Electrophoretic light-scattering technology enables real-time monitoring of flocculation process performance and efficient charge neutralization.
The fully automated Zetasizer WT delivers lab-quality on-line zeta potential measurements. The unit connects to a sample stream coming from the water treatment plant after coagulants have been added and uses a pump to flow a sample through the analyzer`s flow cell where zeta potential measurements are made.
The sample is then pumped into waste or returned to the process and replaced with a fresh sample in a continuous, automatic cycle.
Automation and analysis is controlled by an on-board industrial computer running Malvern Link II software.
Measurement results are displayed on a local HMI screen as well as exported into plant SCADA via OPC, Modbus TCP/IP, or wired 4-20mA connections.
Plant operators or a control system use the results to adjust the coagulant dose required to keep zeta potential in a pre-determined range – typically between zero and a slight negative charge.
By also enabling easy measurement of grab samples from other areas in the process, the unit effectively doubles as a laboratory system.