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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. Stabilization 3 ways
Discrete - floculation - hindered - compression
Acts like a sponge - water moves around particles
Chemically - Aerobically - Anaerobically
Very pH dependent - grab pieces

2. Goal for drinking water disinfection
Turn a large number of small particles into a small number of large particles
Residual at tap
Easy/Costly hard to dewater
De watering - belt press and centrifuge

3. Sedimentation
Remove as many organic and non organic particles as possible
Floating upside down
Very pH dependent - grab pieces
Remove viruses and bacteria that slipped through filter

4. Land applicatioin worries
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Remove the dead pigs - stuff that would hurt the pumps
Not in my back yard - nutrient overload - crops
Remove viruses and bacteria that slipped through filter

5. Point of pre treatment
High pH and cold is bad
Not in my back yard - nutrient overload - crops
Always the same dose needed - but that dose is higher
Remove the dead pigs - stuff that would hurt the pumps

6. Compress double layer
Add salt
Last chance to remove particles
Remove as many organic and non organic particles as possible
Residual at tap

7. Primary clarifier uses _____ removes _____
Fixed films
Remove as many organic and non organic particles as possible
Sedimentation - suspended solids
High Molecular Weight Synthetics

8. What is special about chloramine
Last chance to remove particles
Always the same dose needed - but that dose is higher
No residual
Settling of floculant particles

9. Advantage of trickling filter
Last chance to remove particles
Always the same dose needed - but that dose is higher
Remove as many organic and non organic particles as possible
Cheap - low biosolids - resistant to shock - simple

10. Flocuation settling
Floating upside down
No residual
Settling of floculant particles
De watering - belt press and centrifuge

11. Headloss change over time
Cheap - low biosolids - resistant to shock - simple
Need enough to make it happen - don't shear the floc though
Chemically - Aerobically - Anaerobically
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

12. Disinfection
Not in my back yard - nutrient overload - crops
Settling of floculant particles
Remove viruses and bacteria that slipped through filter
Want pH high for corrosion but lower for HOCL

13. Purpose of sedimentation in waste water
Remove as many organic and non organic particles as possible
Optimal dose depends on charge and concentration
Discrete - floculation - hindered - compression
The second dip in the graph - free chlorine is formed

14. 4 types of sedimentation
No residual
High pH and cold is bad
Very pH dependent - grab pieces
Discrete - floculation - hindered - compression

15. Compression Settling
Remove viruses and bacteria that slipped through filter
Acts like a sponge - water moves around particles
Last chance to remove particles
Fixed films

16. Adsorption and Charge Nuetralization
Residual at tap
Forms clear interface between particles and supernatant( big word) - particles move around the water
Easy/Costly hard to dewater
Optimal dose depends on charge and concentration

17. Enmeshment in Sweep Floc
Chemically - Aerobically - Anaerobically
Very pH dependent - grab pieces
Cheap - low biosolids - resistant to shock - simple
Floating upside down

18. Hinderded Settling
Easy/Costly hard to dewater
Forms clear interface between particles and supernatant( big word) - particles move around the water
Cheap - low biosolids - resistant to shock - simple
Sedimentation - suspended solids

19. What is the effect of temperature and pH
Residual at tap
High pH and cold is bad
RMS velocity gradient
Very pH dependent - grab pieces

20. CL catch 22
Turn a large number of small particles into a small number of large particles
Last chance to remove particles
Want pH high for corrosion but lower for HOCL
Remove the dead pigs - stuff that would hurt the pumps

21. Differential Sedimentatioin
RMS velocity gradient
Residual at tap
The second dip in the graph - free chlorine is formed
Big Partices Catch little ones

22. 4 mechanisms
Acts like a sponge - water moves around particles
Chemically - Aerobically - Anaerobically
Remove the dead pigs - stuff that would hurt the pumps
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

23. Disadvantages of trickling
Add salt
De watering - belt press and centrifuge
Low BOD - High suspended solids - no control - does not match limits`
The second dip in the graph - free chlorine is formed

24. Advantage/Disadvantage of Aerobic digestion
Fixed films
Forms clear interface between particles and supernatant( big word) - particles move around the water
Always the same dose needed - but that dose is higher
Easy/Costly hard to dewater

25. Secondary Clairfier removes _____
Add salt
RMS velocity gradient
Fixed films
Big Partices Catch little ones

26. Discrete Sedimentation

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27. Purpose of Floculation
Always the same dose needed - but that dose is higher
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
High pH and cold is bad

28. Dichotomy of energy level for floculation

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29. Higher pH gives more
De watering - belt press and centrifuge
Need enough to make it happen - don't shear the floc though
Cheap - low biosolids - resistant to shock - simple
OCL

30. filtration is the...
Turn a large number of small particles into a small number of large particles
Always the same dose needed - but that dose is higher
Last chance to remove particles
Discrete - floculation - hindered - compression

31. where is the break point in chlorination and what happens after
Remove viruses and bacteria that slipped through filter
The second dip in the graph - free chlorine is formed
Big Partices Catch little ones
Remove all flocculated particles

32. G
Optimal dose depends on charge and concentration
Remove the dead pigs - stuff that would hurt the pumps
RMS velocity gradient
Remove as many organic and non organic particles as possible

33. Purpose of sedimentation in drinking water
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Residual at tap
Remove all flocculated particles
Acts like a sponge - water moves around particles

34. Goal for wastewater disinfection
Very pH dependent - grab pieces
Remove the dead pigs - stuff that would hurt the pumps
No residual
RMS velocity gradient

35. Bridging
Very pH dependent - grab pieces
OCL
Cheap - low biosolids - resistant to shock - simple
High Molecular Weight Synthetics

36. What is thickening - name 2 ways
De watering - belt press and centrifuge
Remove viruses and bacteria that slipped through filter
Cheap - low biosolids - resistant to shock - simple
Acts like a sponge - water moves around particles