title: Operational conditions for successful partial nitrification in a sequencing batch reactor (SBR) based on process kinetics.
abstract: The objective of this study is to analyze the factors affecting the performance of partial nitrification in a sequencing batch reactor (SBR) using kinetic models. During the 4-month operation, dissolved oxygen (DO) and influent ammonia concentration were selected as operating variables to evaluate nitrite accumulation. Stable partial nitrification was observed with two conditions, influent ammonia concentration of 190 mg N/L and a DO of 0.6-3.0 mg/L as well as influent ammonia concentration of 100 mg N/L and a DO of 0.15-2.0 mg/L with intermittent aeration. At a DO of 0.6-3.0 mg O2/L and influent ammonia concentration of 90 mg N/L, nitrite-oxidizing bacteria growth was not suppressed. Kinetic parameters were determined or estimated with batch tests and model simulation. The kinetic model predicted the SBR performance well.
authors.affiliation: a Department of Civil and Environmental Engineering , University of Western Ontario , London , Canada.
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Liu
authors.affiliation: b Department of Chemical and Biochemical Engineering , University of Western Ontario , London , Canada.
authors.forename: Mingu
authors.initials: M
authors.lastname: Kim
authors.affiliation: a Department of Civil and Environmental Engineering , University of Western Ontario , London , Canada.|b Department of Chemical and Biochemical Engineering , University of Western Ontario , London , Canada.
authors.forename: George
authors.initials: G
authors.lastname: Nakhla
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology; D007700:Kinetics; D058465:Nitrification; D010100:Oxygen / Q000378:metabolism*
chemical_list: D000641:Ammonia; D010100:Oxygen
keywords: Partial nitrification; dissolved oxygen; free ammonia; kinetic analysis