The concentrations of COD, NH4 + -N, TN, TP and SS in the wastewater, and MLSS in the oxidation ditch, were measured according to the standard methods (CEPD, 2002).
The pH was measured with a pH meter
The DO concentration in the oxidation ditch was determined online using DO probes (Advanced HACH LDO Process Dissolved Oxygen Probe).
The ORP in the oxidation ditch was determined online using Differential ORP Digital Sensors (GLI DRD1R5) connected to a HACH sc100 Universal Conntroller (LXV401.5200002).
The concentrations of COD, NH4 + -N, TN, TP and SS in the wastewater, and MLSS in the oxidation ditch, were measured according to the standard methods (CEPD, 2002).
The pH was measured with a pH meter
The DO concentration in the oxidation ditch was determined online using DO probes (Advanced HACH LDO Process Dissolved Oxygen Probe).
The ORP in the oxidation ditch was determined online using Differential ORP Digital Sensors (GLI DRD1R5) connected to a HACH sc100 Universal Conntroller (LXV401.5200002).
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