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Nitrogen-limitation-induced carbon and phosphorus fluxes in anaerobic/aerobic sequencing batch reactors

ARAN - Access to Research at NUI Galway

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dc.contributor.author Wu, Guangxue en
dc.contributor.author Rodgers, Michael en
dc.date.accessioned 2010-05-20T14:24:29Z en
dc.date.available 2010-05-20T14:24:29Z en
dc.date.issued 2010 en
dc.identifier.citation Wu, G., & Rodgers, M. (2009). Nitrogen-limitation-induced carbon and phosphorus fluxes in anaerobic/aerobic sequencing batch reactors.Paper presented at the 3rd European Water & Wastewater Management Conference, Sep. 22-23, 2009, ThinkTank Birmingham, UK. en
dc.identifier.uri http://hdl.handle.net/10379/1117 en
dc.description.abstract Enhanced biological phosphorus removal (EBPR) has been applied widely in wastewater treatment plants. However, deterioration or failure of EBPR often happens because: (i) of the dominance of glycogen-accumulating organisms (Type I), or (ii) there is no anaerobic carbon uptake or phosphorus release (Type II). In this study, carbon and phosphorus fluxes under nitrogen-limitation conditions in anaerobic/aerobic sequencing batch reactors (SBR10 at 10 oC and SBR20 at 20 oC) without EBPR (Type II) were examined. Zoogloea sp. was detected in all samples from both reactors using the fingerprinting technique. In spite of the absence of EBPR, the biomass total phosphorus content of 3.8% in SBR10 and 4.8% in SBR20 was still high. Phosphorus removal could have occurred through biomass assimilation, chemical precipitation (including a precursor nucleation phase and then a crystallization phase), and contribution from extracellular polymeric substances. Under nitrogen-limitation conditions, the polyhydroxybutyrate content increased from 13.9% to 32.7% in SBR10 and from 8.3% to 28.8% in SBR20; while the intracellular carbohydrate content was 9.9% in SBR10 and 9.6% in SBR20, and the extracellular carbohydrate content was 7.8% in SBR10 and 6.0% in SBR20. KEY WORDS en
dc.description.sponsorship Irish Research Council for Science, Engineering and Technology Postdoctoral Fellowship. en
dc.format Application/pdf en
dc.language.iso en en
dc.publisher Elseiver en
dc.subject Zoogloea sp en
dc.subject Polyhydroxybutyrate en
dc.subject Phosphorus precipitation en
dc.subject Nitrogen limitation en
dc.subject Extracellular polymeric substances en
dc.subject Enhanced biological phosphorus removal en
dc.subject Carbon metabolism en
dc.subject Civil engineering en
dc.title Nitrogen-limitation-induced carbon and phosphorus fluxes in anaerobic/aerobic sequencing batch reactors en
dc.type Article en
dc.description.peer-reviewed peer-reviewed en

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