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Environmental Engineering 2

Instructions:

Answer 36 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Flocuation settling
Big Partices Catch little ones
Last chance to remove particles
Forms clear interface between particles and supernatant( big word) - particles move around the water
Settling of floculant particles

2. where is the break point in chlorination and what happens after
Low BOD - High suspended solids - no control - does not match limits`
Big Partices Catch little ones
The second dip in the graph - free chlorine is formed
Want pH high for corrosion but lower for HOCL

3. Land applicatioin worries
Cheap - low biosolids - resistant to shock - simple
Not in my back yard - nutrient overload - crops
Fixed films
No residual

4. CL catch 22
Forms clear interface between particles and supernatant( big word) - particles move around the water
Want pH high for corrosion but lower for HOCL
Remove viruses and bacteria that slipped through filter
Particle in a medium - they don't interact with other particles

5. Bridging
OCL
Add salt
High Molecular Weight Synthetics
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

6. Hinderded Settling
Big Partices Catch little ones
Forms clear interface between particles and supernatant( big word) - particles move around the water
RMS velocity gradient
Remove viruses and bacteria that slipped through filter

7. What is special about chloramine
RMS velocity gradient
Always the same dose needed - but that dose is higher
Particle in a medium - they don't interact with other particles
Need enough to make it happen - don't shear the floc though

8. Advantage of trickling filter
Remove the dead pigs - stuff that would hurt the pumps
Remove as many organic and non organic particles as possible
Residual at tap
Cheap - low biosolids - resistant to shock - simple

9. Compress double layer
The second dip in the graph - free chlorine is formed
RMS velocity gradient
Settling of floculant particles
Add salt

10. Enmeshment in Sweep Floc
Optimal dose depends on charge and concentration
RMS velocity gradient
Chemically - Aerobically - Anaerobically
Very pH dependent - grab pieces

11. Sedimentation
Very pH dependent - grab pieces
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Floating upside down
Always the same dose needed - but that dose is higher

12. 4 mechanisms
Particle in a medium - they don't interact with other particles
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Last chance to remove particles

13. Discrete Sedimentation

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14. Purpose of sedimentation in drinking water
Remove all flocculated particles
High pH and cold is bad
Very pH dependent - grab pieces
Fixed films

15. What is the effect of temperature and pH
Floating upside down
High pH and cold is bad
Easy/Costly hard to dewater
Particle in a medium - they don't interact with other particles

16. Adsorption and Charge Nuetralization
Need enough to make it happen - don't shear the floc though
Optimal dose depends on charge and concentration
OCL
No residual

17. Compression Settling
Forms clear interface between particles and supernatant( big word) - particles move around the water
Add salt
Acts like a sponge - water moves around particles
Floating upside down

18. Advantage/Disadvantage of Aerobic digestion
Easy/Costly hard to dewater
Remove all flocculated particles
Add salt
Low BOD - High suspended solids - no control - does not match limits`

19. Disadvantages of trickling
Remove as many organic and non organic particles as possible
Low BOD - High suspended solids - no control - does not match limits`
Always the same dose needed - but that dose is higher
Settling of floculant particles

20. Stabilization 3 ways
Chemically - Aerobically - Anaerobically
Big Partices Catch little ones
Want pH high for corrosion but lower for HOCL
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

21. Differential Sedimentatioin
Big Partices Catch little ones
Always the same dose needed - but that dose is higher
Remove viruses and bacteria that slipped through filter
Need enough to make it happen - don't shear the floc though

22. Dichotomy of energy level for floculation

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23. Goal for drinking water disinfection
Particle in a medium - they don't interact with other particles
Sedimentation - suspended solids
High pH and cold is bad
Residual at tap

24. Point of pre treatment
Particle in a medium - they don't interact with other particles
Remove the dead pigs - stuff that would hurt the pumps
Remove all flocculated particles
High Molecular Weight Synthetics

25. Purpose of Floculation
Low BOD - High suspended solids - no control - does not match limits`
Residual at tap
No residual
Turn a large number of small particles into a small number of large particles

26. Goal for wastewater disinfection
Last chance to remove particles
No residual
Forms clear interface between particles and supernatant( big word) - particles move around the water
Remove the dead pigs - stuff that would hurt the pumps

27. filtration is the...
Last chance to remove particles
Acts like a sponge - water moves around particles
Fixed films
No residual

28. Secondary Clairfier removes _____
Low BOD - High suspended solids - no control - does not match limits`
Add salt
Optimal dose depends on charge and concentration
Fixed films

29. 4 types of sedimentation
OCL
Need enough to make it happen - don't shear the floc though
Remove as many organic and non organic particles as possible
Discrete - floculation - hindered - compression

30. Headloss change over time
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Residual at tap
The second dip in the graph - free chlorine is formed
Last chance to remove particles

31. What is thickening - name 2 ways
RMS velocity gradient
Settling of floculant particles
Easy/Costly hard to dewater
De watering - belt press and centrifuge

32. Disinfection
Low BOD - High suspended solids - no control - does not match limits`
Want pH high for corrosion but lower for HOCL
Remove viruses and bacteria that slipped through filter
Fixed films

33. Higher pH gives more
De watering - belt press and centrifuge
OCL
High pH and cold is bad
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

34. G
Fixed films
Low BOD - High suspended solids - no control - does not match limits`
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
RMS velocity gradient

35. Purpose of sedimentation in waste water
Want pH high for corrosion but lower for HOCL
Remove as many organic and non organic particles as possible
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Need enough to make it happen - don't shear the floc though

36. Primary clarifier uses _____ removes _____
Very pH dependent - grab pieces
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
High pH and cold is bad
Sedimentation - suspended solids