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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. What is thickening - name 2 ways
De watering - belt press and centrifuge
OCL
Last chance to remove particles
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

2. Goal for wastewater disinfection
Sedimentation - suspended solids
No residual
Cheap - low biosolids - resistant to shock - simple
Fixed films

3. Purpose of sedimentation in waste water
Optimal dose depends on charge and concentration
Add salt
Remove as many organic and non organic particles as possible
Very pH dependent - grab pieces

4. Enmeshment in Sweep Floc
Very pH dependent - grab pieces
Want pH high for corrosion but lower for HOCL
Cheap - low biosolids - resistant to shock - simple
Remove all flocculated particles

5. Headloss change over time
Fixed films
Settling of floculant particles
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Sedimentation - suspended solids

6. Purpose of sedimentation in drinking water
Forms clear interface between particles and supernatant( big word) - particles move around the water
Remove all flocculated particles
Residual at tap
Turn a large number of small particles into a small number of large particles

7. Sedimentation
Cheap - low biosolids - resistant to shock - simple
Settling of floculant particles
Floating upside down
Remove all flocculated particles

8. Secondary Clairfier removes _____
Cheap - low biosolids - resistant to shock - simple
Remove viruses and bacteria that slipped through filter
Fixed films
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam

9. Discrete Sedimentation

10. Advantage of trickling filter
Residual at tap
Cheap - low biosolids - resistant to shock - simple
Floating upside down
The second dip in the graph - free chlorine is formed

11. Point of pre treatment
Last chance to remove particles
Optimal dose depends on charge and concentration
Low BOD - High suspended solids - no control - does not match limits`
Remove the dead pigs - stuff that would hurt the pumps

12. 4 mechanisms
Remove as many organic and non organic particles as possible
Remove all flocculated particles
Acts like a sponge - water moves around particles
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

13. CL catch 22
Very pH dependent - grab pieces
OCL
Want pH high for corrosion but lower for HOCL
Floating upside down

14. What is the effect of temperature and pH
Sedimentation - suspended solids
De watering - belt press and centrifuge
High pH and cold is bad
Need enough to make it happen - don't shear the floc though

15. Advantage/Disadvantage of Aerobic digestion
Easy/Costly hard to dewater
Remove as many organic and non organic particles as possible
Last chance to remove particles
Particle in a medium - they don't interact with other particles

16. Stabilization 3 ways
Sedimentation - suspended solids
Chemically - Aerobically - Anaerobically
RMS velocity gradient
Low BOD - High suspended solids - no control - does not match limits`

17. Higher pH gives more
Remove all flocculated particles
Fixed films
OCL
Floating upside down

18. Purpose of Floculation
Very pH dependent - grab pieces
Floating upside down
Turn a large number of small particles into a small number of large particles
Optimal dose depends on charge and concentration

19. Primary clarifier uses _____ removes _____
Need enough to make it happen - don't shear the floc though
Sedimentation - suspended solids
Acts like a sponge - water moves around particles
Last chance to remove particles

20. Dichotomy of energy level for floculation

21. Land applicatioin worries
Discrete - floculation - hindered - compression
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
Remove all flocculated particles

22. G
High Molecular Weight Synthetics
Residual at tap
Need enough to make it happen - don't shear the floc though
RMS velocity gradient

23. Flocuation settling
Last chance to remove particles
Settling of floculant particles
Forms clear interface between particles and supernatant( big word) - particles move around the water
Not in my back yard - nutrient overload - crops

24. Compress double layer
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Optimal dose depends on charge and concentration
Add salt
Floating upside down

25. Disadvantages of trickling
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Sedimentation - suspended solids
Low BOD - High suspended solids - no control - does not match limits`
Need enough to make it happen - don't shear the floc though

26. Disinfection
Remove the dead pigs - stuff that would hurt the pumps
Floating upside down
Low BOD - High suspended solids - no control - does not match limits`
Remove viruses and bacteria that slipped through filter

27. Goal for drinking water disinfection
Residual at tap
Sedimentation - suspended solids
Remove viruses and bacteria that slipped through filter
De watering - belt press and centrifuge

28. Hinderded Settling
Very pH dependent - grab pieces
No residual
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

29. Differential Sedimentatioin
Big Partices Catch little ones
OCL
Discrete - floculation - hindered - compression
Residual at tap

30. Bridging
High Molecular Weight Synthetics
Turn a large number of small particles into a small number of large particles
Always the same dose needed - but that dose is higher
Very pH dependent - grab pieces

31. where is the break point in chlorination and what happens after
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging
Low BOD - High suspended solids - no control - does not match limits`
Cheap - low biosolids - resistant to shock - simple
The second dip in the graph - free chlorine is formed

32. Compression Settling
Discrete - floculation - hindered - compression
Remove as many organic and non organic particles as possible
Sedimentation - suspended solids
Acts like a sponge - water moves around particles

33. Adsorption and Charge Nuetralization
Chemically - Aerobically - Anaerobically
No residual
Remove the dead pigs - stuff that would hurt the pumps
Optimal dose depends on charge and concentration

34. 4 types of sedimentation
Remove all flocculated particles
Discrete - floculation - hindered - compression
Turn a large number of small particles into a small number of large particles
Acts like a sponge - water moves around particles

35. filtration is the...
Last chance to remove particles
Particle in a medium - they don't interact with other particles
Settling of floculant particles
Not in my back yard - nutrient overload - crops

36. What is special about chloramine
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Chemically - Aerobically - Anaerobically
Always the same dose needed - but that dose is higher
Want pH high for corrosion but lower for HOCL