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Basics of Reverse Osmosis for Brackish Groundwater Treatment



Many professionals in membrane desalination design, operation and maintenance are faced with the difficult task of keeping current on the rapidly changing technology. Reverse osmosis membrane products change as the suppliers introduce new models. How and when to best apply these products and what features and benefits they offer must be analyzed before optimum performance can be realized. Additionally, tools such as design and normalization software are often revised and improved.

This teleconference will go over some of the basic design considerations impacting reverse osmosis membranes used in groundwater desalination and then apply these principles to some specific application problems. Our faculty will review examples of successful installations as well as problems encountered and countermeasures. You'll learn about the use of newer, energy-efficient membranes and how they can improve water quality at lower cost. You will learn about potential pitfalls and get suggestions on how to avoid these problems. This teleconference will also discuss software and guidelines for how to select and employ software both in system design and troubleshooting.

Upon completion of this courses, students will have developed an understanding of:

  • The Flow of Water Through the Membrane
  • The Flow of Salt Through the Membrane
  • Osmotic Pressure
  • Spiral Wound Element Characteristics
  • Membrane Sensitivities (Polyamide, Thin Film Composite)
  • Oxidizing Agents; Chlorine, Permanganate
  • Organics; Low Molecular Weight, Humic and Fulvic Acids
  • Weakly Ionized Species; Boron, Silica, Nitrate
  • Reverse Osmosis System Design
  • Feed Water Characterization and Variability
  • Goals of the Membrane Treatment Process
  • Pretreatment
  • Post-Treatment
  • Membrane/Element Selection
  • Software to Aid System Design
  • Assistance From Industry Organizations and Conferences
  • Case Histories of Recent Installations (Within Last Three Years)
  • Newer Low Pressure Membrane/Elements
  • Energy Savings
  • Permeate Quality
  • Capital Cost Impact
  • Operating Cost Impact
  • Normalization Software to Monitor System Performance
  • Online Monitoring
  • Replacement Strategies for Removing Aged Membranes
  • Troubleshooting and Options When Questions Occur
  • Acquiring Replacement Membrane/Elements
  • Successful Membrane Plant Operation
  • The Membranes and the System Are Owned by You
  • Changes Usually Happen Slowly - Awareness Saves Money


  • You will be able to discuss reverse osmosis process principles.
  • You will be able to discuss case histories of installations within the last three years.
  • You will be able to identify how to apply reverse osmosis membrane products.
  • You will be able to discuss potential pitfalls and know how to avoid these problems.


Student assessment will be done through questions based on the content delivered throughout the course.

course quick facts
course code 383256EAU
cost $249.00
estimated time to
complete course
2 Hours
course materials
365 Days

Randolph L. Truby, with Toray Membrane USA., Inc., has been in the membrane desalination industry for his entire 40-year career. He is CEO for Toray's U.S. membrane manufacturing business in San Diego, as well as global team leader for Toray worldwide membrane sales and marketing.