A 80 sm thick polysulphone microporous membrane has an average porosity of $ε =$ 0.4 . Pure water flux through the membrane is $30 m^{3} / m^{2} h$ at a pressure drop of 1.5 bar at $2 5^{\circ} C$ . The average pore size is estimated to be $3 μ m$ . Calculate the tortuosity factor of the pores, and water permeability of the membrane. The viscosity of water at $25 C$ is $0.85 CP$ . [ $5 + 2M$ ]

Question

A 80 sm thick polysulphone microporous membrane has an average porosity of

ε =

0.4 . Pure water flux through the membrane is

30 m^{3} / m^{2} h

at a pressure drop of 1.5 bar at

2 5^{\circ} C

. The average pore size is estimated to be

3 μ m

. Calculate the tortuosity factor of the pores, and water permeability of the membrane. The viscosity of water at

25 C

is

0.85 CP

. [

5 + 2M

]

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