NEET Botany Sewage Treatment MCQ Question
If a sewage treatment plant processes 1 million gallons of sewage per day, and the primary treatment removes 60% of solids through sedimentation, how many gallons of effluent proceed to secondary treatment each day?
400,000 gallons
600,000 gallons
1 million gallons
500,000 gallons
Correct Answer
Detailed Explanation
During primary treatment, 60% of solids are removed, leaving 40% as effluent. Therefore, 40% of 1 million gallons, which is 600,000 gallons, proceed to secondary treatment.
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