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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. Bridging
High Molecular Weight Synthetics
Add salt
Sedimentation - suspended solids
Chemically - Aerobically - Anaerobically

2. Primary clarifier uses _____ removes _____
Sedimentation - suspended solids
Floating upside down
Very pH dependent - grab pieces
Residual at tap

3. What is the effect of temperature and pH
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
High pH and cold is bad
Fixed films
High Molecular Weight Synthetics

4. Purpose of sedimentation in waste water
Discrete - floculation - hindered - compression
The second dip in the graph - free chlorine is formed
High pH and cold is bad
Remove as many organic and non organic particles as possible

5. What is thickening - name 2 ways
Remove viruses and bacteria that slipped through filter
High Molecular Weight Synthetics
De watering - belt press and centrifuge
Optimal dose depends on charge and concentration

6. Enmeshment in Sweep Floc
Not in my back yard - nutrient overload - crops
Acts like a sponge - water moves around particles
Very pH dependent - grab pieces
Forms clear interface between particles and supernatant( big word) - particles move around the water

7. G
Always the same dose needed - but that dose is higher
De watering - belt press and centrifuge
RMS velocity gradient
Not in my back yard - nutrient overload - crops

8. CL catch 22
Particle in a medium - they don't interact with other particles
Remove as many organic and non organic particles as possible
Remove the dead pigs - stuff that would hurt the pumps
Want pH high for corrosion but lower for HOCL

9. Sedimentation
Big Partices Catch little ones
Floating upside down
Residual at tap
Forms clear interface between particles and supernatant( big word) - particles move around the water

10. What is special about chloramine
Chemically - Aerobically - Anaerobically
Not in my back yard - nutrient overload - crops
Remove viruses and bacteria that slipped through filter
Always the same dose needed - but that dose is higher

11. where is the break point in chlorination and what happens after
Need enough to make it happen - don't shear the floc though
Remove as many organic and non organic particles as possible
Acts like a sponge - water moves around particles
The second dip in the graph - free chlorine is formed

12. Adsorption and Charge Nuetralization
Optimal dose depends on charge and concentration
Particle in a medium - they don't interact with other particles
High pH and cold is bad
Forms clear interface between particles and supernatant( big word) - particles move around the water

13. Stabilization 3 ways
Chemically - Aerobically - Anaerobically
Easy/Costly hard to dewater
Fixed films
Settling of floculant particles

14. Point of pre treatment
Forms clear interface between particles and supernatant( big word) - particles move around the water
Remove the dead pigs - stuff that would hurt the pumps
Sedimentation - suspended solids
Fixed films

15. 4 types of sedimentation
Fixed films
Want pH high for corrosion but lower for HOCL
Remove viruses and bacteria that slipped through filter
Discrete - floculation - hindered - compression

16. Compression Settling
Acts like a sponge - water moves around particles
No residual
Last chance to remove particles
OCL

17. Discrete Sedimentation

18. Secondary Clairfier removes _____
Big Partices Catch little ones
Fixed films
Residual at tap
Particle in a medium - they don't interact with other particles

19. Hinderded Settling
Forms clear interface between particles and supernatant( big word) - particles move around the water
Always the same dose needed - but that dose is higher
Fixed films
RMS velocity gradient

20. Land applicatioin worries
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
The second dip in the graph - free chlorine is formed
No residual

21. Advantage/Disadvantage of Aerobic digestion
Easy/Costly hard to dewater
The second dip in the graph - free chlorine is formed
Need enough to make it happen - don't shear the floc though
RMS velocity gradient

22. filtration is the...
Remove viruses and bacteria that slipped through filter
Last chance to remove particles
Need enough to make it happen - don't shear the floc though
Very pH dependent - grab pieces

23. Higher pH gives more
Remove as many organic and non organic particles as possible
High Molecular Weight Synthetics
OCL
Acts like a sponge - water moves around particles

24. Purpose of Floculation
Remove the dead pigs - stuff that would hurt the pumps
Remove all flocculated particles
Turn a large number of small particles into a small number of large particles
The second dip in the graph - free chlorine is formed

25. Disadvantages of trickling
Low BOD - High suspended solids - no control - does not match limits`
Remove the dead pigs - stuff that would hurt the pumps
High Molecular Weight Synthetics
Not in my back yard - nutrient overload - crops

26. Dichotomy of energy level for floculation

27. Purpose of sedimentation in drinking water
Remove all flocculated particles
Residual at tap
Need enough to make it happen - don't shear the floc though
Acts like a sponge - water moves around particles

28. Headloss change over time
Discrete - floculation - hindered - compression
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Acts like a sponge - water moves around particles
Easy/Costly hard to dewater

29. Differential Sedimentatioin
Add salt
Big Partices Catch little ones
Last chance to remove particles
Turn a large number of small particles into a small number of large particles

30. Advantage of trickling filter
Optimal dose depends on charge and concentration
Last chance to remove particles
Very pH dependent - grab pieces
Cheap - low biosolids - resistant to shock - simple

31. Goal for wastewater disinfection
Very pH dependent - grab pieces
No residual
Particle in a medium - they don't interact with other particles
Always the same dose needed - but that dose is higher

32. 4 mechanisms
High Molecular Weight Synthetics
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Last chance to remove particles
Forms clear interface between particles and supernatant( big word) - particles move around the water

33. Flocuation settling
Settling of floculant particles
Remove as many organic and non organic particles as possible
Always the same dose needed - but that dose is higher
Remove all flocculated particles

34. Goal for drinking water disinfection
Last chance to remove particles
Residual at tap
High pH and cold is bad
Add salt

35. Disinfection
Remove viruses and bacteria that slipped through filter
De watering - belt press and centrifuge
Last chance to remove particles
Turn a large number of small particles into a small number of large particles

36. Compress double layer
Need enough to make it happen - don't shear the floc though
Fixed films
Sedimentation - suspended solids
Add salt