Water Treatment Plant Operator how-to
How to Backwash a Filter
Backwashing cleans filter media so it can keep removing particles effectively. Follow your plant’s procedure.
Backwashing cleans filter media so it can keep removing particles effectively. Follow your plant’s procedure. In short: check; take; drain, then complete the remaining steps below.
Step by step
Check filter indicators (headloss, turbidity breakthrough or run time) to confirm backwash is needed.
Take the filter out of service by closing the influent and effluent valves.
Drain the water level down to the specified point.
Start surface wash or air scour if equipped.
Open the backwash valve and gradually increase flow to the target rate.
Backwash until the wash water runs clear, then stop and allow media to settle.
Filter-to-waste if required, then return the filter to service and record the event.
Safety reminders for water treatment plant operators
- Wear PPE and use proper procedures when handling chlorine and other chemicals
- Follow confined-space entry procedures for tanks, vaults and wet wells
- Lock out pumps and equipment before maintenance
- Stay current on vaccinations and hygiene when working with wastewater
Key terms
Coagulation · Flocculation · Sedimentation · Filtration · Disinfection · Chlorine residual: see the full water treatment plant operator glossary.