Engineering Board Exam Reviewer · Environmental Engineering · medium
A rapid sand filter is designed for a filtration rate of 120 m3/m2· day. What filter area is needed to treat 20,000 m3/day?
- 2.4 m2
- 6.94 m2
- 60.0 m2
- 166.7 m2
Answer
D. 166.7 m2
Solution
A = Q/rate = 20,000/120 = 166.7 m2.
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