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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 10, No. 4, 2013, pp. 837-846
Bioline Code: st13082
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 10, No. 4, 2013, pp. 837-846

 en Anoxygenic phototrophic bacterial diversity within wastewater stabilization plant during ‘red water’ phenomenon
Belila, A.; Fazaa, I.; Hassen, A. & Ghrabi, A.

Abstract

The molecular diversity of the purple photosynthetic bacteria was assessed during temporal pigmentation changes in four interconnected wastewater stabilization ponds treating domestic wastewater by denaturant gel gradient electrophoresis method applying pufM gene. Results revealed high phylogenetic diversity of the purple phototrophic anoxygenic bacteria community characterized by the presence of the purple non-sulfur, purple sulfur, and purple aerobic photosynthetic anoxygenic bacteria. This phototrophic bacterial assemblage was dominated by the purple non-sulfur bacteria group (59.3 %) with six different genera followed by the purple sulfur community (27.8 %) with four genera and finally 12.9 % of the pufM gene sequences were assigned throughout the aerobic anoxygenic phototrophic bacterial group. The purple phototrophic bacterial community was characterized by the presence of salt-dependant bacterial species belonging to the genus Marichromatium check for this species in other resources , Thiorhodococcus check for this species in other resources , Erythrobacter check for this species in other resources , and Roseobacter check for this species in other resources . The wastewater treatment plant performances were unsatisfactory, and the biological and chemical parameters suggested that the purple photosynthetic bloom was correlated with the eutrophic state.

Keywords
Functional diversity; Eutrophic state; Domestic wastewater; Denaturant gel gradient electrophoresis; pufM gene

 
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