Transcription of Lecture 4: Sedimentation
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Islamic University of Gaza Environmental Engineering DepartmentWaterTreatmentWater TreatmentEENV 4331 Lecture 4: SedimentationDr. Fahid Rabah14. Sedimentation in water Definition of Sedimentation :It is the process of removing solid particles heavier than waterby gravity force. Particles that will settle within a reasonable period of timecan be removed using a Sedimentation tank (also calledclarifiers). Sedimentationisusedinwatertreatmentatthe locationsindicated in Figures 1 through Sedimentation in water Applications of Sedimentation in water treatment:pp1. Plain settling ( or pre Sedimentation ) of river surfacewater .2. In filtration treatment plants treating surface water toremoves flocculated solids.
4.5 Design of Sedimentation tanks 4.5.2 Flocculent Sedimentation ( type 2 and 3): The design procedure for sedimentation tanks of type 2 and 3 are the same as type 1. The difference is mainly in the overflow rate (v 0) .The following table gives the design criteria of these two types.
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