WASTEWATER TREATMENT WORKSHEET Name
WASTEWATER TREATMENT WORKSHEET Name___________________________________ [1]
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Introduction
Name four household sources of wastewater other than toilets. [4]
What % of the wastewater mixture entering this treatment plant is only water? [1]
Why is the city’s wastewater treatment plant located at this site? [2]
1.Screening
a. What is removed from the wastewater by the grit chamber? Why? [2]
b. What is removed from the wastewater by the step screen? Why? [2]
2.Phosphorus Removal
a. The biotic phosphorus removal system that takes place in these tanks uses __________________________
that are primarily __________________ to remove phosphorus compounds from the water. [2]
b. What are 3 effects the phosphorus would have on the water quality of the Rock River if it was not removed? [3]
3. Aeration Tanks
a. The aeration tanks use microorganisms that are primarily ____________________________ to remove _____________________ from the wastewater. [2]
b. What are 3 effects the ammonia would have on the water quality of the Rock River if it was not removed? [3]
c. The fact that microorganisms are used to clean up the wastewater indicates that wastewater contains pollutants that are _____________________________. [1]
4. Final Clarifiers
a. What happens in the final clarifiers? [1]
b. The microorganisms settle to the bottoms of the final clarifier because they are ____________________
than water. [1]
c. What happens to most of the microorganisms that have settled to the bottoms of the final clarifiers? [1]
d. What happens to the rest of the microorganisms? [1]
5. Thickening of Biosolids
a. What happens in this stage of treatment? [2]
b. Where do the biosolids removed by this process go? [1]
6. Storage and Disposal of the Biosolids
a. What is the total volume of biosolids that can be stored in these tanks and for approximately how long? [2]
b. What happens to the biosolids after they are removed from the storage tanks? [1]
7. Chlorination
a. What happens to the final water here? Why? [2]
b. What might happen to people swimming or water-skiing in the Rock River if this step in the treatment process was not done? [1]
8. Discharge
a. Where does the final water from this treatment plant go after all treatment is completed? [1]
b. How far does the final water travel to reach the Rock River? How does it get there? [2]
9. Lab Tour
a. List three different items that have been removed from the sewage pipes and saved for “the collection.” [3]
b. Write out the abbreviations and the full names for five of the water quality tests that must be performed in this laboratory. [10]
SEPTIC TANK SYSTEMS
1.What are three similarities between the wastewater treatment plant and a septic tank system? [3]
a.
b.
c.
2. What are three differences between the wastewater treatment plant and a septic tank system? [6]
a.
b.
c.
This paper was corrected by ________________________________________
Grading Scale:subtract the number wrong from 60 to give this assignment a number score. Then use the grading scale below to give this assignment a letter grade. Write the number score and letter grade on the front side.
60-54 = A 53-48 = B 47-42 = C 41-36 = D 35 or less = F
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Raw waste-water arrives at this site
1
Screening
2
Phosphorus
Removal
3
Aeration
Tanks
4
Final
Clarifiers
7
Chlorination of final water
8
Discharge of final water into a river
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5
Thickening of Biosolids
6
Storage and Disposal
of Biosolids
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