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A waste stream has a dissolved oxygen concentration of 1.5 mg/L, a flow of 0.5 m3...

A waste stream has a dissolved oxygen concentration of 1.5 mg/L, a flow of 0.5 m3 /s, a temperature of 26°C, and an ultimate BOD (or BODu) of 48 mg/L. The waste stream is discharged into a river that is running at 2.2 m3 /s at a saturated DO, a temperature of 12°C, and an ultimate BOD of 1.6 mg/L.

A) Calculate the mixing (a) temperature and (b) ultimate BOD for the river water immediately after discharge of the waste stream.

B) Calculate the mixing dissolved oxygen for the river water immediately after discharge of the waste stream. What is the initial DO deficit of the river after mixing with the waste stream?

Engineering   Civil-Engineering   
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