How is cattle dung turned into biogas for cooking, and why is it 'green' fuel?
In a biogas plant, cattle dung and water are digested by anaerobic bacteria, including methanogens (found in the gut of cattle).
In a biogas plant, cattle dung and water are digested by anaerobic bacteria, including methanogens (found in the gut of cattle). In the absence of oxygen they break down the organic matter and release biogas — mostly methane — which burns cleanly for cooking and lighting. The leftover slurry is a good manure. Because it recycles waste into fuel and fertiliser, biogas is a renewable, low-pollution energy source.
Key point
Anaerobic methanogens digest dung to release methane-rich biogas, leaving manure behind.
Common mistake
thinking biogas is produced with oxygen like ordinary burning.
Memory tip
methanogens + dung + no oxygen → methane (biogas) + manure.
Tap to watch or see it right here — the app stays open (it only opens a quick search if nothing embeddable is found).