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Reverse osmosis drinking water system is a water treatment unit. It uses water pressure to reverse a natural physical process called osmosis. Water, under pressure, is forced through a semi-permeable membrane to filter out minerals and impurities. Treated drinking water goes to the faucet. Minerals and impurities are sent to the drain with RO wastewater. The system includes replaceable filters and membrane elements. The prefilter reduces sand, silt, dirt, rust particles, other sediments, and chlorine from the water supply before they enter the RO membrane elements. The post filter reduces any tastes and/or odors that may remain in the water after passing through the RO membrane elements
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The function of the reverse osmosis membranes in water desalination is essentially the same as the function of reverse osmosis in the treatment of wastewater, rejection of electrolyte and permeating the water. In the following decades, there have been significant advances in reverse osmosis membranes, and this has included the development of different membrane materials.
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Reverse osmosis seawater desalination systems are applied for the purification of groundwater, which are polluted by salt and heavy metals. It provides fresh water to hotels, resorts, villages, offshore installations and onboard ships. High-pressure pumps are used in reverse osmosis seawater desalination systems. It is used for co- generation plants for additional production of drinking water using off-peak electrical energy.
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Reverse osmosis systems use RO membrane technology, where the water is forced against a semi-permeable membrane, which is able to separate the water from contaminants dissolved in the water. RO systems for home use are designed for undersink installation. These typically include an RO membrane cartridge; a sediment prefilter that protects the RO membrane; a carbon postfilter that removes any remaining chemicals and gives the water a good taste; a storage tank for treated water; and a faucet to be installed on the countertop. Some systems come with an extra carbon prefilter for additional protection of the RO membrane.