Here are the answers to the July 28, 2022 edition of TPO's Exam Study Guide:

Given the following data:

MLSS 1,900 mg/l; RMLSS 3,200 mg/l; Plant Q 1.65 mgd
Aeration tank volume 2.5 mg; RAS Q .9 mgd
Clarifier Volume .75 mg; aeration tank DO 3.2 mg/l

How much sludge should be wasted...

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