Which gas is produced by anaerobic digestion and is toxic?

Which gas is produced by anaerobic digestion and is toxic?

• A. Methane
• B. Hydrogen Sulfide
• C. Carbon Dioxide
• D. Oxygen

Answer: (B)

Anaerobic digestion produces biogas mainly composed of methane and carbon dioxide, but sulfur-containing compounds can be transformed into hydrogen sulfide, which is toxic even at low concentrations. Methane is primarily a flammable gas, not acutely toxic at typical exposure levels, and carbon dioxide, while it can cause asphyxiation in extremely high concentrations, isn’t considered a toxin in normal conditions. Oxygen isn’t produced in this process. So, the gas produced by anaerobic digestion that is toxic is hydrogen sulfide.

Anaerobic digestion produces biogas mainly composed of methane and carbon dioxide, but sulfur-containing compounds can be transformed into hydrogen sulfide, which is toxic even at low concentrations. Methane is primarily a flammable gas, not acutely toxic at typical exposure levels, and carbon dioxide, while it can cause asphyxiation in extremely high concentrations, isn’t considered a toxin in normal conditions. Oxygen isn’t produced in this process. So, the gas produced by anaerobic digestion that is toxic is hydrogen sulfide.