Question

Secondary treatment systems can be used for biological degradation of ____________ in municipal waste waters.

(a) Carbon dioxide and methane

(b) Nitrogen and CO2

(c) CO and methane

(d) Organic pollutants

I have been asked this question in class test.

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

Answer 1

The correct option is (d) Organic pollutants

To elaborate: Organic pollutants are the most ubiquitous in the environment and they get accumulated in the environment and persist there because of their non-biodegradable properties and hence, secondary treatment methods using biological degradation is used for removal of organic pollutants in industrial and municipal waste waters, CO2, methane, Nitrogen, CO, can be removed by primary treatment methods.