Fig 4-8: Flow Diagram of conventional surface water treatment plant (
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CE 326 Principles of Environmental Engineering
Department of Civil, Construction and Environmental Engineering
Iowa State University
March 3, 2008
Tim Ellis, Ph.D., P.E.
Coagulation = Charge reductionFlocculation = Contact of particles
Alkalinity in CoagulationNeeded to neutralize acid formed
Let’s say v0 = 0.20 mm/sWhat % removal for particles with settlingvelocity = 0.15 mm/s?