Page 72 - “GREENING” THE CONTENT IN CXC® SYLLABUSES

E-LEARNING MODULES AND LEARNING GUIDE FOR TEACHERS

Biogas

Biogas is produced after organic materials (plant and animal
products) are broken down by bacteria in an oxygen-free

environment. This process is called anaerobic digestion.

Biogas systems use anaerobic digestion to recycle these

organic materials, turning them into biogas which is mainly

made up of methane (70%). Biogas occurs naturally in
landfills. Biogas can also be harnessed by using food waste

or animal dung which is fed into a bio-digester. The gas is

then captured and piped for use by households and
commercial businesses. Source: OLADE

Production Process

Source: OLADE

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