How many plates will be required in a lamella clarifier for the following data?

Question

How many plates will be required in a lamella clarifier for the following data?
Flow: 120 m³/h
Area of plate: 1.8 m²
Rise rate: 0.9 m³/m²/h

Options:

A . 75

B . 80

C . 85

D . 90

Answer: Option A
Answer: (a).75

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