Home > Preview
The flashcards below were created by user
on FreezingBlue Flashcards.
Total Suspended Solids - inorganic suspended matter with a diameter >4.5 um
3 Types of Mixtures
Properties of Colloids
- Usually do not settle out - so small that they remain in medium
- Brownian motion - random zigzags due to collisions
Which organic materials would a 4.5um filter remove?
- oil & grease
6 problems with TSS
5 ways to measure TSS
- PSA - particle size analyzer
- SDI - silt density index
What does PSA & SDI stand for
- particle size analyzer
- silt density index
Which optical properties of water does turbidity account for?
- refractive index
What does Nephelometry of a Nephelometer measure?
Which law gives the terminal Velocity o a particle falling through a medium?
Ways to increase settling efficiency (3)
- use very thin film of continuous media
- larger tanks
- slow flow rates
Name the 3 steps in Clarification
Coagulation neutralizes the surface charge by;
- increasing ionic strength (add salts)
- adjusting pH
- add coagulant (Alum)
two main filtration processes
In which zone of a clarifier does coagulations occur?
Rapid Mix Zone
In which zone of the clarifier does flocculation occur?
Slow Mix Zone
In a flash mixer, why are the coagulant chemicals mixed violently when added to the water?
to evenly distribute the chemicals
2 Benefits of Inclined Plate Clarifiers?
- Settling time is reduced
- takes up less space then ponds or tanks
benefit of pressure filters?
speeds up filtration process
When using a Finer Surface Filter, does water or particles pass through?
Home > Flashcards > Print Preview