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Thanks Shanzon for the links, whilst good general background info we are after specifics in terms of osmotic pressures etc. Membrane suppliers have not been able to assist to date.

We have been asked to design an RO system for concentration of whole milk from 12 to 18% solids using RO. Design data for membranes concentrating milk is limited. Can anybody advise necessary pressures required, and typical permeate fluxes achieved when processing milk. Also any info on the...

Aussie Mike, Out of interest, do you know what levels of iron and manganese were present in the bore water? Did they follow the aeration step with media or other types of filtration? We are currently building RO units for desalinaiton of saline bore water for farms etc and are interested in...

I wish to desalinate a bore water using RO. The water contains soluble iron at 3.7mg/l. After exposure to air for approximately 1 hour the water exhibits a slight cloud which is a very fine iron precipitant that is too fine to filter with media type filtration. I am considering designing the...