Question

Which amount is the ideal carbon-nitrogen ratio for the raw material into a biogas plant?

(a) 30: 1

(b) 20: 10

(c) 5: 15

(d) 1: 8

This question was addressed to me in my homework.

Question is taken from Anaerobic Fermentation topic in portion Biomass Energy of Energy Engineering

Answer 1

Correct answer is (a) 30: 1

To elaborate: The bacteria responsible for anaerobic process require both elements, as do all living organisms, but they consume carbon roughly 30 times faster than nitrogen. Assuming all other conditions are favorable for biogas production, a carbon – nitrogen ratio of about 30: 1 is ideal for the raw material fed into a biogas plant.