Technical Basis Towards Digital Wastewater Treatment Plant

The TUD integrated model was used to optimize BNR processes (a modified A²/O process and an A/O process) in a wastewater treatment plant (WWTP) in Beijing.Three parameters in the default TUD model were calibrated with iNSF=0.06gN/gCOD, i_NXS=0.06gN/gCOD and K_NH4=1.5g N/m³.The influent COD was characterized with S_A=6.52%, S_F=36.71%, S_I=12.58%, X_S=32.17% and X_I=12.02%.The modeling experiments indicated that the weak P-removal capacity of the modified A²/O process was due to less VFA and short anaerobic HRT. For optimization purpose, a series of modeling experiments was conducted. Modeling demonstrated that the P-removal efficiency might be improved by either bigger anaerobic reactor volume or external carbon resource or canceling primary settler. Also, the process modification such as either a UCT process or phosphate recovery integrated was demonstrated as some feasible measures for rnodification.Modeling testified that the A/O process needed to operate under some optimal arameters: SRT=10¹5d, R=40⁷0%, r=100²00% and DO=0.8g/m³.