Question 4003 of 234 · California Wastewater Operator Exam
The purpose of wasting activated sludge (WAS) is to
Exactly one answer is correct.
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Correct answer to question 4003
- C: remove excess microorganisms and control the sludge age
Explanation
Biomass grows as it consumes food, so some must be wasted to hold MLSS and MCRT at the target level. Wasting more lowers MLSS and shortens MCRT.
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