California State University Long Beach Environmental Engineering Question

Question Description

I’m working on a civil engineering question and need support to help me study.

I have one question for the principal environmental engineering class,

This is the question

You are setting up a new tank for your pet fish, Spot. You know that Spot needs a minimum dissolved oxygen concentration of 5.0 mg/L, but your tap water contains only 2.5 mg/L. So before putting Spot into the new tank, you turn on the air pump and bubble air through the water. If the oxygen transfer rate coefficient is 1.4/h, and the water temperature is 20°C, what is the minimum time that you must bubble air through the water before you can put Spot into the tank?

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