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Exposure to sulfide causes populations shifts in sulfate-reducing consortia
Date
2006-10-01
Author
İçgen, Bülent
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The shift in the community structure of a mixed culture of sulfate-reducing bacteria (SRB) at 0.5, 0.75, 1, and 1.5 kg m(-3) sulfide loadings was investigated in an anaerobic continuous bioreactor used for treatment of sulfate-containing wastewater by fluorescence in situ hybridization (FISH), using SRB species-specific and group-specific 16S rRNA-targeting probes. Hybridization analysis using these 16S rRNA-targeted oligonucleotide probes revealed that sulfide was toxic for Desulfonema, Desulfobulbus spp. and the Desulfobacteriaceae group, although it was not toxic for Desulfobacter, Desulfotomaculum, Desulfobacterium spp. or the Desulfovibrionaceae group. On the other hand, only a high concentration of sulfide of 1.5 kg m(-3) was found to be toxic for the Desulfococcus group in the bioreactor. When the sulfide in the feed was 1.00 kg m(-3) the sulfate-reducing capacity of the system decreased, and this decrease was more pronounced when the inlet sulfide was further increased to 1.5 kg m(-3).
Subject Keywords
Molecular Biology
,
Microbiology
,
General Medicine
URI
https://hdl.handle.net/11511/44035
Journal
Research in Microbiology
DOI
https://doi.org/10.1016/j.resmic.2006.04.004
Collections
Department of Environmental Engineering, Article
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The microbial population structure and function of a mixed culture of sulfate-reducing bacteria (SRB) maintained in anaerobic continuous bioreactors were tracked before and after a major perturbation, which involved the addition of sulfate to the influent of a bioreactor when operated at steady state at 35 degrees C, pH 7.8 and a 2.5 day residence time with feed stream containing 10 and 15 kg m(-3) sulfate as terminal electron acceptor and 19.6 and 29.4 kg m(-3) 4 ethanol as carbon source and electron donor...
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B. İçgen, “Exposure to sulfide causes populations shifts in sulfate-reducing consortia,”
Research in Microbiology
, pp. 784–791, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/44035.