Analytical Design Equations for Multisolute Reverse Osmosis Processes by Tubular Modules

Ravi Prasad, Kamalesh K. Sirkar

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


For “straight-through” tubular modules with turbulent flow Inside tubes, simple analytical equations have been developed to determine the number of membrane tubes required and the permeate concentrations of solutes if the dilute feed has two highly rejected solutes and a given fractional solvent recovery is desired. Extension to three or more solutes is straightforward. These equations have high predictive accuracy for seawater type feeds with low water recovery. The analytical equations of the design methods based on breaking up the tubular RO plant into two or three sections for calculational purposes achieve high predictive accuracies for brackish water type feeds with high water recoveries. The predictive accuracies of these methods have been checked by comparing the calculated results from these analytical equations with those from a numerical solution of the exact set of equations based on a solution-diffusion type of model of multicomponent reverse osmosis.

Original languageEnglish (US)
Pages (from-to)320-329
Number of pages10
JournalIndustrial and Engineering Chemistry Process Design and Development
Issue number2
StatePublished - Apr 1 1984
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • General Engineering
  • Industrial and Manufacturing Engineering


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