company is currently discharging 200 L/min of 100 mg/L contaminant into a river. The river flowing past the company has an upstream flow rate of 3800 L/min with 0 mg/L of the target contaminant. The company must reduce its effluent co

Structural Analysis
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A company is currently discharging 200 L/min of 100 mg/L contaminant into a river. The river flowing past the company has an upstream flow rate of 3800 L/min with 0 mg/L of the target contaminant. The company must reduce its effluent concentration to below 20 mg/L (a) what is the current contaminant concentration past the point of discharge?

(b) How much clean water would be needed to dilute the contaminant stream to 20 mg/L.?

(c) What would be the contaminant concentration past the point of discharge if the company's contaminant stream was diluted with the water in part b?

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