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In an RO sea-water system, with only 30 percent conversion rate, it appears that the systems are not very efficient. Is that the case?

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In an RO sea-water system, with only 30 percent conversion rate, it appears that the systems are not very efficient. Is that the case?

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No, not at all! There are energy recovery devices (ERD) that can be used in the larger sea water RO systems that extract the pressure energy from the reject flow to either produce additional flow rates or reduce the energy required to operate the systems. With the use of an ERD, the system efficiency can be as high as 70 to 80 percent.

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