E-Andrew Sindt Creative Component S11.pdf

6) for each simulation run was compiled and compared to find the simulation run that best fit theobserved data. A percent value was used in order to better demonstrate error present in smallernumbers. An emphasis was placed on matching effluent total nitrogen and total phosphorusconcentrations.∑ [6]Where:= value of predicted (simulated) effluent parameter= value of observed effluent parameter (data from Table 3.3)= effluent parameter3.6.1 Calibration of Regular ModeThree simulator parameters found to have significant effects on effluent total nitrogen, ammonia,nitrite, and nitrate concentrations were chosen for the calibration of the regular mode. These threesimulator parameters were heterotrophic yield, ammonia oxidizing bacteria (AOB) maximum specificgrowth rate, and nitrite oxidizing bacteria (NOB) maximum specific growth rate (Table 3.6). Threetables, one for each combination of variables, were set up in which one parameter was varied from zeroto 60% by increments of 10% across the top and the other two parameters were varied at the same ratedown the length of the table (see Appendix II, Table AII.3). The parameter values from the simulationrun which provided the least percent error were selected. After that, the maximum Vesilind settlingvelocity was adjusted to reduce the deviation of predicted effluent TSS values from observed. Next, anexpansion on the selected simulation run was completed with a 1% incremental variation of eachsimulator parameter in the range of -4% to +4% of the initial run optimum parameters (see Appendix II,Table AII.6). From this analysis, the simulation run yielding the lowest percent error was selected andcalibration for regular mode was complete.Table 3.6- Simulator parameters for regular mode calibrationAdjustment Range fromDefault ValueSimulation ParameterLower Upper Increment ofvariationTarget EffluentParameter(s) cHeterotrophic yield -60% 0 10% TN, NH 3, NO 3AOB max. spec. growth rate -60% 0 10% TN, NH 3, NO 2, TSSNOB max spec growth rate -60% 0 10% NO 2, TSSMax. Vesilind settling velocity -60% 0 10% NH 3, NO 2, TP, TSSc bold denotes primary target effluent parameter for specific simulation parameter39