Multiple choice

A biogas plant works to its maximum capacity when

  1. conditions are aerobic and temperature 40°C

  2. conditions are aerobic and sewage is supplied

  3. conditions are anaerobic and temperature 40°C

  4. conditions are anaerobic and sewage is supplied

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biogas production requires anaerobic conditions where bacteria break down organic matter without oxygen, with optimal efficiency around 40°C.