A ground water with salinity (TDS) of 2850 mg/L is treated with reverse osmosis desalination process for drinking water production and the permeate salinity (TDS) is measured to be 200 mg/L. The feed flow rate and permeate flow rate of the membrane process are 4000m³/d and 3200m³/d, respectively. It is known the resistance of the membrane Rm is 10¹¹ Pa-s/m and the driving pressure AP is 10 bar. The osmotic pressure of the water can be determined by the rule of thumb (psi) = 0.01TDS (mg/L). Determine (1) the required salt rejection rate of the membrane, (2) the recovery of the RO process, (3) the permeate flux through the membrane and the required membrane area, (4) the flow rate and salinity (TDS) of the concentrate flow.

A ground water with salinity (TDS) of 2850 mg/L is treated with reverse osmosis desalination process for drinking water production and the permeate salinity (TDS) is measured to be 200 mg/L. The feed flow rate and permeate flow rate of the membrane process are 4000m³/d and 3200m³/d, respectively. It is known the resistance of the membrane Rm is 10¹¹ Pa-s/m and the driving pressure AP is 10 bar. The osmotic pressure of the water can be determined by the rule of thumb (psi) = 0.01TDS (mg/L). Determine (1) the required salt rejection rate of the membrane, (2) the recovery of the RO process, (3) the permeate flux through the membrane and the required membrane area, (4) the flow rate and salinity (TDS) of the concentrate flow.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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