Study Guide Answer Key

Here are the answers to the Dec. 8, 2022 edition of TPO's Exam Study Guide: When referring to odors and odor control in wastewater treatment, what is the definition of odor threshold? The answer to the question is C. Odor control has become an important topic in many wastewater treatment facilities due to surrounding community growth. The point where the lowest concentration at which a compound can be detected by human smell is known as the odor threshold. It is the point where you can detect the odor. Odors in wastewater treatment may be from anaerobic decay (fermentation) or the production of sulfides.