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A reverse osmosis plant desalinates

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A reverse osmosis plant desalinates 5x10^6 L/day of feedwater containing 1500mg/L of salts yielding 3x10^6 L/day of product water with 75 mg/L of salt. What would the salt concentration be in the brine?

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The solution provides detailed calculations and explanations for the problem of the reverse osmosis plant.

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Original salt content in the feedwater = 5*10^6 L/day * 1500 mg/L =7.5*10^6 ...

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