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Whey is the main byproduct obtained from cheese production, and it contains a high concentration of valuable organic matter, but demineralization is needed before it can be used. Nanofiltration (NF) membranes have high permeability for monovalent salts (e.g. NaCl, KCl) and organic compounds with low molecular weight, and very low permeability for organic compounds of molecular weight higher than 300Da,...
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