Which gas is the primary component of biogas produced during anaerobic digestion?

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Multiple Choice

Which gas is the primary component of biogas produced during anaerobic digestion?

Explanation:
Methane is the main component produced in anaerobic digestion. In the absence of oxygen, microbes break down organic matter through stages that end with methanogenic archaea converting substrates like acetate and hydrogen with carbon dioxide into methane. That methane is the energy-rich gas that makes up the largest share of biogas—typically about half to most of it—while carbon dioxide is also produced in significant amounts, along with small traces of other gases. Oxygen cannot be present in this process, and nitrogen is generally a minor, inert component. So, the primary component of biogas is methane.

Methane is the main component produced in anaerobic digestion. In the absence of oxygen, microbes break down organic matter through stages that end with methanogenic archaea converting substrates like acetate and hydrogen with carbon dioxide into methane. That methane is the energy-rich gas that makes up the largest share of biogas—typically about half to most of it—while carbon dioxide is also produced in significant amounts, along with small traces of other gases. Oxygen cannot be present in this process, and nitrogen is generally a minor, inert component. So, the primary component of biogas is methane.

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