Class 12 Botany simulations · Microbes in Human Welfare

Biogas plant

Feed cattle dung slurry into a digester. Methanogens break it down anaerobically and the floating gas holder rises.

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What to notice

Methanogens such as Methanobacterium live in the rumen of cattle, so dung is rich in them.

Key relation

Organic matter —methanogens (anaerobic)→ CH₄ + CO₂ (+ H₂S)

Try this

Increase the dung fed per day and see the gas holder rise faster.

What you can change

• Dung fed per day: 10 to 200 kg
• Digester temperature: 15 to 40 °C

More in Microbes in Human Welfare

• Sewage treatment and BOD

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