Question Detail
Question
What is the primary product of microbial action in 'Wastewater & Biogas' treatment, as described in the document?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Page 8, under 'Wastewater & Biogas,' states that 'Microbes treat sewage (activated sludge) and produce methane-rich biogas.'
Hint
This process produces a valuable gaseous fuel.