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          Institute: MPI für marine Mikrobiologie     Collection: Abteilung Molekulare Ökologie     Display Documents

ID: 13571.0, MPI für marine Mikrobiologie / Abteilung Molekulare Ökologie
Simultaneous P and N removal in a sequencing batch biofilm reactor: insights from reactor- and microscale investigations
Authors:Gieseke, A.; Arnz, P.; Amann, R.; Schramm, A.
Date of Publication (YYYY-MM-DD):2002-01
Title of Journal:Water Research
Journal Abbrev.:Water Res.
Issue / Number:2
Start Page:501
End Page:509
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:A sequencing batch biofilm reactor (SBBR) with well established enhanced biological phosphate removal (EBPR) was subjected to higher ammonium concentrations to stimulate and eventually implement simultaneous nitrification. Changes of activity and populations were investigated by a combination of online monitoring, microsensor measurements and fluorescence in situ hybridisation (FISH) of biofilm sections. Nitrification and nitrifying bacteria were always restricted to the periodically oxic biofilm surface. Both, activity and population size increased significantly with higher ammonium concentrations. Nitrification always showed a delay after the onset of aeration, most likely due to competition for oxygen by coexisting P accumulating and other heterotrophic bacteria during the initial aeration phase. This view is also supported by comparing oxygen penetration and oxygen uptake rates under low and high ammonium conditions. Therefore, simultaneous nitrification and phosphorus removal in a P removing SBBR appears to be only possible with a sufficiently long oxic period to ensure oxygen availability for nitrifiers. (C) 2002 Elsevier Science Ltd. All rights reserved
Free Keywords:biofilm; enhanced biological phosphorus removal; fluorescence in situ hybridisation; microsensors; nitrification; oxygen budget; sequencing batch biofilm reactor
Comment of the Author/Creator:Date: 2002, JAN
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für marine Mikrobiologie
External Affiliations:Max Planck Inst Marine Microbiol, Mol Ecol Grp, Celsiusstr 1,; D-28359 Bremen, Germany; Max Planck Inst Marine Microbiol, Mol Ecol Grp, D-28359 Bremen, Germany; Tech Univ Munich, Inst Water Qual Control & Waste Management, D-85748 Garching, Germany
Identifiers:ISI:000173085900014 [ID No:1]
ISSN:0043-1354 [ID No:2]
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