TSS

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Author:
saitclt
ID:
188822
Filename:
TSS
Updated:
2012-12-12 09:19:07
Tags:
TSS ENVS348 SAIT CLT2
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Description:
ENVS348
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  1. Define TSS
    Total Suspended Solids - inorganic suspended matter with a diameter >4.5 um
  2. 3 Types of Mixtures
    • Solutions
    • Suspensions
    • Colloids
  3. Properties of Colloids
    • Usually do not settle out - so small that they remain in medium
    • Brownian motion - random zigzags due to collisions
  4. Which organic materials would a 4.5um filter remove?
    • bacteria
    • emulsions
    • algae
    • oil & grease
  5. 6 problems with TSS
    • Aesthetics
    • Filterability
    • Disinfection
    • Pumping
    • Corrosion
    • Eutrophication
  6. 5 ways to measure TSS
    • XRF
    • XRD
    • PSA - particle size analyzer
    • SDI - silt density index
    • Turbidity
  7. What does PSA & SDI stand for
    • particle size analyzer
    • silt density index
  8. Which optical properties of water does turbidity account for?
    • size
    • shape
    • color
    • refractive index
  9. What does Nephelometry of a Nephelometer measure?
    turbidity
  10. Which law gives the terminal Velocity o a particle falling through a medium?
    Stokes Law
  11. Ways to increase settling efficiency (3)
    • use very thin film of continuous media
    • larger tanksĀ 
    • slow flow rates
  12. Name the 3 steps in Clarification
    • Coagualtion
    • Flocculation
    • Sedimentation
  13. Coagulation neutralizes the surface charge by;
    • increasing ionic strength (add salts)
    • adjusting pH
    • add coagulant (Alum)
  14. two main filtration processes
    • surface
    • depth
  15. In which zone of a clarifier does coagulations occur?
    Rapid Mix Zone
  16. In which zone of the clarifier does flocculation occur?
    Slow Mix Zone
  17. In a flash mixer, why are the coagulant chemicals mixed violently when added to the water?
    to evenly distribute the chemicals
  18. 2 Benefits of Inclined Plate Clarifiers?
    • Settling time is reduced
    • takes up less space then ponds or tanks
  19. benefit of pressure filters?
    speeds up filtration process
  20. When using a Finer Surface Filter, does water or particles pass through?
    water

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