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Water purity in some regions in World and its deficiency in other areas represent a dramatic arising problem, so saving a drop of water saving a life! Great losses of concentrate water and so rich nutrients in RO desalination plants; which requires economic strategies for these by products recovery and so saving water from drainage. This work which was done in National research centre in Egypt in 2015 tries to stress on solutions for such problems with a collective case studies from different industries applying different technologies but faces the same environmental problems.

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Dr. Marwa is a holder of a PhD. Degree in process development of chemical engineering related industries. Dr shalaby started her career in national research centre in Egypt after graduation from the chemical Engineering Department in the Faculty of Engineering in Cairo university. she had participated in many RO-Desalination plants developments.

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