title: Assessment of nitrogen and phosphorus removal in an intermittently aerated sequencing batch reactor (IASBR) and a sequencing batch reactor (SBR).
abstract: Biological nitrogen and phosphorus removal was investigated in an intermittently aerated sequencing batch reactor (IASBR) and a sequencing batch reactor (SBR). The removal efficiencies of ammonium-nitrogen (NH4(+)-N) were 100% in both reactors in steady operation state. The total nitrogen (TN) removal efficiencies were 90.4% in the IASBR and 79.3% in the SBR, while the total phosphorus (TP) removal efficiencies were 88.8% in the IASBR and 82.3% in the SBR. The efficiencies of simultaneous nitrification and denitrification (SND) were 90.4% in the IASBR and 79.3% in the SBR, indicating that the IASBR was more efficient than the SBR in SND. The sludge in the IASBR had a P release capability of 16.6 mg P/g VSS (volatile suspended solids) but only 7.5 mg P/g VSS in the SBR.
authors.affiliation: Civil Engineering, College of Engineering and Informatics, National University of Ireland, Galway, Ireland. xinmin.zhan@nuigalway.ie
authors.forename: Min
authors.initials: M
authors.lastname: Pan
authors.forename: Tianhu
authors.initials: T
authors.lastname: Chen
authors.forename: Zhenhu
authors.initials: Z
authors.lastname: Hu
authors.forename: Xinmin
authors.initials: X
authors.lastname: Zhan
mesh_terms: D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D009584:Nitrogen / Q000302:isolation & purification*; D010758:Phosphorus / Q000302:isolation & purification*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen