Method and System for High Recovery Water Desalting

摘要

A method of desalting an aqueous solution includes performing a demineralization process on a concentrate solution to produce a demineralized solution and performing a desalting process. A method of recovering an aqueous solution includes performing a first membrane based separation process on a feed stream to produce a permeate stream and a concentrate stream, performing a demineralization process on the concentrate stream to produce a solid phase and a liquid phase, separating the solid phase from the liquid phase, and performing a second membrane based separation process on the liquid phase. The demineralization process includes adding chemical additives to induce calcium carbonate precipitation and subsequently adding gypsum seeds to the concentrate stream.