Question

Compensation for lower temperatures can be achieved by reducing hydraulic and organic loading rates thereby increasing _____________

(a) Retention time

(b) Mixing

(c) Aeration

(d) Sparging

I have been asked this question by my school principal while I was bunking the class.

I'd like to ask this question from Biological Treatment of Waste Water topic in portion Biological Treatment of Waste Water of Environmental Biotechnology

Answer 1

Correct answer is (a) Retention time

The explanation: A temperature drop allows reduction in nitrification and removal of BOD, so, Compensation for lower temperatures can be achieved by reducing hydraulic and organic loading rates thereby increasing the retention time, more is the retention time, more will be the waste available for degradation hence, increasing the efficiency of waste water treatment, mixing, aeration and sparging doesn’t help with lowering the temperature or compensating with the temperature drop.