NF/RO/ED The manufacturing process of high hardness drinking water using NF/RO/ED membrane connection system

摘要

The present invention relates to a mineral water quality control technology that removes sulfate ions and chlorine ions during the desalination process of seawater (deep sea water or concentrated water) and retains useful minerals such as magnesium and calcium. More particularly, (ED), nanofiltration (NF) and reverse osmosis (RO) systems using a combination of selective minerals, electrodialysis (ED) and nanofiltration membranes (NF) The removal of materials, and the development of a process linkage system for optimal water quality control during the desalination process. The ERO / NF / ED or NF / ED coupling process is a process that can simultaneously produce deep sea water treatment water containing demineralized water, concentrated water, mineral desalted water, mineral concentrated water and a function, It can save energy, produce deep ocean water treatment in large quantity, remove sulfuric acid ion and chlorine ion, produce mineral concentrated water, adjust the pH of alkaline water produced by adjusting the electric current of electrolytic bath from 10 to 13 Calcium carbonate precipitate is formed at pH 10 and magnesium hydrate is formed at pH 13, so that the calcium and magnesium mineral extract can be separated and extracted, which makes it possible to produce a high hardness water suitable for the quality of the water to be consumed. Energy can be reduced.