A treatment plant has a horizontal flow sedimentation basin with a depth of 5 m, width of 7.5m, length of 45 m, and process flow rate of 450 m3 /h. What removal percentage should be expected for particles that have settling velocities of 1.0 and 2.5 m/h? What is the minimum size of particles that would be completely removed? Assume the particle density is 2650 kg/m3. The water temperature is 15 oC.

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