A) 1 - Large aeration tanks; 2 - Chemical agitation; 3 - High; 4 - Anaerobic
B) 1 - Large aeration tanks; 2 - Mechanical agitation; 3 - Low; 4 - Anaerobic
C) 1 - Large aeration tanks; 2 - Chemical agitation; 3 - Low; 4 - Aerobic
D) 1 - Large aeration tanks; 2 - Mechanical agitation; 3 - High; 4 - Anaerobic
Correct Answer: B
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