Solutions to Assignment 2_Q3 & Q4

Solutions to Assignment 2_Q3 & Q4 - Assignment 2 3....

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Assignment 2 3. Fig. 9.1. Bar rack: Large debris are prevented from entering the intake pipe. Traveling screen: Coarse suspended matter such as small sticks, fish, and pieces of material are removed from the water. Coagulant addition and mixing: A chemical agent is added to the water and mixed to react with colloidal and suspended matter. Flocculation: Gentle mixing is applied to allow smaller flocs to contact and form larger floes. Sedimentation: Floes and other suspended particles are allowed to settle under quiescent conditions. Filtration: Fine particulate matter remaining in the water after sedimentation is removed in the filter. There is also some removal of microorganisms. Protozoans are removed in the filter. Chlorine addition: Chlorine is added to inactivate pathogens remaining in the water. The wet well allows sufficient time for the chlorine to inactivate the pathogens before the water is sent to the distribution system. Filter press: Sludge collected in the sedimentation basin is concentrated in the filter press.
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This note was uploaded on 09/13/2011 for the course CIVL 242 taught by Professor Gh during the Fall '09 term at HKUST.

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Solutions to Assignment 2_Q3 & Q4 - Assignment 2 3....

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