Patent ID: 9701558
Date: 2017-07-11
CPC Classifications: B01D,C02F

Claim:
1. A method for separating endotoxins, foulants, sulfate, and oxygen from source water containing bicarbonate to produce treated source water, said method comprising the steps of: (a) separating carbon dioxide and said endotoxins from said source water by (i) mixing aluminum nitrate or iron nitrate with said source water to convert said bicarbonate to said carbon dioxide and separate said endotoxins from proteins from said water source followed by; (ii) separating said carbon dioxide and said endotoxins from said source water by a first set of hydrophobic membranes to produce de-carbonated and de-toxified source water; (b) separating said foulants and said sulfate from said de-carbonated and de-toxified source water by (i) mixing hydrated lime and an amine solvent with said de-carbonated and de-toxified source water in a precipitator unit to form precipitates comprising calcium sulfoaluminate or calcium sulfoferrate to produce de-foulants and de-sulfated source water; (ii) removing said precipitates from said de-foulants and de-sulfated source water by a vacuum filter; (iii) recovering at least a portion of said amine solvent from said de-foulants and de-sulfated source water by said vacuum filter; (c) separating said oxygen and recovering a further portion of said amine solvent from said de-foulants and de-sulfated source water by a second set of hydrophobic membranes to produce said treated source water.