Estimate the mass flux of solute (in kg/d · m2 ) for Problem 6-3 if the influent concentration is 35,000 mg/L and the effluent concentration is to be 0.0 mg/L. Assume the mass transfer coefficient for solute flux is 6.14 × 10 –4 m/h.
Problem 6-3
A high-pressure RO system is being evaluated for producing pure water from seawater. It is to be blended with sea water for a drinking water supply. Make an order of magnitude estimate* of the required pressure differential ( Δ P ) if the difference in osmotic pressure must be 2,500 kPa. The mass transfer coefficient for water flux is 6.89 × 10–4 m3 /d · m2 · kPa and the required volumetric flux of water is 170 L/h · m2 .
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