Research on small capacity salted water treatment technology for home use using solar energy

Abstract

Fresh water is the basic life demand, but this resource is unevenly distributed lacking, and polluted in many places. Sea water is a great potential resource to produce fresh water, especially in the context of increasing drought and saline intrusion. This study performed experiments on various types of nanofiltration (NF) and reverse osmosis (RO) membranes to evaluate their desalination efficiency. Therefore, the adequate type of filter was used as a core item in a solar-powered desalination system was assessed the treatment efficiency. Finding results showed that the desalination efficiency of RO membrane was very high, approximately 99.6%. A complete desalination system was built and operated to evaluate the desalination efficiency. The quality of treated water met the threshold value of QCVN 01-1:2018/BYT, a regulation on domestic water quality. The technology could be applied widely in saline intrusion zones and areas without access to hygienic water supply sources.

Key words: Desalination system; nanofiltration membrane; reverse osmosis membrane; solar energy; saline water.