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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
Easy/Costly hard to dewater
Floating upside down
Discrete - floculation - hindered - compression
Particle in a medium - they don't interact with other particles

2. Goal for drinking water disinfection
Add salt
Residual at tap
Last chance to remove particles
Acts like a sponge - water moves around particles

3. CL catch 22
High Molecular Weight Synthetics
Forms clear interface between particles and supernatant( big word) - particles move around the water
Need enough to make it happen - don't shear the floc though
Want pH high for corrosion but lower for HOCL

4. Disinfection
Remove viruses and bacteria that slipped through filter
RMS velocity gradient
Floating upside down
Remove as many organic and non organic particles as possible

5. Sedimentation
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Floating upside down
Optimal dose depends on charge and concentration
OCL

6. Advantage/Disadvantage of Aerobic digestion
Discrete - floculation - hindered - compression
Easy/Costly hard to dewater
Settling of floculant particles
Add salt

7. Discrete Sedimentation

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8. Adsorption and Charge Nuetralization
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
RMS velocity gradient
Optimal dose depends on charge and concentration
Not in my back yard - nutrient overload - crops

9. where is the break point in chlorination and what happens after
Floating upside down
Cheap - low biosolids - resistant to shock - simple
Chemically - Aerobically - Anaerobically
The second dip in the graph - free chlorine is formed

10. Hinderded Settling
Remove viruses and bacteria that slipped through filter
Forms clear interface between particles and supernatant( big word) - particles move around the water
Very pH dependent - grab pieces
Easy/Costly hard to dewater

11. G
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
RMS velocity gradient
Easy/Costly hard to dewater
Particle in a medium - they don't interact with other particles

12. Land applicatioin worries
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Not in my back yard - nutrient overload - crops
High Molecular Weight Synthetics
Residual at tap

13. Secondary Clairfier removes _____
Very pH dependent - grab pieces
De watering - belt press and centrifuge
Want pH high for corrosion but lower for HOCL
Fixed films

14. filtration is the...
Optimal dose depends on charge and concentration
Always the same dose needed - but that dose is higher
Last chance to remove particles
Add salt

15. Bridging
Fixed films
High Molecular Weight Synthetics
Particle in a medium - they don't interact with other particles
Discrete - floculation - hindered - compression

16. Goal for wastewater disinfection
No residual
Remove the dead pigs - stuff that would hurt the pumps
Forms clear interface between particles and supernatant( big word) - particles move around the water
Cheap - low biosolids - resistant to shock - simple

17. Stabilization 3 ways
Turn a large number of small particles into a small number of large particles
Always the same dose needed - but that dose is higher
Chemically - Aerobically - Anaerobically
Remove all flocculated particles

18. Differential Sedimentatioin
Settling of floculant particles
Floating upside down
Remove the dead pigs - stuff that would hurt the pumps
Big Partices Catch little ones

19. Compress double layer
No residual
Add salt
Fixed films
Turn a large number of small particles into a small number of large particles

20. Higher pH gives more
Remove the dead pigs - stuff that would hurt the pumps
Always the same dose needed - but that dose is higher
OCL
Sedimentation - suspended solids

21. Point of pre treatment
Discrete - floculation - hindered - compression
RMS velocity gradient
Remove the dead pigs - stuff that would hurt the pumps
Forms clear interface between particles and supernatant( big word) - particles move around the water

22. Advantage of trickling filter
Cheap - low biosolids - resistant to shock - simple
Particle in a medium - they don't interact with other particles
Very pH dependent - grab pieces
Acts like a sponge - water moves around particles

23. Dichotomy of energy level for floculation

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24. 4 mechanisms
Always the same dose needed - but that dose is higher
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
Optimal dose depends on charge and concentration

25. Disadvantages of trickling
Low BOD - High suspended solids - no control - does not match limits`
Fixed films
Easy/Costly hard to dewater
Cheap - low biosolids - resistant to shock - simple

26. What is thickening - name 2 ways
Remove the dead pigs - stuff that would hurt the pumps
Want pH high for corrosion but lower for HOCL
De watering - belt press and centrifuge
OCL

27. Purpose of sedimentation in waste water
Need enough to make it happen - don't shear the floc though
Sedimentation - suspended solids
Remove as many organic and non organic particles as possible
Remove viruses and bacteria that slipped through filter

28. Flocuation settling
Settling of floculant particles
Optimal dose depends on charge and concentration
De watering - belt press and centrifuge
Last chance to remove particles

29. Compression Settling
Remove viruses and bacteria that slipped through filter
Remove the dead pigs - stuff that would hurt the pumps
Acts like a sponge - water moves around particles
Discrete - floculation - hindered - compression

30. Enmeshment in Sweep Floc
Very pH dependent - grab pieces
Floating upside down
Residual at tap
Discrete - floculation - hindered - compression

31. Purpose of sedimentation in drinking water
Cheap - low biosolids - resistant to shock - simple
Always the same dose needed - but that dose is higher
Want pH high for corrosion but lower for HOCL
Remove all flocculated particles

32. What is special about chloramine
Very pH dependent - grab pieces
Settling of floculant particles
Always the same dose needed - but that dose is higher
Need enough to make it happen - don't shear the floc though

33. Purpose of Floculation
High Molecular Weight Synthetics
Floating upside down
Turn a large number of small particles into a small number of large particles
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

34. What is the effect of temperature and pH
Want pH high for corrosion but lower for HOCL
Add salt
High pH and cold is bad
OCL

35. Primary clarifier uses _____ removes _____
Low BOD - High suspended solids - no control - does not match limits`
Remove viruses and bacteria that slipped through filter
Big Partices Catch little ones
Sedimentation - suspended solids

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
Always the same dose needed - but that dose is higher
Particle in a medium - they don't interact with other particles