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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. 4 types of sedimentation
Big Partices Catch little ones
Acts like a sponge - water moves around particles
Remove all flocculated particles
Discrete - floculation - hindered - compression

2. Compress double layer
High Molecular Weight Synthetics
Turn a large number of small particles into a small number of large particles
Particle in a medium - they don't interact with other particles
Add salt

3. Higher pH gives more
Big Partices Catch little ones
OCL
Remove as many organic and non organic particles as possible
High pH and cold is bad

4. Goal for drinking water disinfection
Easy/Costly hard to dewater
Residual at tap
Turn a large number of small particles into a small number of large particles
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

5. Stabilization 3 ways
High pH and cold is bad
Chemically - Aerobically - Anaerobically
Want pH high for corrosion but lower for HOCL
RMS velocity gradient

6. What is special about chloramine
Fixed films
Remove viruses and bacteria that slipped through filter
Always the same dose needed - but that dose is higher
No residual

7. Disinfection
Remove viruses and bacteria that slipped through filter
High pH and cold is bad
De watering - belt press and centrifuge
Very pH dependent - grab pieces

8. Sedimentation
Floating upside down
Remove the dead pigs - stuff that would hurt the pumps
Chemically - Aerobically - Anaerobically
Add salt

9. Goal for wastewater disinfection
Chemically - Aerobically - Anaerobically
Last chance to remove particles
No residual
Big Partices Catch little ones

10. Purpose of Floculation
Big Partices Catch little ones
Cheap - low biosolids - resistant to shock - simple
Always the same dose needed - but that dose is higher
Turn a large number of small particles into a small number of large particles

11. Adsorption and Charge Nuetralization
Turn a large number of small particles into a small number of large particles
Optimal dose depends on charge and concentration
Not in my back yard - nutrient overload - crops
Very pH dependent - grab pieces

12. Land applicatioin worries
Remove the dead pigs - stuff that would hurt the pumps
Add salt
Not in my back yard - nutrient overload - crops
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

13. 4 mechanisms
Need enough to make it happen - don't shear the floc though
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Floating upside down
High Molecular Weight Synthetics

14. Enmeshment in Sweep Floc
High Molecular Weight Synthetics
Very pH dependent - grab pieces
No residual
Acts like a sponge - water moves around particles

15. Flocuation settling
OCL
Cheap - low biosolids - resistant to shock - simple
Not in my back yard - nutrient overload - crops
Settling of floculant particles

16. filtration is the...
Particle in a medium - they don't interact with other particles
Last chance to remove particles
Want pH high for corrosion but lower for HOCL
Need enough to make it happen - don't shear the floc though

17. Purpose of sedimentation in drinking water
Remove all flocculated particles
Residual at tap
Settling of floculant particles
Particle in a medium - they don't interact with other particles

18. Differential Sedimentatioin
Forms clear interface between particles and supernatant( big word) - particles move around the water
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
Big Partices Catch little ones

19. Purpose of sedimentation in waste water
Need enough to make it happen - don't shear the floc though
Remove as many organic and non organic particles as possible
RMS velocity gradient
Floating upside down

20. Secondary Clairfier removes _____
Want pH high for corrosion but lower for HOCL
Fixed films
Residual at tap
RMS velocity gradient

21. Disadvantages of trickling
Remove viruses and bacteria that slipped through filter
Low BOD - High suspended solids - no control - does not match limits`
No residual
Always the same dose needed - but that dose is higher

22. Dichotomy of energy level for floculation

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23. Advantage/Disadvantage of Aerobic digestion
Easy/Costly hard to dewater
Optimal dose depends on charge and concentration
High pH and cold is bad
Discrete - floculation - hindered - compression

24. Point of pre treatment
OCL
Remove the dead pigs - stuff that would hurt the pumps
Residual at tap
Easy/Costly hard to dewater

25. Advantage of trickling filter
High Molecular Weight Synthetics
Not in my back yard - nutrient overload - crops
No residual
Cheap - low biosolids - resistant to shock - simple

26. Bridging
High Molecular Weight Synthetics
Fixed films
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Easy/Costly hard to dewater

27. Primary clarifier uses _____ removes _____
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Sedimentation - suspended solids
OCL
Remove the dead pigs - stuff that would hurt the pumps

28. where is the break point in chlorination and what happens after
The second dip in the graph - free chlorine is formed
Turn a large number of small particles into a small number of large particles
Particle in a medium - they don't interact with other particles
Acts like a sponge - water moves around particles

29. Discrete Sedimentation

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30. What is the effect of temperature and pH
Optimal dose depends on charge and concentration
Discrete - floculation - hindered - compression
Fixed films
High pH and cold is bad

31. Compression Settling
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
Acts like a sponge - water moves around particles
Need enough to make it happen - don't shear the floc though

32. CL catch 22
Need enough to make it happen - don't shear the floc though
Want pH high for corrosion but lower for HOCL
Big Partices Catch little ones
High pH and cold is bad

33. Hinderded Settling
Forms clear interface between particles and supernatant( big word) - particles move around the water
Acts like a sponge - water moves around particles
Remove the dead pigs - stuff that would hurt the pumps
De watering - belt press and centrifuge

34. What is thickening - name 2 ways
Acts like a sponge - water moves around particles
De watering - belt press and centrifuge
Last chance to remove particles
Not in my back yard - nutrient overload - crops

35. G
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
RMS velocity gradient
Very pH dependent - grab pieces

36. Headloss change over time
Chemically - Aerobically - Anaerobically
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Turn a large number of small particles into a small number of large particles
Floating upside down