Question

Which of the following expression is correct regarding deoxygenation constant where symbols have their usual meaning?

(a) KDT = KD20  + (1.047)^T-20

(b) KDT = KD20 / (1.047)^T-20

(c) KDT = KD20 (1.047)^T-20

(d) KDT = KD20 (1.04^T)

I had been asked this question in semester exam.

My doubt stems from Population Equivalent and Relative Stability topic in chapter Wastewater Characteristics of Environmental Engineering

Answer 1

The correct choice is (c) KDT = KD20 (1.047)^T-20

To explain: KDT = KD20 (1.047)^T-20 where,  KDT is the deoxygenation constant at temperature ‘T’ and KD20 is the deoxygenation constant at 20^oC.