Question 4014 of 234 · California Wastewater Operator Exam
White, billowy foam on an aeration tank is most often a sign of
Exactly one answer is correct.
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Correct answer to question 4014
- C: a young sludge or startup condition
Explanation
White foam usually indicates too little MLSS, a low sludge age, or detergent type loads. It often clears up as the sludge matures.
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