Updated activated sludge model number 1 parameter values for improved prediction of nitrogen removal in activated sludge processes: validation at 13 full-scale plants.
The Activated Sludge Model number 1 (ASM1) is the main model used in simulation projects focusing on nitrogen removal. Recent laboratory-scale studies have found that the default values given 20 years ago for the decay rate of nitrifiers and for the heterotrophic biomass yield in anoxic conditions were inadequate. To verify the relevance of the revised parameter values at full scale, a series of simulations were carried out with ASM1 using the original and updated set of parameters at 20 degrees C and 10 degrees C. The simulation results were compared with data collected at 13 full-scale nitrifying-denitrifying municipal treatment plants. This work shows that simulations using the original ASM1 default parameters tend to overpredict the nitrification rate and underpredict the denitrification rate. The updated set of parameters allows more realistic predictions over a wide range of operating conditions.
CEMAGREF, UR QELY, 3 bis quai Chauveau, CP220, F-69336 Lyon, France. jean-marc.choubert@cemagref.fr
Jean-Marc
JM
Choubert
Anne-Emmanuelle
AE
Stricker
Aurélien
A
Marquot
Yvan
Y
Racault
Sylvie
S
Gillot
Alain
A
Héduit
D019149:Bioreactors; D008956:Models, Chemical; D009584:Nitrogen / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical; D018508:Water Purification / Q000379:methods
D012722:Sewage; D014874:Water Pollutants, Chemical; D009584:Nitrogen