Nano-filtration: Water molecules and some dissolved salt go through selective semi-permeable membrane by action of higher permeable pressure. While other impurities such as colloid, organic matters, bacteria, microorganism drained with concentrated water. The technique suits for desalinate, soften water, refining biologic and chemical products, special foodstuff and dyes.
Filtration principle:
Source water---Source water pump---Quartz sand filter---Active carbon filter---Fine filer---High pressure pump---Main NF system