Designing and optimizing 10,000 m3/day conventional SWRO desalination plant
Ezzeghni, Usama Ahmed
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Desalination of seawater has been considered as one of the most promising techniques for supplying a fresh water in Libya. Reverse osmosis (RO) is one of the main technologies for big size desalination plants for the reason that it offers an ability of producing a high quality and quantity of fresh water from seawater with a minor specific energy consumption compared to the other thermal evaporation processes. This paper aims to collect and apply the most useful mathematical equations and software of designing a seawater RO desalination plant with a capacity of 10,000 m3/day. Moreover, its pretreatment equipment such as sedimentation tank, high-pressure pump, multimedia and cartridge filters. IMSdesign software developed by Nitto Hydranuatics Company used for designing and optimizing the membrane assembly of the suggested plant. Additionally, the energy recovery device (ERD) specification accomplished by the same earlier software. In addition, the recommended antiscalant dose predicted by PWT ProDose software. The recovery of the plant increased to more than 40% with less number of membrane elements due to installing new advanced membranes (SWC6 MAX) developed by Nitto Hydranuatics Company. Moreover, pressure exchanger device recommended for the designed plant to decrease the specific pumping energy from 4.81 kWh/m3 to 2.09 kWh/m3, which saves more energy, thus, decreases the unit product cost of the plant.