Screw Press Start-Up Procedure

Start-up sequence

1. 1
   Pre-start checks

   Confirm guards in place, no alarms, polymer ready, wash-water supply available and drain lines open.

2. 2
   Start wash-water and screen wetting

   Wet the screen so the first flocs drain freely rather than blinding a dry screen.

3. 3
   Start the screw rotation

   Begin at a moderate speed to confirm smooth, quiet running and correct direction.

4. 4
   Start polymer dosing

   Establish flocculation in the tank before sludge arrives so the first sludge is already conditioned.

5. 5
   Introduce sludge feed slowly

   Ramp the feed pump up gradually and watch floc formation and filtrate clarity.

6. 6
   Trim to target

   Adjust polymer, screw speed and back pressure until cake solids and filtrate quality reach targets.

Why sequence matters