Question

Write three disadvantages of using cow-dung cakes as domestic fuel. What would be a better way of using cow dung?

Answer 1

Disadvantages of cow dung cakes as fuel:

1. The cow dung cakes have low calorific value.
2. They produce a high residual of ash after burning.
3. Cow dung produces high smoke during burning.

Better uses of cow dung:

1. Cow dung can be used to produce biogas.
2. The slurry of cow dung has a rich amount of Nitrogen and Potassium that can be used for fertilizer.
3. It is used as manure after the extraction of biogas.