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An apparatus and method suitable for use in a reverse osmosis desalinization system having a first process chamber has a first reverse osmosis membrane therein, a first feed inlet, a first permeate outlet, and a first concentrate outlet. A second process chamber having a second reverse osmosis membr

An apparatus and method suitable for use in a reverse osmosis desalinization system having a first process chamber has a first reverse osmosis membrane therein, a first feed inlet, a first permeate outlet, and a first concentrate outlet. A second process chamber having a second reverse osmosis membrane has a second feed inlet, a second permeate outlet, and a second concentrate outlet.

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1. A reverse osmosis system comprising:a first process chamber having a first reverse osmosis membrane therein, said first process chamber having a first feed inlet, a first permeate outlet and a first concentrate outlet; a second process chamber having a second reverse osmosis membrane therein, sai

1. A reverse osmosis system comprising:a first process chamber having a first reverse osmosis membrane therein, said first process chamber having a first feed inlet, a first permeate outlet and a first concentrate outlet; a second process chamber having a second reverse osmosis membrane therein, said second process chamber having a second feed inlet, a second permeate outlet and a second concentrate outlet; a common shaft having rotatably coupled thereto a first pump fluidically coupled to said first feed inlet, a pump motor, a first energy recovery turbine fluidically coupled to said first concentrate outlet and a second energy recovery turbine fluidically coupled to said second concentrate outlet; and, a second pump fluidically coupled to said first concentrate outlet and the second feed inlet.