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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
Cheap - low biosolids - resistant to shock - simple
Fixed films
Turn a large number of small particles into a small number of large particles
RMS velocity gradient

2. Point of pre treatment
Remove the dead pigs - stuff that would hurt the pumps
Need enough to make it happen - don't shear the floc though
Fixed films
Floating upside down

3. Differential Sedimentatioin
Chemically - Aerobically - Anaerobically
Big Partices Catch little ones
Residual at tap
Very pH dependent - grab pieces

4. Stabilization 3 ways
Chemically - Aerobically - Anaerobically
Forms clear interface between particles and supernatant( big word) - particles move around the water
Remove viruses and bacteria that slipped through filter
Settling of floculant particles

5. Discrete Sedimentation

6. 4 types of sedimentation
Cheap - low biosolids - resistant to shock - simple
Chemically - Aerobically - Anaerobically
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Discrete - floculation - hindered - compression

7. What is thickening - name 2 ways
Want pH high for corrosion but lower for HOCL
De watering - belt press and centrifuge
Residual at tap
Settling of floculant particles

8. Flocuation settling
Settling of floculant particles
Turn a large number of small particles into a small number of large particles
Remove viruses and bacteria that slipped through filter
Forms clear interface between particles and supernatant( big word) - particles move around the water

9. Advantage/Disadvantage of Aerobic digestion
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Easy/Costly hard to dewater
Residual at tap
Discrete - floculation - hindered - compression

10. Purpose of sedimentation in waste water
Low BOD - High suspended solids - no control - does not match limits`
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

11. Disinfection
Remove the dead pigs - stuff that would hurt the pumps
Chemically - Aerobically - Anaerobically
Fixed films
Remove viruses and bacteria that slipped through filter

12. Compress double layer
Chemically - Aerobically - Anaerobically
Not in my back yard - nutrient overload - crops
Add salt
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

13. Goal for wastewater disinfection
Forms clear interface between particles and supernatant( big word) - particles move around the water
De watering - belt press and centrifuge
Residual at tap
No residual

14. Purpose of sedimentation in drinking water
Remove all flocculated particles
Cheap - low biosolids - resistant to shock - simple
Remove as many organic and non organic particles as possible
Not in my back yard - nutrient overload - crops

15. Goal for drinking water disinfection
Residual at tap
Optimal dose depends on charge and concentration
Easy/Costly hard to dewater
Forms clear interface between particles and supernatant( big word) - particles move around the water

16. Enmeshment in Sweep Floc
Want pH high for corrosion but lower for HOCL
RMS velocity gradient
Very pH dependent - grab pieces
Sedimentation - suspended solids

17. Primary clarifier uses _____ removes _____
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Fixed films
Sedimentation - suspended solids
Easy/Costly hard to dewater

18. Disadvantages of trickling
De watering - belt press and centrifuge
Remove all flocculated particles
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

19. Dichotomy of energy level for floculation

20. Bridging
Not in my back yard - nutrient overload - crops
The second dip in the graph - free chlorine is formed
High Molecular Weight Synthetics
Fixed films

21. Sedimentation
Floating upside down
Want pH high for corrosion but lower for HOCL
Big Partices Catch little ones
Add salt

22. Higher pH gives more
No residual
Very pH dependent - grab pieces
OCL
Remove as many organic and non organic particles as possible

23. What is special about chloramine
The second dip in the graph - free chlorine is formed
Chemically - Aerobically - Anaerobically
Always the same dose needed - but that dose is higher
Turn a large number of small particles into a small number of large particles

24. 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
RMS velocity gradient
OCL
Cheap - low biosolids - resistant to shock - simple

25. Hinderded Settling
Settling of floculant particles
Forms clear interface between particles and supernatant( big word) - particles move around the water
Turn a large number of small particles into a small number of large particles
RMS velocity gradient

26. Land applicatioin worries
Discrete - floculation - hindered - compression
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

27. Compression Settling
Big Partices Catch little ones
Discrete - floculation - hindered - compression
Need enough to make it happen - don't shear the floc though
Acts like a sponge - water moves around particles

28. What is the effect of temperature and pH
Need enough to make it happen - don't shear the floc though
High pH and cold is bad
Not in my back yard - nutrient overload - crops
Big Partices Catch little ones

29. Adsorption and Charge Nuetralization
Optimal dose depends on charge and concentration
Remove the dead pigs - stuff that would hurt the pumps
Low BOD - High suspended solids - no control - does not match limits`
Cheap - low biosolids - resistant to shock - simple

30. filtration is the...
De watering - belt press and centrifuge
Need enough to make it happen - don't shear the floc though
High pH and cold is bad
Last chance to remove particles

31. CL catch 22
Chemically - Aerobically - Anaerobically
Residual at tap
Want pH high for corrosion but lower for HOCL
High Molecular Weight Synthetics

32. 4 mechanisms
De watering - belt press and centrifuge
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Chemically - Aerobically - Anaerobically
Need enough to make it happen - don't shear the floc though

33. G
Add salt
De watering - belt press and centrifuge
Remove viruses and bacteria that slipped through filter
RMS velocity gradient

34. where is the break point in chlorination and what happens after
The second dip in the graph - free chlorine is formed
Big Partices Catch little ones
No residual
High pH and cold is bad

35. Headloss change over time
Easy/Costly hard to dewater
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
Floating upside down

36. Secondary Clairfier removes _____
No residual
Easy/Costly hard to dewater
Fixed films
Settling of floculant particles