Accession Number : AD0687508

Title :   STAGEWISE REVERSE OSMOSIS PROCESS DESIGN,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED CHEMISTRY

Personal Author(s) : Kimura,Shoji ; Sourirajan,S. ; Ohya,Haruhiko

Report Date : 01 JUL 1968

Pagination or Media Count : 12

Abstract : Reverse osmosis is treated as a general separation process which can be operated in stages, if necessary. Equations developed for stagewise reverse osmosis process design are based on the Kimura-Sourirajan analysis of the reverse osmosis data for water and solute transport through the Loeb-Sourirajan type porous cellulose acetate membranes. The analysis involves the specification of the membrane in terms of the pure water permeability constant, A, and the solute transport parameter. Following the formalism of the multistage distillation process, the cascade theory is applied to the multistage reverse osmosis process, and expressions for the minimum number of stages and minimum reflux ratio are derived. The ideal cascade theory is then used to establish a practical criterion for multistage reverse osmosis process design. Application of the design equations is illustrated by a set of calculations with particular reference to saline water conversion. (Author)

Descriptors :   (*DESALINATION, *OSMOSIS), SEA WATER, TRANSPORT PROPERTIES, CELLULOSE ACETATES, CANADA, MEMBRANES

Subject Categories : Industrial Chemistry and Chemical Processing
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE