Study Guide Answer Key

Here are the answers to the Jan. 17, 2022 edition of TPO's Exam Study Guide: What color is the waste gas burner on a properly operating anaerobic digester with an approximate mixture of methane 68% and carbon dioxide 32%?Answer: The answer to this question is C, blue. Anaerobic digestion uses waste gas burners to burn excess gases from the digestion system. It has a continuously burning pilot flame to safely perform this action. Methane rich gases burn with a blue flame and carbon dioxide rich gases burn orange. This is a quick way to visually check your gas content in the anaerobic digester. This