Secondary Clarification Flashcards
1
Q
What is the difference in needs during secondary clarification following activated sludge process?
A
Activated sludge density is close to water, so it takes longer to settle
2
Q
What are appropriate detention times for secondary clarifiers?
A
2-3 hours, but it may be as high as 6
3
Q
Is a low solids loading rate or high solids loading rate better for a clarifier?
A
Low rate
4
Q
What is a typical target value for sludge blanket in a secondary clarifier?
A
Typically 1-2 feet; but it varies based on clarifier depth
5
Q
What are short circuits?
A
When the liquids in a tank have different velocitities
