Question 2019 of 234 · California Wastewater Operator Exam
Which in-plant stream is a recycle flow that can raise influent BOD and ammonia when returned untreated?
Exactly one answer is correct.
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Correct answer to question 2019
- C: Dewatering and digester supernatant
Explanation
Digester supernatant and dewatering filtrate carry high BOD, ammonia and solids, and returning them at once can shock the plant. Spreading these flows over the day reduces upsets.
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