The Team Hongyi Guo Ethan Yen Frances Ciolino Team Goals Optimize floc hopper geometry Continuous wasting Floc Blanket Stability Continuous wasting Concentrated waste Less wasted water ID: 1014063
Download Presentation The PPT/PDF document "Sedimentation Tank Hydraulics" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
1. Sedimentation Tank HydraulicsThe TeamHongyi GuoEthan YenFrances Ciolino
2. Team Goals Optimize floc hopper geometryContinuous wastingFloc Blanket Stability
3. Continuous wastingConcentrated wasteLess wasted waterNo valves
4. Hindered Sedimentation VelocityRepeat of Spring ‘12 TeamUpflow VelocitySed Velocity @ 0 Upflow
5. Hindered Sedimentation VelocityResults 0.6 mm/s 1.2 mm/s 1.6 mm/s Why so erratic?
6. Hindered Sedimentation VelocityResults 0.6 mm/s 1.2 mm/s 1.6 mm/sUpflowSedVel 0.086mm 0.15mm/s 0.47mm/s
7. Hindered Sedimentation VelocityUpflow Velocity0.6 mm/s1.2 mm/s1.6 mm/sSed Vel0.086 mm/s0.15 mm/s0.47 mm/sSpring ‘12 0.522 mm/s1.02 mm/s1.10 mm/sVelocity Ratios0.6 mm/s / 1.2mm/s1.2 mm/s / 1.6mm/sSed Vel0.573330.319149Spring ‘120.511760.927273
8. Floc blanket formation10% Plan View Area, Alum Dose 15 mg/LVideo recording floc blanket formation30fpsMade from pictures captured by Labview, 5s/shot Video: http://www.youtube.com/watch?v=Ho5HMh39fLc&list=UUXq9V81yyUOTQYokfp5wXfw&index=1
9. Conc.of Flocs in 15%PVA Floc HopperWasting Rate15ml/min 25ml/min 30ml/min
10. 15%PVA ConclusionsWhat may affect the concentrationEddiesBrightness of camera
11. 20% Plan View AreaDense Concentration on bottomFloc Blanket consistently lower than hopperWhy?Wasting Tube Sucking Flocs through gaps in Hopper?
12. 20% Plan View Area 15 mL/min 25 mL/min 30 mL/min
13. 20% Plan View AreaConclusionsLower Alum Dosage (From 45 mg/L to 15 mg/L)Less large flocs (more dense and less susceptible to flows)
14. 10% Plan View Area 15 mL/min 25 mL/min 30 mL/minVideo of Turbulence: http://www.youtube.com/watch?v=p8mweFDICtQ&list=UUXq9V81yyUOTQYokfp5wXfw&index=2
15. 10% Plan View AreaConclusionsFloc blanket heightEddies affect results for 25%Lower doses
16. Last Continuous WastingSlowly turned up wasting rate2ml/min too fastTurbidimeter maximumLong time to reach turbidimeter
17. SummaryBlock AddedCoagulant DoseLower Wasting RateSmallest Plan View Area
18. Future WorkPlan View AreaWasting RateParticle sizeEffect on concentrationCoagulant doseFloc Blanket Failure
19. Questions?