title: Effect of baffles on nitrification in aerated facultative lagoons in a cold climate.
abstract: Tracer studies performed in two aerated facultative lagoons indicate some bypass and an overall hydraulic regime close to completely-mixed. Results were used to calibrate a hydraulic model based on the tanks-in-series approach. The hydraulic model was combined with a simple "death-regeneration" biokinetic model to simulate seasonal nitrification as observed over a three year period. Modifications were made to the hydraulic model to represent the effect of baffle installations to 1) eliminate bypass and 2) impose a plug-flow regime. Simulation results indicate there is some gain to eliminating bypass but that imposing a plug-flow regime would increase biomass washout rates and hinder nitrification.
authors.affiliation: Department of Civil, Geological and Mining Engineering, Ecole Polytechnique of Montreal, P.O. Box 6079, Station Centre-Ville, Montreal (Quebec), H3C 3A7, Canada. dwight.houweling@polymtl.ca
authors.forename: D
authors.initials: D
authors.lastname: Houweling
authors.forename: F
authors.initials: F
authors.lastname: Chazarenc
authors.forename: R
authors.initials: R
authors.lastname: Leduc
authors.forename: Y
authors.initials: Y
authors.lastname: Comeau
mesh_terms: D019149:Bioreactors; D002980:Climate; D003080:Cold Temperature; D003198:Computer Simulation; D007700:Kinetics; D008954:Models, Biological; D009584:Nitrogen / Q000378:metabolism*; D010100:Oxygen / Q000032:analysis; D012621:Seasons; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D014872:Water Movements
chemical_list: D009584:Nitrogen; D010100:Oxygen