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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. Compression Settling
Floating upside down
Particle in a medium - they don't interact with other particles
Always the same dose needed - but that dose is higher
Acts like a sponge - water moves around particles

2. Purpose of sedimentation in drinking water
Discrete - floculation - hindered - compression
Turn a large number of small particles into a small number of large particles
Remove all flocculated particles
The second dip in the graph - free chlorine is formed

3. What is thickening - name 2 ways
Settling of floculant particles
No residual
Easy/Costly hard to dewater
De watering - belt press and centrifuge

4. Primary clarifier uses _____ removes _____
Sedimentation - suspended solids
Acts like a sponge - water moves around particles
Big Partices Catch little ones
High Molecular Weight Synthetics

5. 4 types of sedimentation
Add salt
Low BOD - High suspended solids - no control - does not match limits`
Discrete - floculation - hindered - compression
Residual at tap

6. Adsorption and Charge Nuetralization
Remove the dead pigs - stuff that would hurt the pumps
Floating upside down
Remove all flocculated particles
Optimal dose depends on charge and concentration

7. filtration is the...
Acts like a sponge - water moves around particles
Last chance to remove particles
High pH and cold is bad
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

8. Advantage/Disadvantage of Aerobic digestion
Settling of floculant particles
Want pH high for corrosion but lower for HOCL
Easy/Costly hard to dewater
Optimal dose depends on charge and concentration

9. Sedimentation
Chemically - Aerobically - Anaerobically
Discrete - floculation - hindered - compression
Floating upside down
Add salt

10. Land applicatioin worries
No residual
Forms clear interface between particles and supernatant( big word) - particles move around the water
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

11. Point of pre treatment
Remove the dead pigs - stuff that would hurt the pumps
Big Partices Catch little ones
Very pH dependent - grab pieces
Not in my back yard - nutrient overload - crops

12. Higher pH gives more
Last chance to remove particles
OCL
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Settling of floculant particles

13. Advantage of trickling filter
Easy/Costly hard to dewater
Discrete - floculation - hindered - compression
Particle in a medium - they don't interact with other particles
Cheap - low biosolids - resistant to shock - simple

14. Flocuation settling
Very pH dependent - grab pieces
Turn a large number of small particles into a small number of large particles
Want pH high for corrosion but lower for HOCL
Settling of floculant particles

15. Differential Sedimentatioin
Last chance to remove particles
Remove as many organic and non organic particles as possible
RMS velocity gradient
Big Partices Catch little ones

16. Purpose of Floculation
Turn a large number of small particles into a small number of large particles
Chemically - Aerobically - Anaerobically
Settling of floculant particles
Remove all flocculated particles

17. 4 mechanisms
Big Partices Catch little ones
No residual
Fixed films
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

18. Bridging
Floating upside down
Discrete - floculation - hindered - compression
High Molecular Weight Synthetics
Want pH high for corrosion but lower for HOCL

19. Secondary Clairfier removes _____
Fixed films
Want pH high for corrosion but lower for HOCL
Remove as many organic and non organic particles as possible
High pH and cold is bad

20. Discrete Sedimentation

21. where is the break point in chlorination and what happens after
The second dip in the graph - free chlorine is formed
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Remove viruses and bacteria that slipped through filter
Low BOD - High suspended solids - no control - does not match limits`

22. CL catch 22
Want pH high for corrosion but lower for HOCL
The second dip in the graph - free chlorine is formed
High pH and cold is bad
OCL

23. Headloss change over time
Floating upside down
Very pH dependent - grab pieces
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

24. Dichotomy of energy level for floculation

25. Disinfection
Want pH high for corrosion but lower for HOCL
Remove viruses and bacteria that slipped through filter
Cheap - low biosolids - resistant to shock - simple
Discrete - floculation - hindered - compression

26. Goal for drinking water disinfection
De watering - belt press and centrifuge
Residual at tap
Chemically - Aerobically - Anaerobically
Remove as many organic and non organic particles as possible

27. Purpose of sedimentation in waste water
RMS velocity gradient
Discrete - floculation - hindered - compression
Remove as many organic and non organic particles as possible
Chemically - Aerobically - Anaerobically

28. What is special about chloramine
Not in my back yard - nutrient overload - crops
Always the same dose needed - but that dose is higher
Optimal dose depends on charge and concentration
De watering - belt press and centrifuge

29. Goal for wastewater disinfection
Want pH high for corrosion but lower for HOCL
Turn a large number of small particles into a small number of large particles
Settling of floculant particles
No residual

30. Compress double layer
Turn a large number of small particles into a small number of large particles
Add salt
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

31. What is the effect of temperature and pH
Want pH high for corrosion but lower for HOCL
Sedimentation - suspended solids
High pH and cold is bad
Settling of floculant particles

32. Stabilization 3 ways
Chemically - Aerobically - Anaerobically
Always the same dose needed - but that dose is higher
Remove all flocculated particles
The second dip in the graph - free chlorine is formed

33. Enmeshment in Sweep Floc
Very pH dependent - grab pieces
Turn a large number of small particles into a small number of large particles
Forms clear interface between particles and supernatant( big word) - particles move around the water
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

34. G
Easy/Costly hard to dewater
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Want pH high for corrosion but lower for HOCL
RMS velocity gradient

35. Disadvantages of trickling
Cheap - low biosolids - resistant to shock - simple
Optimal dose depends on charge and concentration
Low BOD - High suspended solids - no control - does not match limits`
RMS velocity gradient

36. Hinderded Settling
Forms clear interface between particles and supernatant( big word) - particles move around the water
Discrete - floculation - hindered - compression
Remove as many organic and non organic particles as possible
Settling of floculant particles