Question

Which of the following processes provide both energy and manure?

(a) Burning of fuelwood

(b) Pyrolysis of wood

(c) Biogas formation

(d) Gasification of wood

This question was posed to me in examination.

I would like to ask this question from Bioenergy topic in division Microbes in Human Welfare of Biology – Class 12

Answer 1

Right option is (c) Biogas formation

To elaborate: Biogas formation yields manure for two crops in one acre and 2m^3 of fuel gas having 9000 kcal of energy with useful one being 2700 kcal and at 30% burning efficiency.