Reverse Osmosis principles Osmosis Reverse Osmosis dead end filtration and cross flow filtration System flow rating Recovery and Rejection Concentration polarizationc Fouling Scaling Silt Density Index Modified Fouling Index Langelier Saturation Index Transport models Membrane technology Basic Flow patterns [Arrays recycle double pass Multiple Trains] Reverse Osmosis Skids Water quality science and principles Mechanical Pretreatment Chemical Pretreatment Sequencing of pretreatment technologies Membrane bio fouling and disinfection approaches Design considerations On line and off line operations Performance degradation System Engineering Trouble shooting Recent breakthroughs and advances Summary Conclusions and analysis of near future achievements