During secondary aerobic wastewater treatment,some of the activated sludge goes ________ while the rest goes ________.
A) back to the aerator / to the anoxic sludge digestor
B) back to the primary system / to the aerator
C) to the anoxic digestor / back to the primary system
D) back to the primary system / to the tertiary digestor
Correct Answer:
Verified
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