Effect of baffles on nitrification in aerated facultative lagoons in a cold climate.
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.
Houweling
D
D
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
Chazarenc
F
F
Leduc
R
R
Comeau
Y
Y
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
D009584:Nitrogen; D010100:Oxygen