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...