Biological treatment of VOCs: impact of the volumetric load on the selection of efficient microbial communities
- Autores: Luc Malhautier, Sandrine Bayle, Valérie Degrange, Jean Jacques Godon, Jean-Louis Fanlo
- Localización: Biotechniques for air pollution control: proceedings of the international congress Biotechniques for Air Pollution Control : A Coruña, Spain, October 5-7, 2005 / Christian Kennes (dir. congr.), María C. Veiga (dir. congr.), 2005, ISBN 84-9749-163-7, págs. 39-46
- Idioma: inglés
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Resumen
The aim of this work is to evaluate the impact of the applied volumetric load on the selection of an efficient microbial community able to degrade a complex mixture of VOCs. Two reactors were used and were supplied with a gaseous effluent containing eleven VOCs for which the concentration differs. The removal of three chemical groups is studied: oxygenated, aromatic and halogenated compounds. The functioning of the microflora has been monitored as a function of time: pollutants removal, bacterial density and diversity. The results showed that the applied volumetric load seems to have an impact on the functioning and the genetic structure of the bacterial community. A high volumetric load seems to induce a low efficient functioning in terms of elimination efficiency and chemical nature of removed compounds, and a simplification of the genetic structure of the total bacterial community with the apparition of a dominant microflora. A low volumetric load seems to favour a better functioning and allows a wealther bacterial diversity to be kept.
