18 Questions
What percentage of settleable solids can a well-operated primary clarifier remove?
90%
Can operators use sludge blanket levels in primary clarifiers to adjust sludge pumping rates?
Yes
Do baffles ahead of outlet weirs in primary tanks serve as a barrier to inhibit the loss of floating solids and grease?
Yes
If a primary clarifier does not have adequate detention time, what would be the result?
Overloading of collector or flight drive motor
What happens if the sludge depth in a secondary sedimentation tank is too high?
Sludge may become septic
At a 2.5 MGD wastewater treatment plant, if the primary clarifier has a detention time of 2 hours, how many gallons does this clarifier hold?
$10,000$ gallons
What percentage of settleable solids can a well-operated primary clarifier remove?
90-95%
Can operators use sludge blanket levels in primary clarifiers to adjust sludge pumping rates?
True
Do baffles ahead of outlet weirs in primary tanks serve as a barrier to inhibit the loss of floating solids and grease?
True
What would be the result if a primary clarifier does not have adequate detention time?
Overloading of collector or flight drive motor
If the sludge depth in a secondary sedimentation tank is too high, what will happen?
Sludge may become septic
At a 2.5 MGD wastewater treatment plant, if the primary clarifier has a detention time of 2 hours, how many gallons does this clarifier hold?
$10,000$ gallons
What percentage of settleable solids can a well-operated primary clarifier remove?
90-95%
Can operators use sludge blanket levels in primary clarifiers to adjust sludge pumping rates?
True
Do baffles ahead of outlet weirs in primary tanks serve as a physical barrier to inhibit the loss of floating solids and grease?
True
If the sludge depth in a secondary sedimentation tank is too high, what will happen?
Sludge may become septic
What would be the result if a primary clarifier does not have adequate detention time?
Overloading of collector or flight drive motor
At a 2.5 MGD wastewater treatment plant, if the primary clarifier has a detention time of 2 hours, how many gallons does this clarifier hold?
15,000 gallons
Test your knowledge about primary clarifiers and their operation with this assessment quiz. Answer questions about the removal of settleable solids, the use of sludge blanket levels, the function of baffles, and the detention capacity of primary clarifiers.
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