Question

Too nitrogen will cause ____________

(a) Poisonous gases

(b) Reduction in fertility of mixture

(c) Reduction in quantity of mixture

(d) Mixture to harden

I had been asked this question in an online quiz.

This interesting question is from Anaerobic Fermentation topic in portion Biomass Energy of Energy Engineering

Answer 1

Correct choice is (b) Reduction in fertility of mixture

Explanation: Too much nitrogen will cause this to be left over at the end of digestion and reduce the quality of the fertilizer produced by biogas plant. The correct ratio of carbon to nitrogen will prevent loss of either fertilizer quality or methane content.