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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 Floculation
Turn a large number of small particles into a small number of large particles
Floating upside down
Settling of floculant particles
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

2. Purpose of sedimentation in waste water
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
Turn a large number of small particles into a small number of large particles
Fixed films

3. What is the effect of temperature and pH
Turn a large number of small particles into a small number of large particles
Discrete - floculation - hindered - compression
Always the same dose needed - but that dose is higher
High pH and cold is bad

4. Enmeshment in Sweep Floc
Sedimentation - suspended solids
Very pH dependent - grab pieces
Cheap - low biosolids - resistant to shock - simple
Last chance to remove particles

5. Advantage/Disadvantage of Aerobic digestion
Optimal dose depends on charge and concentration
RMS velocity gradient
Particle in a medium - they don't interact with other particles
Easy/Costly hard to dewater

6. Advantage of trickling filter
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
Big Partices Catch little ones
Cheap - low biosolids - resistant to shock - simple

7. Bridging
Fixed films
High pH and cold is bad
High Molecular Weight Synthetics
Turn a large number of small particles into a small number of large particles

8. Sedimentation
Always the same dose needed - but that dose is higher
Floating upside down
Remove as many organic and non organic particles as possible
Last chance to remove particles

9. Higher pH gives more
Want pH high for corrosion but lower for HOCL
RMS velocity gradient
Low BOD - High suspended solids - no control - does not match limits`
OCL

10. filtration is the...
De watering - belt press and centrifuge
Add salt
Fixed films
Last chance to remove particles

11. What is thickening - name 2 ways
Remove viruses and bacteria that slipped through filter
Acts like a sponge - water moves around particles
Turn a large number of small particles into a small number of large particles
De watering - belt press and centrifuge

12. Secondary Clairfier removes _____
Fixed films
Always the same dose needed - but that dose is higher
Chemically - Aerobically - Anaerobically
Forms clear interface between particles and supernatant( big word) - particles move around the water

13. Headloss change over time
Sedimentation - suspended solids
Low BOD - High suspended solids - no control - does not match limits`
Settling of floculant particles
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

14. Disinfection
Settling of floculant particles
Remove viruses and bacteria that slipped through filter
Fixed films
Sedimentation - suspended solids

15. Purpose of sedimentation in drinking water
The second dip in the graph - free chlorine is formed
Remove all flocculated particles
Remove as many organic and non organic particles as possible
No residual

16. CL catch 22
Very pH dependent - grab pieces
The second dip in the graph - free chlorine is formed
Want pH high for corrosion but lower for HOCL
Turn a large number of small particles into a small number of large particles

17. 4 types of sedimentation
Need enough to make it happen - don't shear the floc though
Sedimentation - suspended solids
Discrete - floculation - hindered - compression
Not in my back yard - nutrient overload - crops

18. Goal for wastewater disinfection
Last chance to remove particles
No residual
Residual at tap
Easy/Costly hard to dewater

19. Compression Settling
Chemically - Aerobically - Anaerobically
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

20. Flocuation settling
Settling of floculant particles
OCL
Low BOD - High suspended solids - no control - does not match limits`
Discrete - floculation - hindered - compression

21. where is the break point in chlorination and what happens after
Acts like a sponge - water moves around particles
Cheap - low biosolids - resistant to shock - simple
The second dip in the graph - free chlorine is formed
OCL

22. Discrete Sedimentation

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23. Goal for drinking water disinfection
Remove as many organic and non organic particles as possible
Always the same dose needed - but that dose is higher
RMS velocity gradient
Residual at tap

24. Adsorption and Charge Nuetralization
Optimal dose depends on charge and concentration
Remove the dead pigs - stuff that would hurt the pumps
Discrete - floculation - hindered - compression
Big Partices Catch little ones

25. Point of pre treatment
The second dip in the graph - free chlorine is formed
Remove the dead pigs - stuff that would hurt the pumps
Residual at tap
No residual

26. Differential Sedimentatioin
Need enough to make it happen - don't shear the floc though
Big Partices Catch little ones
Optimal dose depends on charge and concentration
Discrete - floculation - hindered - compression

27. Stabilization 3 ways
RMS velocity gradient
Acts like a sponge - water moves around particles
Remove viruses and bacteria that slipped through filter
Chemically - Aerobically - Anaerobically

28. Disadvantages of trickling
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Remove the dead pigs - stuff that would hurt the pumps
Low BOD - High suspended solids - no control - does not match limits`
Turn a large number of small particles into a small number of large particles

29. 4 mechanisms
De watering - belt press and centrifuge
Last chance to remove particles
Chemically - Aerobically - Anaerobically
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

30. Compress double layer
Sedimentation - suspended solids
No residual
Easy/Costly hard to dewater
Add salt

31. Dichotomy of energy level for floculation

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32. Hinderded Settling
Discrete - floculation - hindered - compression
Forms clear interface between particles and supernatant( big word) - particles move around the water
De watering - belt press and centrifuge
High Molecular Weight Synthetics

33. What is special about chloramine
Need enough to make it happen - don't shear the floc though
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
High pH and cold is bad

34. Land applicatioin worries
Not in my back yard - nutrient overload - crops
Want pH high for corrosion but lower for HOCL
High Molecular Weight Synthetics
Cheap - low biosolids - resistant to shock - simple

35. Primary clarifier uses _____ removes _____
Remove the dead pigs - stuff that would hurt the pumps
Settling of floculant particles
Floating upside down
Sedimentation - suspended solids

36. G
Not in my back yard - nutrient overload - crops
Remove all flocculated particles
Remove the dead pigs - stuff that would hurt the pumps
RMS velocity gradient