Which of the following is an aerobic process used in secondary wastewater treatment?
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A.
Anaerobic Digestion
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B.
Upflow Anaerobic Sludge Blanket (UASB)
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C.
Activated Sludge Process
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D.
Anaerobic Filters
Correct Answer:
C. Activated Sludge Process
Explanation:
The Activated Sludge Process is a common aerobic biological method used in secondary wastewater treatment. During this stage, oxygen is introduced into aeration tanks to support the growth of aerobic microorganisms. these bacteria and other microbes form flocs, known as activated sludge, which consume and break down organic pollutants in the wastewater. Unlike anaerobic digestion, upflow anaerobic sludge blankets, or anaerobic filters—which function in the absence of oxygen—the activated sludge process relies on continuous aeration to maintain the aerobic environment necessary for effective waste decomposition.
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