A new membrane plant is being designed. Pilot testing indicates that the membran

Question

A new membrane plant is being designed. Pilot testing indicates that the membrane will be able to operate at a specific flux of 120 L/m^2 h bar at 20 degree C. The full-scale plant will operate at 0.8 bar, online production factor of 95 percent, and recovery of 97 percent. Water demand projections predict a summer peak-day demand of 90,000 m^3 / d and a winter peak-day demand of 60,000 m^3 / d. Historical records indicate that the source water has a minimum temperature of 3 degree C in winter and 18 degree C in summer. Which season will govern the size (membrane area) of the plant? What is the required membrane area?

Explanation / Answer

a)   As the demand of water is higher in the summers , the summer season will govern the size of the membrane

b)   120 * 10^-3 * 24 * A * 0.8 * 0.97 * 0.95   = 90000

      A = 42390.124   m^2

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