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DAFSense - Coagulant Dosing and Control System
Pi’s DAFSense coagulation and dosing controller is an integrated controller that accepts multiple inputs from multiple sensors including inlet solids pH, and flow. From these measured parameters, the DAFSense outputs a flow proportional coagulation control signal that can go to a coagulant and flocculant dosing pump.
Each system needs to be designed and specified for each water treatment plant and that is a service offered by Pi.
Prior to changing existing controls, it may be beneficial to install and monitor how well an existing coagulation controller is working by installing a coagulation analyser, that can monitor and record the performance of the existing coagulant control system be it manual or automatic.
Other DAF coagulation control systems are PLC or industrial PC based; they are complex, extremely expensive and have rarely been described as ‘robust’ or ‘reliable’.
Pi’s DAFSense coagulation controller is instrument based (stand alone) and fully configurable to manage variations between sites or variations within sites. It’s sensors are robust and well proven into integrated sensors.
Outlet suspended solides – The signal from the oulet suspended solids is used to modify the proportionality of the feed forward control from the flow and the inlet solids meter. This means that the control can be used to control the coagulant dose to meet a desired set point.
The DAFSense coagulation controller can be used as a coagulation monitor (monitoring an existing system), a coagulation analyser (providing information prior to installing a coagulation control philosophy) or a full scale coagulation controller, either stand alone or via SCADA.
The DAFSense can be configured with various sensors, flow cells, communications options and consultancy services to provide the industrial waste water treatment plant professionals with everything they need to ensure optimal control.
Options include:
- pH Control
- Remote Access over LAN
- Remote Access over GPRS
- Modbus over LAN
- Modbus over RS458
- Site sensor inputs
- Data logging
- Onboard PID controls
- Direct coagulant pump control
- Coagulant pump control via SCADA