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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. Purpose of sedimentation in drinking water
No residual
Remove all flocculated particles
RMS velocity gradient
Add salt

2. Stabilization 3 ways
Chemically - Aerobically - Anaerobically
OCL
High Molecular Weight Synthetics
Discrete - floculation - hindered - compression

3. Advantage of trickling filter
Cheap - low biosolids - resistant to shock - simple
Acts like a sponge - water moves around particles
Remove viruses and bacteria that slipped through filter
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

4. Primary clarifier uses _____ removes _____
Sedimentation - suspended solids
Need enough to make it happen - don't shear the floc though
Optimal dose depends on charge and concentration
Forms clear interface between particles and supernatant( big word) - particles move around the water

5. What is special about chloramine
Always the same dose needed - but that dose is higher
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Low BOD - High suspended solids - no control - does not match limits`
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

6. where is the break point in chlorination and what happens after
Add salt
High Molecular Weight Synthetics
The second dip in the graph - free chlorine is formed
No residual

7. G
Residual at tap
Not in my back yard - nutrient overload - crops
Very pH dependent - grab pieces
RMS velocity gradient

8. Sedimentation
Always the same dose needed - but that dose is higher
Floating upside down
Last chance to remove particles
Particle in a medium - they don't interact with other particles

9. What is the effect of temperature and pH
De watering - belt press and centrifuge
Add salt
High pH and cold is bad
Remove viruses and bacteria that slipped through filter

10. Bridging
High Molecular Weight Synthetics
Low BOD - High suspended solids - no control - does not match limits`
Remove the dead pigs - stuff that would hurt the pumps
Easy/Costly hard to dewater

11. Point of pre treatment
Remove the dead pigs - stuff that would hurt the pumps
Cheap - low biosolids - resistant to shock - simple
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
RMS velocity gradient

12. Higher pH gives more
Easy/Costly hard to dewater
OCL
High Molecular Weight Synthetics
De watering - belt press and centrifuge

13. 4 mechanisms
Low BOD - High suspended solids - no control - does not match limits`
Discrete - floculation - hindered - compression
Chemically - Aerobically - Anaerobically
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

14. Purpose of sedimentation in waste water
Big Partices Catch little ones
Need enough to make it happen - don't shear the floc though
Remove as many organic and non organic particles as possible
De watering - belt press and centrifuge

15. Dichotomy of energy level for floculation

16. Land applicatioin worries
Not in my back yard - nutrient overload - crops
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
Want pH high for corrosion but lower for HOCL

17. Headloss change over time
Remove all flocculated particles
Settling of floculant particles
RMS velocity gradient
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

18. CL catch 22
High pH and cold is bad
Always the same dose needed - but that dose is higher
Want pH high for corrosion but lower for HOCL
Remove viruses and bacteria that slipped through filter

19. Flocuation settling
Big Partices Catch little ones
Forms clear interface between particles and supernatant( big word) - particles move around the water
Settling of floculant particles
De watering - belt press and centrifuge

20. Secondary Clairfier removes _____
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Not in my back yard - nutrient overload - crops
Fixed films
High Molecular Weight Synthetics

21. Enmeshment in Sweep Floc
Remove as many organic and non organic particles as possible
Easy/Costly hard to dewater
Very pH dependent - grab pieces
Residual at tap

22. Goal for drinking water disinfection
Residual at tap
Remove all flocculated particles
Remove as many organic and non organic particles as possible
RMS velocity gradient

23. Compression Settling
Acts like a sponge - water moves around particles
Want pH high for corrosion but lower for HOCL
Forms clear interface between particles and supernatant( big word) - particles move around the water
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

24. Purpose of Floculation
Turn a large number of small particles into a small number of large particles
Residual at tap
Remove as many organic and non organic particles as possible
Big Partices Catch little ones

25. What is thickening - name 2 ways
De watering - belt press and centrifuge
Very pH dependent - grab pieces
Forms clear interface between particles and supernatant( big word) - particles move around the water
Settling of floculant particles

26. Disinfection
Sedimentation - suspended solids
Fixed films
Low BOD - High suspended solids - no control - does not match limits`
Remove viruses and bacteria that slipped through filter

27. Discrete Sedimentation

28. Compress double layer
Remove viruses and bacteria that slipped through filter
Add salt
Fixed films
Low BOD - High suspended solids - no control - does not match limits`

29. Adsorption and Charge Nuetralization
Optimal dose depends on charge and concentration
OCL
Chemically - Aerobically - Anaerobically
Remove as many organic and non organic particles as possible

30. 4 types of sedimentation
Always the same dose needed - but that dose is higher
Discrete - floculation - hindered - compression
Forms clear interface between particles and supernatant( big word) - particles move around the water
Want pH high for corrosion but lower for HOCL

31. filtration is the...
Last chance to remove particles
Acts like a sponge - water moves around particles
Discrete - floculation - hindered - compression
Not in my back yard - nutrient overload - crops

32. Goal for wastewater disinfection
Remove as many organic and non organic particles as possible
Need enough to make it happen - don't shear the floc though
No residual
Big Partices Catch little ones

33. Differential Sedimentatioin
Big Partices Catch little ones
Remove the dead pigs - stuff that would hurt the pumps
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Forms clear interface between particles and supernatant( big word) - particles move around the water

34. Advantage/Disadvantage of Aerobic digestion
High Molecular Weight Synthetics
Chemically - Aerobically - Anaerobically
Optimal dose depends on charge and concentration
Easy/Costly hard to dewater

35. Hinderded Settling
Very pH dependent - grab pieces
Optimal dose depends on charge and concentration
Forms clear interface between particles and supernatant( big word) - particles move around the water
Low BOD - High suspended solids - no control - does not match limits`

36. Disadvantages of trickling
RMS velocity gradient
Low BOD - High suspended solids - no control - does not match limits`
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Acts like a sponge - water moves around particles