Desalination
Desalination Pretreatment Dosing
Automatic flocculant dosing with SDI early warning significantly reduced membrane fouling.
Key Metric
<3
SDI value
Challenge
Tidal water-quality swings made flocculant dosing hard to match; SDI exceedances threatened RO membranes.
Solution
Flocculant dosed by dual turbidity/flow ratio with online SDI alarming.
Results
- SDI stable below 3
- Markedly less fouling
- Optimized flocculant use
