... Steps to establish a modeling WWTP Take Qinghe WWTP as an example a) Step Abstracting wastewater treatment process in the WWTP To establish a modeling WWTP, the first step is to carefully analyze ... cleaned on time and calibrated periodically, to guarantee the validity of data Table show what kinds of instruments are needed in Qinghe WWTP Table.4 Collocation of online instruments in Qinghe ... conventional parameter apparatus such as temperature, pH and conductance etc., and water quality analysis apparatus such as NH4+-N, PO43—P and COD etc The instruments should be maintained regularly,...