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Unformatted text preview: Data: Tank height H = 3 m Tank length L = 20 m Particle diameter d p = 20 m Particle density = 2.5 g cm-3 . Design flow rate Q = 1.5 m 3 s-1 (a) Calculate the tank width needed to achieve the desired removal of 20 m-diameter particles (80%). Give your answer in meters. (b) What is the overflow rate for the tank you designed in part (a)? (c) The water also contains particles that are 10 m in diameter. Identify an alternative process to remove these smaller particles from the water. 6. Primary versus secondary air pollutants (a) State the distinction between primary and secondary air pollutants. (b) What is the significance of this distinction for air quality engineering? (c) For each of the following pollutants, state whether they are primary, secondary, or both. Briefly justify your answers. (i) Soot (ii) HCHO (formaldehyde) (iii) NO 2 READING: Chapter 12: pp 524-555...
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- Spring '10