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Answer: 6.65 mg/L O2 i need clear and correct solution please There are three stages in a cascade. Each step raises the oxygen concentration from

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Answer: 6.65 mg/L O2

i need clear and correct solution please

There are three stages in a cascade. Each step raises the oxygen concentration from 0 to 25% of the saturation value. If the inlet water temperature is 15C and the oxygen concentration is 20% of the saturation value, what will the effluent concentration be

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