Question

The reoxygenation constant at temperature ‘T’ is expressed by ___________

(a) KRT = KR20 (1.016)^T

(b) KRT = KR20 (1.047) ^T-20

(c) KRT = KR20 (1.016)^T-20

(d) KRT = KR20 (1.047)^T

I had been asked this question during an interview.

My question is from Oxygen Sag Curve topic in section Natural Methods of Wastewater Disposal of Environmental Engineering

Answer 1

The correct choice is (c) KRT = KR20 (1.016)^T-20

For explanation I would say: The reoxygenation constant at temperature ‘T’,

 KRT = KR20 (1.016)^T-20, where  KR20  is the reoxygenation constant at 20^oC.