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  • Title: Enrichment of AOB and NOB Population by Applying a BABE Reactor in an Activated Sludge Pilot Plant.
    Author: Gatti MN, Giménez JB, Carretero L, Ruano MV, Borrás L, Serralta J, Seco A.
    Journal: Water Environ Res; 2015 Apr; 87(4):369-77. PubMed ID: 26462081.
    Abstract:
    This paper deals with the effect of a bioaugmentation batch enhanced (BABE) reactor implementation in a biological nutrient removal pilot plant on the populations of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB). The results of fluorescence in situ hybridization (FISH) technique showed that AOB and NOB populations were significantly enhanced, from 4 to 8% and from 2 to 9%, respectively, as a result of the BABE reactor implementation. Regarding AOB, the percentage of Nitrosomonas oligotropha was mainly increased (3 to 6%). Regarding NOB, Nitrospirae spp was greatly enhanced (1 to 7%). Both species are considered K-strategist (high affinity to the substrate, low maximum growth rates) and they usually predominate in reactors with low ammonium and nitrite concentrations, respectively.
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