Simulation of full-scale wastewater treatment biological processes

Predicting wastewater treatment plant’s efficiency during extreme influent variations can be made by using
modeling and simulation tools. The studied wastewater treatment plant’s biological stage consists in two
identical lines with biological phosphorous removal and nitrification-denitrification. The influent and effluent
quality parameters were monitored for a plant with advanced biological wastewater treatment stage.
Different fractionation models were considered and the simulations were developed using WEST software.
ASM1temp and ASM3temp models were used, both being based on IWA’s Activated Sludge Models and
extended with temperature corrections. Compliance with the experimental data obtained from the
wastewater treatment plant was met after the model’s calibration.