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Research on Tube Settlers and Flocculation

Research on Tube Settlers and Flocculation. By: Andrea Gruber Peter Crysdale. Introduction. Coagulation/Flocculation Mixing speeds Sedimentation and Tube Settlers Critical velocity Travel Distance. Objectives. Aid in design of CEE 492 conical flocculation and sedimentation tank

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Research on Tube Settlers and Flocculation

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  1. Research on Tube Settlers and Flocculation By: Andrea Gruber Peter Crysdale

  2. Introduction • Coagulation/Flocculation • Mixing speeds • Sedimentation and Tube Settlers • Critical velocity • Travel Distance

  3. Objectives • Aid in design of CEE 492 conical flocculation and sedimentation tank • Create small scale flocculator • Tube Settlers • Optimal tube diameter • Produce low turbidity water

  4. Methods • Two Separate Designs • System Design One • Separate Flocculation and Sedimentation Tanks • Baffles to divide tank • System Design Two • Single Reactor System

  5. Design of System 1 • Flocculation Tank • Volume = 970 mL • Tank Residence Time = 30 min • Tube Settler • Tube Diameter = 2.5 cm • Tube Length = 1 m • Tube Residence Time = 12 min

  6. Tube Settler Tap water influent 2 Peristaltic Pumps Each w/ 2 pump heads Turbidimeter Clay Stock pH probe Stir Plate Reactor w/ Baffle Flocculation Tank Alum Stock Sedimentation Tank System 1 Design

  7. System 1 - Trial 1

  8. System 1 – Trial 2

  9. System 1- Trial 3

  10. System 1 – Trial 4

  11. System 1 – Trial 5

  12. System 2 - Design

  13. System 2- Trial 6

  14. Trial 6 – Floc Blanket

  15. System 2 – Trial 7

  16. System 2 – Trial 8 Pulse Added

  17. System 2 – Trial 9

  18. Future Work • Influent Turbidities • Threshold at which floc blanket forms • Tube Settler Diameters

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