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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. Land applicatioin worries
Chemically - Aerobically - Anaerobically
Not in my back yard - nutrient overload - crops
Forms clear interface between particles and supernatant( big word) - particles move around the water
Remove as many organic and non organic particles as possible

2. Sedimentation
Easy/Costly hard to dewater
Floating upside down
Discrete - floculation - hindered - compression
Remove all flocculated particles

3. Compress double layer
Low BOD - High suspended solids - no control - does not match limits`
Add salt
Very pH dependent - grab pieces
Always the same dose needed - but that dose is higher

4. Hinderded Settling
Last chance to remove particles
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
High pH and cold is bad

5. Higher pH gives more
Acts like a sponge - water moves around particles
High pH and cold is bad
Forms clear interface between particles and supernatant( big word) - particles move around the water
OCL

6. 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
No residual
Very pH dependent - grab pieces

7. Goal for drinking water disinfection
Acts like a sponge - water moves around particles
De watering - belt press and centrifuge
High Molecular Weight Synthetics
Residual at tap

8. Dichotomy of energy level for floculation

9. Differential Sedimentatioin
Very pH dependent - grab pieces
Big Partices Catch little ones
Acts like a sponge - water moves around particles
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

10. Discrete Sedimentation

11. What is thickening - name 2 ways
Remove the dead pigs - stuff that would hurt the pumps
Remove all flocculated particles
Fixed films
De watering - belt press and centrifuge

12. where is the break point in chlorination and what happens after
Turn a large number of small particles into a small number of large particles
Need enough to make it happen - don't shear the floc though
The second dip in the graph - free chlorine is formed
No residual

13. Stabilization 3 ways
Chemically - Aerobically - Anaerobically
Particle in a medium - they don't interact with other particles
Floating upside down
Remove all flocculated particles

14. G
Fixed films
Big Partices Catch little ones
Remove viruses and bacteria that slipped through filter
RMS velocity gradient

15. Advantage/Disadvantage of Aerobic digestion
Chemically - Aerobically - Anaerobically
Forms clear interface between particles and supernatant( big word) - particles move around the water
Low BOD - High suspended solids - no control - does not match limits`
Easy/Costly hard to dewater

16. What is the effect of temperature and pH
Easy/Costly hard to dewater
Fixed films
Cheap - low biosolids - resistant to shock - simple
High pH and cold is bad

17. Headloss change over time
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
Remove the dead pigs - stuff that would hurt the pumps
Settling of floculant particles

18. Goal for wastewater disinfection
No residual
Last chance to remove particles
Floating upside down
Particle in a medium - they don't interact with other particles

19. 4 mechanisms
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Optimal dose depends on charge and concentration
Sedimentation - suspended solids
Fixed films

20. Advantage of trickling filter
Easy/Costly hard to dewater
Cheap - low biosolids - resistant to shock - simple
Add salt
De watering - belt press and centrifuge

21. CL catch 22
Forms clear interface between particles and supernatant( big word) - particles move around the water
Always the same dose needed - but that dose is higher
Optimal dose depends on charge and concentration
Want pH high for corrosion but lower for HOCL

22. Compression Settling
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
Remove the dead pigs - stuff that would hurt the pumps
Acts like a sponge - water moves around particles

23. Secondary Clairfier removes _____
Easy/Costly hard to dewater
Floating upside down
Low BOD - High suspended solids - no control - does not match limits`
Fixed films

24. Purpose of sedimentation in drinking water
OCL
The second dip in the graph - free chlorine is formed
Particle in a medium - they don't interact with other particles
Remove all flocculated particles

25. Disinfection
RMS velocity gradient
Remove viruses and bacteria that slipped through filter
Last chance to remove particles
Forms clear interface between particles and supernatant( big word) - particles move around the water

26. 4 types of sedimentation
Not in my back yard - nutrient overload - crops
Always the same dose needed - but that dose is higher
Remove all flocculated particles
Discrete - floculation - hindered - compression

27. Bridging
Settling of floculant particles
Last chance to remove particles
High Molecular Weight Synthetics
Not in my back yard - nutrient overload - crops

28. Purpose of Floculation
Fixed films
Optimal dose depends on charge and concentration
Discrete - floculation - hindered - compression
Turn a large number of small particles into a small number of large particles

29. Disadvantages of trickling
Floating upside down
Easy/Costly hard to dewater
Optimal dose depends on charge and concentration
Low BOD - High suspended solids - no control - does not match limits`

30. Adsorption and Charge Nuetralization
Forms clear interface between particles and supernatant( big word) - particles move around the water
Optimal dose depends on charge and concentration
Low BOD - High suspended solids - no control - does not match limits`
RMS velocity gradient

31. Enmeshment in Sweep Floc
OCL
Very pH dependent - grab pieces
Always the same dose needed - but that dose is higher
Add salt

32. filtration is the...
De watering - belt press and centrifuge
Turn a large number of small particles into a small number of large particles
Remove as many organic and non organic particles as possible
Last chance to remove particles

33. Primary clarifier uses _____ removes _____
The second dip in the graph - free chlorine is formed
Sedimentation - suspended solids
Floating upside down
De watering - belt press and centrifuge

34. Flocuation settling
Settling of floculant particles
RMS velocity gradient
Residual at tap
Forms clear interface between particles and supernatant( big word) - particles move around the water

35. Point of pre treatment
Chemically - Aerobically - Anaerobically
Residual at tap
Turn a large number of small particles into a small number of large particles
Remove the dead pigs - stuff that would hurt the pumps

36. What is special about chloramine
Add salt
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
Not in my back yard - nutrient overload - crops