• A small digester tank (usually 2–6 m³ capacity) installed near the house kitchen.

• Uses cow or buffalo dung, or food scraps as feedstock.

• Produces biogas for cooking and as organic fertiliser.

• Clean cooking fuel → replaces firewood, LPG, or kerosene.

• Cost savings → reduces fuel expenses for families.

• Health improvement → less smoke indoors, better air quality.

• Eco-friendly → cuts methane emissions and improves waste management.

• Fertiliser output → nutrient-rich slurry for fields and gardens.