Energy Conservation Practice Test

Digesters increase energy use because methane capture requires burning additional coal on-site, which always exceeds any recovered energy value.

Anaerobic digesters eliminate the need for any treatment energy because microbes perform all pumping and aeration using biological motion.

Digesters conserve energy by converting methane into oxygen, which increases combustion efficiency in nearby engines without changing fuel use.

Captured biogas can be used for heat or electricity, offsetting purchased energy and reducing methane emissions compared with uncontrolled release.