Disadvantages Of Reverse Osmosis

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ABSTRACT The demand of fresh and pure water is increasing day by day and due to many problems around different areas of world the supply of fresh water is not up to the desired level. Reverse Osmosis plant, therefore, helps to prove reliable and energy efficient process in producing the fresh water with many large plants presently being used around the world. Desalination by RO requires high pumping pressure in the range of 45-80 bar which is usually supplied by electrical driven pumps in steady state. This thesis is explaining the cost analysis of replacing these electrical pumps with a wind turbine driven pumps and concluding that whether this replacement is economically feasible or not. The paper will cover the comparison of operating and capital cost for these two plants with the aim to determine that whether wind powered…show more content…
• The costs for installation are low • The production capacity ratio is very high ranging from 25000 to 60000 l/day/m2 • It requires less maintenance, only the change of proper filters are required • The source for the RO process is unlimited sea water • It helps to remove inorganic and organic contaminants • It has almost no impact on the environment • RO technology uses very less chemicals Disadvantages: Along with the advantages this technology also have some disadvantages as well which are as follows: • The membranes are very sensitive to abuse • The pretreatment of feed water is needed • The plant requires high quality equipments and staff • There is a need to carefully discard the Brine as it contains some toxic materials • A reliable source of energy is required • The maintenance costs are relatively high as compare to other methods (desalination by reverse osmosis) Main requirement: The main requirement of RO process is the selection of membrane and energy requirement is of the initial pressurization of the feed
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