/23556
LA eng
NO Science of The Total Environment, 2017, Vol. 590–591, Pages 352–360
NO Producción Científica
DS UVaDOC
RD 01-may-2024