Helical gear unit H3 flender ag H3-HH8A

Flender/Flender Gear Units/Helical gear unit H3

DO in the 3 rd aerobic cell and the blower control system. Fallback control systems in case of failure also need to be incorporated Modifications to the SCADA system to incorporate all the control changes For FF-FB ammonia on DO control Installation of ammonia sensors on the outlet of the aerobic cells as above as well as on the influent to measure influent ammonia cascaded control system that links the measured influent ammonia, the model that predicts oxygen demand based on the measured influent ammonia, the measured cell 4 effluent ammonia with DO in the 3 rd aerobic cell and the blower control system Modifications to the SCADA system For practical implementation additional evaluation of the above will be required. For example, an engineer with experience in wastewater treatment process and control systems engineering will have to be appointed to carry out further modelling and simula tion as well as design the control algorithms. The engineer will also recommend any modifications require to the existing blowers control system and/or the current operation of the bioreactor lanes to determine how best to incorporate the changes with minimum number of additional sensors and control sy stems to maintain ease of operation and control. In addition, detailed sensor and instrumentation ev aluation will need to be conducted in order to install practically functional instruments and control system. 4-2 Table 4-1 shows model predicted aeration energy consumption and cost savings as well as final effluent quality when these measures are implemented. Also included are the 2 baseline values for comparison. Table 4-1: Zeekoegat WWTP Model Predicted Parameters for Implementing Advanced Process Control (with ammonia based aeration control) Units Baseline Advanced Process Control FB Cascade NH 4+/DO FF-FB NH 4+/DO Aeration Energy Parameter Consumption MWh/yr 4,6 3,9 3,9 Consumption Saving MWh/yr 7 7 % Consumption Saving %