Which of the following is/are products of wastewater treatment?
Both biogas and sludge
The correct option is C.
The explanation of the correct option:
The explanation of the incorrect option:
Option A
Sludge is produced during wastewater treatment. Biogas is also produced.
Option B
Biogas production decreases the water pollution by oxygen level needed by organic material. both biogas and sludge are produced during wastewater treatment.
Option D
An aerator is a mechanical device used for the aeration and allows the mixing of air.
Final answer: Biogas and sludge are products of wastewater treatment.