Wastewater Treatment Operator Class III Practice Questions - ABC WPI Wastewater Treatment Operator Class III Certification Exam

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In a UCT (University of Cape Town) process, where does the mixed-liquor recycle returning to the anaerobic zone originate?

From the aerobic zone From the anoxic zone From the final clarifier effluent From the primary clarifier

Correct Answer:

From the anoxic zone

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