Industrial and brackish water treatment with closed circuit reverse osmosis

This paper describes the design and modeling of high-recovery CCD processes and compares the measured and calculated specific energy consumption levels to validate modeling methods and tools

Richard L. Stover

2012

Scholarcy highlights

  • Closed Circuit Desalination technology is an emerging platform for reverse osmosis water treatment and desalination
  • A CCD unit can be added to a conventional RO process to concentrate brine and raise recovery
  • The recovery rate of a CCD unit can be adjusted at the control panel without modification of system hardware, limited only by the scaling characteristics of the feedwater
  • Short membrane arrays and high cross-flow allow the CCD process to operate at higher average fluxes than conventional RO processes, without exceeding the membrane manufacturer’s flow or recovery specifications
  • This paper describes the design and modeling of high-recovery CCD processes and compares the measured and calculated specific energy consumption levels to validate modeling methods and tools
  • Over 97% recovery has been demonstrated in a single-stage operation
  • CCD systems are compared favorably to conventional RO trains modeled with the same feedwater, high-pressure pumps, and membranes operating at the same average flux and overall recovery percentage

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