Performance Study of Reverse Osmosis Plants for Water Desalination in Bandar-Lengeh, Iran

Introduction: Reverse osmosis (RO) is best known for its use in desalination (removing the salt from seawater to get fresh water), but since the early ۱۹۷۰s it has also been used to purify fresh water for medical, industrial, and domestic applications. The aim of this research was the performance study of reverse osmosis plants for water desalination in Bandar-Lengeh, Iran. Materials and Methods: In this study the concentrations of a number of physical, chemical and biological quality parameters in raw and treated water of Bandar-Lengeh water Desalination Plants were determined and Performance of RO plants for seawater and costal groundwater desalination were studied. There are two desalination plants in Bandar-Lengeh. Water from these plants are used for municipal supply. Total production capacity of the two RO desalination plants is ۸۰۰۰ m۳/d. Results: The results of this study showed average values of TDS, Sodium, Chloride, Sulfate, diatomaceous and Nematodes in seawater were ۳۷۷۴۹ mg/l ۹۷۱۵ mg/l ۲۲۰۲۰ mg/l ۳۰۶۷ mg/l ۲۴۳۳۷ N/۱۰۰ml and ۵ N/۱۰۰ml and in treated water were ۱۲۳۳ mg/l ۴۳۶ mg/l ۷۱۰ mg/l ۵۸ mg/l, ۰ N/۱۰۰ml and ۰ N/۱۰۰ml, respectively. Also the results showed average values of TDS, Sodium, Chloride and Sulfate in coastal ground water were ۳۷۱۳۱ mg/l ۹۳۰۳ mg/l ۲۱۰۷۲ mg/l ۳۷۴۵ mg/l and in treated water were ۶۸۷mg/l ۲۵۳ mg/l ۳۸۹ mg/l ۱۹ mg/l, respectively. Conclusion: The results showed the quality of feed water and pretreatment plays an extremely important role in operational problems such as fouling of RO systems.

کلیدواژه ها:

Osmosis ، Seawater ، Plants ، Fresh Water ، Osmosis ، Seawater ، Plants ، Fresh Water