Dear Iman This is an open ...
Published by Stewart Shipard, Owner Manager at SLS Technology Pty Ltd - a Water Industry company
Dear Iman
This is an open and leading question, no intelligent person would answer it, unless they are prepared to first state 100's of presumptions.
It will depend on what quality is required in the treated water.
And as for "advanced treatment unit" this term "advanced" is so miss used in water industry around the world you should know that you have to define the technology before a useful discussion can be provided.