A Replacement for the Silt Density Index: Permanganate Demand to Predict Reverse Osmosis Membrane Fouling.

Abstract

A new test to predict the fouling potential of a reverse osmosis (RO) feedwater was developed. The Permanganate Demand Test is based on both of the accepted equations used to describe the solvent and solute flow through the membrane. It characterizes the reduction in solvent flow by an increase in the osmotic pressure at the membrane. The Silt Density Index (SDI) is a membrane test that has come into widespread use to predict the fouling potential of a feedwater. RO processes can be expected to operate successfully over a long period of time without significant reduction in permeate flux if the SDI values are between 2 and 5.3, on a scale of 1 to 6.67. The SDI was found to be sensitive to suspended particles large enough to be measured as turbidity, but insensitive to dissolved metal concentrations.

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Document Details

Document Type
Technical Report
Publication Date
Oct 13, 1983
Accession Number
ADA135437

Entities

People

  • R. Binovi

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Aqueous Solutions
  • Calcium Compounds
  • Chemical Synthesis
  • Chemistry
  • Hydrogen
  • Measurement
  • Organic Chemistry
  • Organic Compounds

Fields of Study

  • Environmental science

Readers

  • Computational Modeling and Simulation
  • Environmental Engineering
  • Underwater engineering and Marine Technology.