Depending on your feed ...
Published by David Cifuentes, Edible Fats and Oils, Industry Manager at Flottweg Separation Technoloy
Depending on your feed levels and how low you want to go, you may need two pass RO or possibly RO/DI,
If less than 10 ppm is your target, and you're starting with drinking quality water, a single pass system using standard High-Rejection PA membranes will likely do the trick. If you want lower than that, you may need two pass RO. If you want