Define the reuse endpoint
Clarified water must meet the needs of the operation receiving it. Record suspended solids, turbidity, hardness, conductivity, oil or organics where relevant and any limit imposed by nozzles, heat exchangers, membranes or product quality.
A visually clear sample is not a complete reuse specification.
Test clarification and downstream filtration
Compare polymer candidates after the actual coagulant and pH-adjustment sequence. Measure settling or flotation, clarified-water quality, sludge volume, filter headloss and backwash behavior.
Include recycle accumulation and process additives that may alter particle charge or solution preparation.
Balance chemical cost with recovered water
Normalize PAM consumption to active polymer and treated solids or water volume, then add coagulant, sludge handling, filter run time and production interruptions.
Select the widest reliable operating window and document the feed conditions that require a new jar test.