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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. Sedimentation
Optimal dose depends on charge and concentration
Floating upside down
Need enough to make it happen - don't shear the floc though
Big Partices Catch little ones

2. Flocuation settling
Fixed films
Settling of floculant particles
High pH and cold is bad
Sedimentation - suspended solids

3. Bridging
High Molecular Weight Synthetics
Optimal dose depends on charge and concentration
Want pH high for corrosion but lower for HOCL
Cheap - low biosolids - resistant to shock - simple

4. Purpose of sedimentation in drinking water
Last chance to remove particles
Remove all flocculated particles
Particle in a medium - they don't interact with other particles
De watering - belt press and centrifuge

5. Hinderded Settling
Sedimentation - suspended solids
Forms clear interface between particles and supernatant( big word) - particles move around the water
Remove all flocculated particles
Always the same dose needed - but that dose is higher

6. 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
No residual
Remove as many organic and non organic particles as possible
Very pH dependent - grab pieces

7. Land applicatioin worries
Not in my back yard - nutrient overload - crops
Discrete - floculation - hindered - compression
Remove as many organic and non organic particles as possible
Remove all flocculated particles

8. G
Very pH dependent - grab pieces
RMS velocity gradient
Chemically - Aerobically - Anaerobically
Need enough to make it happen - don't shear the floc though

9. Stabilization 3 ways
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Not in my back yard - nutrient overload - crops
Need enough to make it happen - don't shear the floc though
Chemically - Aerobically - Anaerobically

10. Secondary Clairfier removes _____
Easy/Costly hard to dewater
OCL
Residual at tap
Fixed films

11. Dichotomy of energy level for floculation

12. Advantage of trickling filter
Remove viruses and bacteria that slipped through filter
Fixed films
RMS velocity gradient
Cheap - low biosolids - resistant to shock - simple

13. Discrete Sedimentation

14. Adsorption and Charge Nuetralization
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
RMS velocity gradient
Chemically - Aerobically - Anaerobically
Optimal dose depends on charge and concentration

15. Compression Settling
De watering - belt press and centrifuge
Particle in a medium - they don't interact with other 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

16. Differential Sedimentatioin
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
Fixed films
No residual

17. Purpose of sedimentation in waste water
Particle in a medium - they don't interact with other particles
RMS velocity gradient
Remove as many organic and non organic particles as possible
Easy/Costly hard to dewater

18. 4 mechanisms
OCL
Low BOD - High suspended solids - no control - does not match limits`
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Chemically - Aerobically - Anaerobically

19. Point of pre treatment
Floating upside down
Remove the dead pigs - stuff that would hurt the pumps
Cheap - low biosolids - resistant to shock - simple
Residual at tap

20. Disinfection
Remove all flocculated particles
Remove viruses and bacteria that slipped through filter
Cheap - low biosolids - resistant to shock - simple
Acts like a sponge - water moves around particles

21. Enmeshment in Sweep Floc
Big Partices Catch little ones
Low BOD - High suspended solids - no control - does not match limits`
Last chance to remove particles
Very pH dependent - grab pieces

22. What is the effect of temperature and pH
Very pH dependent - grab pieces
Discrete - floculation - hindered - compression
High pH and cold is bad
Easy/Costly hard to dewater

23. filtration is the...
Not in my back yard - nutrient overload - crops
OCL
Floating upside down
Last chance to remove particles

24. Advantage/Disadvantage of Aerobic digestion
Turn a large number of small particles into a small number of large particles
Discrete - floculation - hindered - compression
Fixed films
Easy/Costly hard to dewater

25. Higher pH gives more
Remove as many organic and non organic particles as possible
OCL
Remove the dead pigs - stuff that would hurt the pumps
Turn a large number of small particles into a small number of large particles

26. CL catch 22
Want pH high for corrosion but lower for HOCL
Need enough to make it happen - don't shear the floc though
Remove as many organic and non organic particles as possible
Settling of floculant particles

27. Compress double layer
Need enough to make it happen - don't shear the floc though
Add salt
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Want pH high for corrosion but lower for HOCL

28. What is thickening - name 2 ways
Settling of floculant particles
Remove as many organic and non organic particles as possible
Residual at tap
De watering - belt press and centrifuge

29. What is special about chloramine
The second dip in the graph - free chlorine is formed
Always the same dose needed - but that dose is higher
OCL
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

30. Purpose of Floculation
Easy/Costly hard to dewater
RMS velocity gradient
Turn a large number of small particles into a small number of large particles
Not in my back yard - nutrient overload - crops

31. 4 types of sedimentation
Discrete - floculation - hindered - compression
RMS velocity gradient
No residual
Very pH dependent - grab pieces

32. Primary clarifier uses _____ removes _____
Turn a large number of small particles into a small number of large particles
Sedimentation - suspended solids
Need enough to make it happen - don't shear the floc though
Particle in a medium - they don't interact with other particles

33. Disadvantages of trickling
Cheap - low biosolids - resistant to shock - simple
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
Remove viruses and bacteria that slipped through filter

34. where is the break point in chlorination and what happens after
The second dip in the graph - free chlorine is formed
Remove all flocculated particles
Remove as many organic and non organic particles as possible
High pH and cold is bad

35. Goal for drinking water disinfection
Settling of floculant particles
Forms clear interface between particles and supernatant( big word) - particles move around the water
The second dip in the graph - free chlorine is formed
Residual at tap

36. Goal for wastewater disinfection
De watering - belt press and centrifuge
No residual
OCL
Easy/Costly hard to dewater