E-Andrew Sindt Creative Component S11.pdf

3.6.2 Calibration of BNR-S1 ModeThe simulator parameter values for the calibrated regular mode were entered in the BNR-S1 setup andthe simulation was run to see how well the simulator predicted effluent quality for the BNR-S1 mode.Effluent parameters requiring correction were noted and a table was setup (Appendix II, Table AII.7) forthe adjustment of simulator parameters required to achieve a more accurate prediction of totalnitrogen, ammonia, nitrite, nitrate, and total phosphorus. However, this time the variations in the threesimulator parameters were by 5% increments (Table 3.7). The simulation run that provided the leastamount of percent error was selected and the maximum Vesilind settling velocity was adjusted toachieve maximum accuracy in TSS prediction. Next, accuracy of ammonia prediction was improved byadjusting the substrate ammonia half saturation concentration for ammonia oxidizing bacteria. Finally,the effluent TP concentration prediction was improved by adjusting the aerobic P/PHA uptake ratio. Alladjusted simulator parameters were selected based on the sensitivity of the effluent characteristics tothe simulator parameters.Table 3.7- Simulation parameters for BNR-S1 mode calibrationVariation Range fromDefault ValueSimulation ParameterLower Upper Increment ofvariationTarget Effluent Parameter(s) cHeterotrophic yield -30% 0 5% NH 3, NO 2, TP, F. COD, TSSAOB max. spec. growth rate -40% -15% 5% NH 3, NO 2, NO 3NOB max spec growth rate -40% -15% 5% TN, NO 2, NO 3, TSSMax. Vesilind settling velocity -30% 0 5% NH 3, NO 2, TP, TSSNH 3 half saturation conc. (AOB) 0 80% 5% NH 3, NO 2, TPP/Ac release ratio (PAO) 0 30% 5% TPc bold denotes primary target effluent parameter for specific simulation parameter3.7 Analysis of BNR-S2 modeCalibrated simulator parameter values for the BNR-S1 mode were entered into the BNR-S2 setup andthe simulation was run. The ability of the simulator to predict effluent quality using calibrated BNR-S1simulator parameter values in the BNR-S2 setup was assessed.3.8 Effect of WidthThe implications of an error in the width of the SBR as it was defined in BioWin were investigated inorder to determine if modeling data obtained up to that was still representative of the SBR. Data fromthe SBR with the initial width (12.6 m) was compared with data obtained using the corrected width (13.8m).40