Question 4012 of 234 · California Wastewater Operator Exam
The best location to measure the settleability of mixed liquor with a 30-minute test is
Exactly one answer is correct.
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Correct answer to question 4012
- C: a sample taken from the end of the aeration tank
Explanation
Mixed liquor from the aeration tank outlet represents the sludge going to the clarifier. The 30-minute settling test in a graduated cylinder gives SV30 and is used to calculate SVI.
More questions: Secondary Treatment (Activated Sludge, Trickling Filters, RBC)
- 4013Foam that is thick, brown, and greasy on an aeration tank is often caused by
- 4014White, billowy foam on an aeration tank is most often a sign of
- 4015Nitrification is the biological conversion of
- 4016Denitrification occurs when
- 4017Rising sludge or floating clumps in a secondary clarifier on a hot day is often caused by
- 4018A trickling filter is a