Microbes in Biogas Production:

• Biogas, methane-rich gas, produced by microbial activity.
• Gas type depends on microbes and organic substrates used.

Role of Methanogens:

• Anaerobic bacteria, methanogens, produce methane, CO2, and H2.
• Common bacterium: Methanobacterium.

Applications of Methanogens:

• Found in anaerobic sludge during sewage treatment.
• Present in the rumen of cattle, aiding cellulose breakdown.

Gobar Gas Production:

• Cattle dung (gobar) rich in methanogens used for biogas.
• Biogas plant structure: Concrete tank, floating cover, outlets.

Biogas Plant Operation:

• Slurry of dung in the tank ferments, producing biogas.
• Floating cover rises with gas production.
• Outlet supplies biogas to nearby houses.
• Spent slurry used as fertilizer.

Rural Implementation:

• Biogas plants common in rural areas with abundant cattle dung.
• Developed technology in India by IARI and KVIC.

Usage and Visit:

• Biogas used for cooking and lighting.
• Encouragement to explore nearby biogas plants for further understanding.