In this guide
This article explains the treatment objective, the design information that matters and the operating checks that help keep the system practical after installation.
EDI is a polishing process
EDI equipment is designed for relatively clean, low-salinity feed. It should not be used as a substitute for raw-water pretreatment. Feed outside the manufacturer’s limits can cause scaling, fouling or poor product quality.
Hardness and carbon dioxide deserve attention
Residual hardness can create scale, while carbon dioxide can pass through RO in ways that increase ionic load on the polishing step. The exact control strategy depends on the selected EDI system and water chemistry.
Trend product and concentrate performance
Conductivity or resistivity, flow, pressure and electrical operating data help show whether the EDI is stable. Sudden changes should be investigated alongside RO permeate quality rather than adjusting the EDI in isolation.
Need a treatment recommendation for your water?
Send the water source, intended use, approximate demand and any available test report. Waterwise Bangladesh can review the requirement and discuss an appropriate treatment approach.