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- The geometry of the overall sedimentation tank
- The geometry and capture velocity of the plate settlers above the floc blanket
- The geometry and capture velocity of the potential plate settlers in the floc blanket
- The correlation between the plate settlers with a capture velocity of 1 mm/s and the plate settlers with a capture velocity of 0.12 mm/s
- The transportation of flocs to the floc hopper when there is a high upflow velocity in the sedimentation tank