HEYA MATE, HERE IS UR ANSWER. Thanks for asking this QUESTION. 1.COW dung cake has low calorific value i.e. 3.1kJ/g than the Methane gas (5.5kJ/g), a biogas constituent.2.Bio gas is a clean fuel that burns WITHOUT smoke and leaves no ash, unlike cow dung.3.The by-product os biogas PLANTS i.e. the spent slurry, being rich in nitrogen and phosphorus is a good manure.I HOPE IT HELPS U.
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