A membrane module comprised of several
tubular membranes has an effective surface area of 12
m2. The membrane system is operated in cross-flow, under
a constant flux regime to yield 1,500 L/h of water. The treated
water is 20 °C.
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- Each tubular membrane is 2 m long and is operated in an
outside-in regime. If the tubes have an outer diameter of 3.0 cm,
how many tubes does each unit contain? (Round your answer UP to the
next whole number)
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- If the membrane resistance is 7.15 ×1012
m-1, what is the operational pressure that must be
applied across the membrane to achieve a flux of 1,500 L/h? (answer
in kPa)
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- What pressure must be applied to keep the flux constant if
membrane fouling doubles the membrane’s resistance?