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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. filtration is the...
Not in my back yard - nutrient overload - crops
Last chance to remove particles
Add salt
No residual

2. where is the break point in chlorination and what happens after
Cheap - low biosolids - resistant to shock - simple
The second dip in the graph - free chlorine is formed
Forms clear interface between particles and supernatant( big word) - particles move around the water
Remove all flocculated particles

3. Stabilization 3 ways
The second dip in the graph - free chlorine is formed
Low BOD - High suspended solids - no control - does not match limits`
Chemically - Aerobically - Anaerobically
OCL

4. What is the effect of temperature and pH
Remove as many organic and non organic particles as possible
Remove the dead pigs - stuff that would hurt the pumps
High pH and cold is bad
OCL

5. Secondary Clairfier removes _____
Sedimentation - suspended solids
High Molecular Weight Synthetics
Fixed films
Settling of floculant particles

6. Compression Settling
De watering - belt press and centrifuge
Want pH high for corrosion but lower for HOCL
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Acts like a sponge - water moves around particles

7. G
Discrete - floculation - hindered - compression
Last chance to remove particles
Want pH high for corrosion but lower for HOCL
RMS velocity gradient

8. Flocuation settling
Always the same dose needed - but that dose is higher
Discrete - floculation - hindered - compression
Big Partices Catch little ones
Settling of floculant particles

9. Enmeshment in Sweep Floc
Optimal dose depends on charge and concentration
Very pH dependent - grab pieces
Acts like a sponge - water moves around particles
Forms clear interface between particles and supernatant( big word) - particles move around the water

10. Purpose of sedimentation in drinking water
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
Remove all flocculated particles
Easy/Costly hard to dewater

11. Differential Sedimentatioin
Need enough to make it happen - don't shear the floc though
Sedimentation - suspended solids
Big Partices Catch little ones
Always the same dose needed - but that dose is higher

12. Goal for drinking water disinfection
Acts like a sponge - water moves around particles
Residual at tap
Fixed films
Floating upside down

13. Adsorption and Charge Nuetralization
Low BOD - High suspended solids - no control - does not match limits`
High Molecular Weight Synthetics
Remove as many organic and non organic particles as possible
Optimal dose depends on charge and concentration

14. Purpose of Floculation
Settling of floculant particles
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
Turn a large number of small particles into a small number of large particles

15. Higher pH gives more
Forms clear interface between particles and supernatant( big word) - particles move around the water
Big Partices Catch little ones
Not in my back yard - nutrient overload - crops
OCL

16. Dichotomy of energy level for floculation

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17. Bridging
Very pH dependent - grab pieces
High Molecular Weight Synthetics
Add salt
RMS velocity gradient

18. Point of pre treatment
Sedimentation - suspended solids
Remove the dead pigs - stuff that would hurt the pumps
OCL
De watering - belt press and centrifuge

19. Primary clarifier uses _____ removes _____
Remove viruses and bacteria that slipped through filter
Forms clear interface between particles and supernatant( big word) - particles move around the water
Residual at tap
Sedimentation - suspended solids

20. Disadvantages of trickling
Low BOD - High suspended solids - no control - does not match limits`
Need enough to make it happen - don't shear the floc though
No residual
Easy/Costly hard to dewater

21. Headloss change over time
Last chance to remove particles
Remove all flocculated particles
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Residual at tap

22. Hinderded Settling
Fixed films
Forms clear interface between particles and supernatant( big word) - particles move around the water
Not in my back yard - nutrient overload - crops
Add salt

23. What is special about chloramine
Remove the dead pigs - stuff that would hurt the pumps
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Want pH high for corrosion but lower for HOCL
Always the same dose needed - but that dose is higher

24. Land applicatioin worries
Not in my back yard - nutrient overload - crops
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
OCL
Floating upside down

25. Goal for wastewater disinfection
Optimal dose depends on charge and concentration
The second dip in the graph - free chlorine is formed
Chemically - Aerobically - Anaerobically
No residual

26. 4 types of sedimentation
RMS velocity gradient
Remove as many organic and non organic particles as possible
Discrete - floculation - hindered - compression
Settling of floculant particles

27. 4 mechanisms
Not in my back yard - nutrient overload - crops
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Discrete - floculation - hindered - compression
Last chance to remove particles

28. Disinfection
Remove viruses and bacteria that slipped through filter
RMS velocity gradient
Remove the dead pigs - stuff that would hurt the pumps
Last chance to remove particles

29. Advantage/Disadvantage of Aerobic digestion
Settling of floculant particles
Always the same dose needed - but that dose is higher
Remove viruses and bacteria that slipped through filter
Easy/Costly hard to dewater

30. What is thickening - name 2 ways
Add salt
Residual at tap
De watering - belt press and centrifuge
Chemically - Aerobically - Anaerobically

31. CL catch 22
Last chance to remove particles
Want pH high for corrosion but lower for HOCL
OCL
Remove all flocculated particles

32. Discrete Sedimentation

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33. Sedimentation
Want pH high for corrosion but lower for HOCL
Floating upside down
Optimal dose depends on charge and concentration
High Molecular Weight Synthetics

34. Purpose of sedimentation in waste water
Turn a large number of small particles into a small number of large particles
Floating upside down
Easy/Costly hard to dewater
Remove as many organic and non organic particles as possible

35. Compress double layer
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Add salt
Optimal dose depends on charge and concentration

36. Advantage of trickling filter
Particle in a medium - they don't interact with other particles
Very pH dependent - grab pieces
De watering - belt press and centrifuge
Cheap - low biosolids - resistant to shock - simple