Question: A RO membrane plant needs to provide 3600 m/day. The feedwater has conductivity of 2500 S/cm. The osmotic pressure of the feedwater is approximately

A RO membrane plant needs to provide 3600 m/day. The feedwater has conductivity of 2500 S/cm. The osmotic

A RO membrane plant needs to provide 3600 m/day. The feedwater has conductivity of 2500 S/cm. The osmotic pressure of the feedwater is approximately 150 kPa in the absence of concentration polarization. Design the RO plant with the membrane shown in the following table. Properties (per membrane element) Membrane material Area Permeate flow Thin film composite polyamide 40 m 45.4 m/d @ 1 MPa with 1500 ppm NaCl 99.5% Salt rejection Manufacturer recommendations Maximum applied pressure Maximum feedwater flow Minimum concentrate flow Maximum recovery 4.1 MPa 23.0 m/h 3.0 m/h 17%

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