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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. where is the break point in chlorination and what happens after
Need enough to make it happen - don't shear the floc though
The second dip in the graph - free chlorine is formed
Very pH dependent - grab pieces
Acts like a sponge - water moves around particles

2. filtration is the...
Last chance to remove particles
Optimal dose depends on charge and concentration
High Molecular Weight Synthetics
High pH and cold is bad

3. Flocuation settling
Settling of floculant particles
Need enough to make it happen - don't shear the floc though
De watering - belt press and centrifuge
Optimal dose depends on charge and concentration

4. Differential Sedimentatioin
Fixed films
Big Partices Catch little ones
Remove as many organic and non organic particles as possible
Always the same dose needed - but that dose is higher

5. Purpose of sedimentation in waste water
Very pH dependent - grab pieces
Not in my back yard - nutrient overload - crops
Remove as many organic and non organic particles as possible
Low BOD - High suspended solids - no control - does not match limits`

6. Advantage of trickling filter
Cheap - low biosolids - resistant to shock - simple
OCL
Low BOD - High suspended solids - no control - does not match limits`
Big Partices Catch little ones

7. Secondary Clairfier removes _____
Fixed films
Residual at tap
The second dip in the graph - free chlorine is formed
Cheap - low biosolids - resistant to shock - simple

8. Disinfection
Remove viruses and bacteria that slipped through filter
Particle in a medium - they don't interact with other particles
Acts like a sponge - water moves around particles
High pH and cold is bad

9. What is the effect of temperature and pH
Particle in a medium - they don't interact with other particles
Want pH high for corrosion but lower for HOCL
Acts like a sponge - water moves around particles
High pH and cold is bad

10. Primary clarifier uses _____ removes _____
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
Sedimentation - suspended solids
Remove all flocculated particles

11. Adsorption and Charge Nuetralization
Remove all flocculated particles
Optimal dose depends on charge and concentration
Fixed films
Remove the dead pigs - stuff that would hurt the pumps

12. Goal for wastewater disinfection
Cheap - low biosolids - resistant to shock - simple
Big Partices Catch little ones
Always the same dose needed - but that dose is higher
No residual

13. What is thickening - name 2 ways
Residual at tap
De watering - belt press and centrifuge
Need enough to make it happen - don't shear the floc though
Remove viruses and bacteria that slipped through filter

14. Purpose of Floculation
Turn a large number of small particles into a small number of large particles
High pH and cold is bad
Add salt
Not in my back yard - nutrient overload - crops

15. 4 types of sedimentation
Last chance to remove particles
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
Need enough to make it happen - don't shear the floc though

16. Disadvantages of trickling
Settling of floculant particles
Remove all flocculated particles
Big Partices Catch little ones
Low BOD - High suspended solids - no control - does not match limits`

17. G
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
Chemically - Aerobically - Anaerobically
RMS velocity gradient

18. Discrete Sedimentation

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19. Stabilization 3 ways
Remove viruses and bacteria that slipped through filter
Sedimentation - suspended solids
Always the same dose needed - but that dose is higher
Chemically - Aerobically - Anaerobically

20. Headloss change over time
Last chance to remove particles
Remove viruses and bacteria that slipped through filter
Not in my back yard - nutrient overload - crops
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

21. Land applicatioin worries
Fixed films
Not in my back yard - nutrient overload - crops
Acts like a sponge - water moves around particles
High Molecular Weight Synthetics

22. Enmeshment in Sweep Floc
Particle in a medium - they don't interact with other particles
Very pH dependent - grab pieces
Residual at tap
Remove viruses and bacteria that slipped through filter

23. Sedimentation
Easy/Costly hard to dewater
Floating upside down
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

24. Compression Settling
Very pH dependent - grab pieces
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Remove the dead pigs - stuff that would hurt the pumps
Acts like a sponge - water moves around particles

25. CL catch 22
Big Partices Catch little ones
No residual
Need enough to make it happen - don't shear the floc though
Want pH high for corrosion but lower for HOCL

26. Higher pH gives more
Need enough to make it happen - don't shear the floc though
Forms clear interface between particles and supernatant( big word) - particles move around the water
Big Partices Catch little ones
OCL

27. Advantage/Disadvantage of Aerobic digestion
Forms clear interface between particles and supernatant( big word) - particles move around the water
No residual
Easy/Costly hard to dewater
High Molecular Weight Synthetics

28. Point of pre treatment
Discrete - floculation - hindered - compression
No residual
Acts like a sponge - water moves around particles
Remove the dead pigs - stuff that would hurt the pumps

29. Bridging
Sedimentation - suspended solids
High Molecular Weight Synthetics
RMS velocity gradient
Particle in a medium - they don't interact with other particles

30. Purpose of sedimentation in drinking water
Remove all flocculated particles
Remove the dead pigs - stuff that would hurt the pumps
Need enough to make it happen - don't shear the floc though
De watering - belt press and centrifuge

31. What is special about chloramine
Always the same dose needed - but that dose is higher
High pH and cold is bad
Acts like a sponge - water moves around particles
Cheap - low biosolids - resistant to shock - simple

32. Goal for drinking water disinfection
Residual at tap
Forms clear interface between particles and supernatant( big word) - particles move around the water
Always the same dose needed - but that dose is higher
Remove viruses and bacteria that slipped through filter

33. 4 mechanisms
Forms clear interface between particles and supernatant( big word) - particles move around the water
Remove as many organic and non organic particles as possible
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Want pH high for corrosion but lower for HOCL

34. Hinderded Settling
Add salt
Forms clear interface between particles and supernatant( big word) - particles move around the water
Remove all flocculated particles
Low BOD - High suspended solids - no control - does not match limits`

35. Dichotomy of energy level for floculation

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36. Compress double layer
Remove as many organic and non organic particles as possible
OCL
Always the same dose needed - but that dose is higher
Add salt