Colonization of aerobic biofilms by sulfate-reducing bacteria.
Détails
ID Serval
serval:BIB_CA0E0D0BB118
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Colonization of aerobic biofilms by sulfate-reducing bacteria.
Périodique
Biofouling
ISSN
0892-7014
Statut éditorial
Publié
Date de publication
2001
Volume
17
Numéro
4
Pages
275-288
Langue
anglais
Résumé
The ability of the SRB Desulfovibrio desulfuricans to colonize aerobic heterotrophic or nitrifying biofilms on stainless steel surfaces was investigated by fluorescence in situ hybridization (FISH) in combination with confocal laser scanning microscopy (CLSM), the polymerase chain reaction (PCR) directed to the dissimilatory sulfite reductase and by oxygen microelectrodes. Biofilms of heterotrophic bacteria and of nitrifying bacteria pregrown on steel coupons in laboratory devices were not invaded by cells of D. desulfuricans within I week, even though large pores as possible entry paths and anoxic zones and sulfate in the medium as prerequisites for activity of D. desulfuricans existed in the biofilms. On the contrary, coinoculation of D. desulfuricans and aerobic heterotrophic bacteria from water of a cooling water system led to immediate establishment of a small but detectable population of D. desulfuricans distributed over the whole biofilm depth. The fact that individual SRB attached efficiently and irreversibly to steel suggests that in coinoculation experiments, establishment of SRB in the biofilm possibly occurred from the biofilm base, which is the zone that became anoxic first. Based on these findings it is suggested that the idea of protecting surfaces from SRB-induced corrosion by pregrowing and maintaining specific bacterial biofilms should be further pursued.
Mots-clé
sulfate-reducing bacteria, corrosion, biofilm, colonization, stainless steel
Web of science
Création de la notice
21/01/2008 14:36
Dernière modification de la notice
20/08/2019 16:45