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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. Advantage/Disadvantage of Aerobic digestion
Sedimentation - suspended solids
Easy/Costly hard to dewater
Remove as many organic and non organic particles as possible
RMS velocity gradient

2. Higher pH gives more
OCL
Last chance to remove particles
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Optimal dose depends on charge and concentration

3. Differential Sedimentatioin
Particle in a medium - they don't interact with other particles
Remove the dead pigs - stuff that would hurt the pumps
Floating upside down
Big Partices Catch little ones

4. What is the effect of temperature and pH
Remove viruses and bacteria that slipped through filter
High pH and cold is bad
Chemically - Aerobically - Anaerobically
No residual

5. Purpose of sedimentation in waste water
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
The second dip in the graph - free chlorine is formed
Remove as many organic and non organic particles as possible
Sedimentation - suspended solids

6. Adsorption and Charge Nuetralization
Low BOD - High suspended solids - no control - does not match limits`
Optimal dose depends on charge and concentration
Remove as many organic and non organic particles as possible
Chemically - Aerobically - Anaerobically

7. CL catch 22
The second dip in the graph - free chlorine is formed
Want pH high for corrosion but lower for HOCL
Remove as many organic and non organic particles as possible
Low BOD - High suspended solids - no control - does not match limits`

8. Enmeshment in Sweep Floc
Very pH dependent - grab pieces
De watering - belt press and centrifuge
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Easy/Costly hard to dewater

9. Advantage of trickling filter
The second dip in the graph - free chlorine is formed
Easy/Costly hard to dewater
Fixed films
Cheap - low biosolids - resistant to shock - simple

10. Headloss change over time
The second dip in the graph - free chlorine is formed
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Chemically - Aerobically - Anaerobically
Cheap - low biosolids - resistant to shock - simple

11. Compress double layer
Optimal dose depends on charge and concentration
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Remove as many organic and non organic particles as possible
Add salt

12. Discrete Sedimentation

13. Flocuation settling
High pH and cold is bad
Remove the dead pigs - stuff that would hurt the pumps
Acts like a sponge - water moves around particles
Settling of floculant particles

14. Point of pre treatment
Easy/Costly hard to dewater
Turn a large number of small particles into a small number of large particles
Remove the dead pigs - stuff that would hurt the pumps
Particle in a medium - they don't interact with other particles

15. What is thickening - name 2 ways
Settling of floculant particles
Remove the dead pigs - stuff that would hurt the pumps
Fixed films
De watering - belt press and centrifuge

16. Goal for drinking water disinfection
Need enough to make it happen - don't shear the floc though
Residual at tap
Turn a large number of small particles into a small number of large particles
Remove all flocculated particles

17. 4 mechanisms
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
High pH and cold is bad
RMS velocity gradient
No residual

18. What is special about chloramine
Always the same dose needed - but that dose is higher
Fixed films
Turn a large number of small particles into a small number of large particles
Cheap - low biosolids - resistant to shock - simple

19. Secondary Clairfier removes _____
Remove as many organic and non organic particles as possible
Sedimentation - suspended solids
Acts like a sponge - water moves around particles
Fixed films

20. Sedimentation
Floating upside down
Acts like a sponge - water moves around particles
Optimal dose depends on charge and concentration
RMS velocity gradient

21. Bridging
High Molecular Weight Synthetics
Very pH dependent - grab pieces
Sedimentation - suspended solids
Want pH high for corrosion but lower for HOCL

22. Compression Settling
High pH and cold is bad
Particle in a medium - they don't interact with other particles
Acts like a sponge - water moves around particles
Need enough to make it happen - don't shear the floc though

23. Land applicatioin worries
Fixed films
Remove viruses and bacteria that slipped through filter
Not in my back yard - nutrient overload - crops
Discrete - floculation - hindered - compression

24. Purpose of Floculation
High Molecular Weight Synthetics
De watering - belt press and centrifuge
Add salt
Turn a large number of small particles into a small number of large particles

25. Dichotomy of energy level for floculation

26. Hinderded Settling
Floating upside down
Forms clear interface between particles and supernatant( big word) - particles move around the water
Remove all flocculated particles
Settling of floculant particles

27. Goal for wastewater disinfection
RMS velocity gradient
High Molecular Weight Synthetics
Remove viruses and bacteria that slipped through filter
No residual

28. Primary clarifier uses _____ removes _____
Sedimentation - suspended solids
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
High pH and cold is bad

29. Purpose of sedimentation in drinking water
Fixed films
High Molecular Weight Synthetics
Remove all flocculated particles
Remove the dead pigs - stuff that would hurt the pumps

30. Stabilization 3 ways
Chemically - Aerobically - Anaerobically
Remove viruses and bacteria that slipped through filter
Add salt
Low BOD - High suspended solids - no control - does not match limits`

31. 4 types of sedimentation
High pH and cold is bad
Remove viruses and bacteria that slipped through filter
Residual at tap
Discrete - floculation - hindered - compression

32. filtration is the...
Cheap - low biosolids - resistant to shock - simple
OCL
Fixed films
Last chance to remove particles

33. Disadvantages of trickling
Remove as many organic and non organic particles as possible
Low BOD - High suspended solids - no control - does not match limits`
Floating upside down
Remove viruses and bacteria that slipped through filter

34. G
No residual
Remove viruses and bacteria that slipped through filter
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
RMS velocity gradient

35. where is the break point in chlorination and what happens after
The second dip in the graph - free chlorine is formed
Remove viruses and bacteria that slipped through filter
Low BOD - High suspended solids - no control - does not match limits`
Last chance to remove particles

36. Disinfection
Optimal dose depends on charge and concentration
Settling of floculant particles
Cheap - low biosolids - resistant to shock - simple
Remove viruses and bacteria that slipped through filter