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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 of trickling filter
Discrete - floculation - hindered - compression
Cheap - low biosolids - resistant to shock - simple
High Molecular Weight Synthetics
Always the same dose needed - but that dose is higher

2. Higher pH gives more
Remove the dead pigs - stuff that would hurt the pumps
Forms clear interface between particles and supernatant( big word) - particles move around the water
OCL
Easy/Costly hard to dewater

3. Adsorption and Charge Nuetralization
Particle in a medium - they don't interact with other particles
Remove viruses and bacteria that slipped through filter
Optimal dose depends on charge and concentration
Remove as many organic and non organic particles as possible

4. Compress double layer
Add salt
Forms clear interface between particles and supernatant( big word) - particles move around the water
Residual at tap
Settling of floculant particles

5. Purpose of Floculation
Need enough to make it happen - don't shear the floc though
Turn a large number of small particles into a small number of large particles
RMS velocity gradient
Want pH high for corrosion but lower for HOCL

6. Primary clarifier uses _____ removes _____
The second dip in the graph - free chlorine is formed
Sedimentation - suspended solids
Add salt
Settling of floculant particles

7. Enmeshment in Sweep Floc
Very pH dependent - grab pieces
Optimal dose depends on charge and concentration
High Molecular Weight Synthetics
Big Partices Catch little ones

8. Goal for wastewater disinfection
No residual
High pH and cold is bad
Discrete - floculation - hindered - compression
Settling of floculant particles

9. Land applicatioin worries
Not in my back yard - nutrient overload - crops
Want pH high for corrosion but lower for HOCL
Chemically - Aerobically - Anaerobically
Last chance to remove particles

10. Purpose of sedimentation in drinking water
OCL
Very pH dependent - grab pieces
Remove all flocculated particles
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

11. Advantage/Disadvantage of Aerobic digestion
Remove viruses and bacteria that slipped through filter
Optimal dose depends on charge and concentration
Remove all flocculated particles
Easy/Costly hard to dewater

12. Purpose of sedimentation in waste water
Remove viruses and bacteria that slipped through filter
Remove all flocculated particles
High Molecular Weight Synthetics
Remove as many organic and non organic particles as possible

13. Disinfection
Sedimentation - suspended solids
Chemically - Aerobically - Anaerobically
Optimal dose depends on charge and concentration
Remove viruses and bacteria that slipped through filter

14. What is special about chloramine
Always the same dose needed - but that dose is higher
Particle in a medium - they don't interact with other particles
The second dip in the graph - free chlorine is formed
Optimal dose depends on charge and concentration

15. Bridging
Remove the dead pigs - stuff that would hurt the pumps
High Molecular Weight Synthetics
High pH and cold is bad
Low BOD - High suspended solids - no control - does not match limits`

16. where is the break point in chlorination and what happens after
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
The second dip in the graph - free chlorine is formed
Optimal dose depends on charge and concentration
Easy/Costly hard to dewater

17. 4 mechanisms
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Particle in a medium - they don't interact with other particles
Sedimentation - suspended solids
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

18. Disadvantages of trickling
Optimal dose depends on charge and concentration
Settling of floculant particles
Low BOD - High suspended solids - no control - does not match limits`
De watering - belt press and centrifuge

19. Discrete Sedimentation

20. What is thickening - name 2 ways
Need enough to make it happen - don't shear the floc though
Want pH high for corrosion but lower for HOCL
Discrete - floculation - hindered - compression
De watering - belt press and centrifuge

21. Stabilization 3 ways
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Chemically - Aerobically - Anaerobically
Not in my back yard - nutrient overload - crops
Always the same dose needed - but that dose is higher

22. Goal for drinking water disinfection
Easy/Costly hard to dewater
Residual at tap
Optimal dose depends on charge and concentration
Cheap - low biosolids - resistant to shock - simple

23. Headloss change over time
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
Remove as many organic and non organic particles as possible
Always the same dose needed - but that dose is higher

24. Compression Settling
Floating upside down
Acts like a sponge - water moves around particles
Add salt
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

25. Sedimentation
Remove all flocculated particles
Remove viruses and bacteria that slipped through filter
Floating upside down
Always the same dose needed - but that dose is higher

26. G
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Always the same dose needed - but that dose is higher
RMS velocity gradient
Optimal dose depends on charge and concentration

27. What is the effect of temperature and pH
High pH and cold is bad
RMS velocity gradient
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Need enough to make it happen - don't shear the floc though

28. Dichotomy of energy level for floculation

29. Secondary Clairfier removes _____
Remove as many organic and non organic particles as possible
Add salt
Fixed films
Acts like a sponge - water moves around particles

30. Hinderded Settling
No residual
Settling of floculant particles
High Molecular Weight Synthetics
Forms clear interface between particles and supernatant( big word) - particles move around the water

31. Point of pre treatment
Discrete - floculation - hindered - compression
Cheap - low biosolids - resistant to shock - simple
High Molecular Weight Synthetics
Remove the dead pigs - stuff that would hurt the pumps

32. Differential Sedimentatioin
RMS velocity gradient
Big Partices Catch little ones
Want pH high for corrosion but lower for HOCL
Remove viruses and bacteria that slipped through filter

33. Flocuation settling
Settling of floculant particles
Want pH high for corrosion but lower for HOCL
Always the same dose needed - but that dose is higher
Discrete - floculation - hindered - compression

34. 4 types of sedimentation
Remove the dead pigs - stuff that would hurt the pumps
Big Partices Catch little ones
Discrete - floculation - hindered - compression
Remove as many organic and non organic particles as possible

35. filtration is the...
Acts like a sponge - water moves around particles
Turn a large number of small particles into a small number of large particles
Last chance to remove particles
Remove as many organic and non organic particles as possible

36. CL catch 22
Settling of floculant particles
No residual
High pH and cold is bad
Want pH high for corrosion but lower for HOCL