What is the nitrogen population equivalent value per day?

• A. 1 lb per day
• B. .02 lbs per day
• C. .2 lbs per day
• D. 0.002 lbs per day

Answer: (B)

Nitrogen population equivalent value per day represents the typical amount of nitrogen contributed by one person each day, used to estimate a community’s nutrient loading in wastewater design and treatment calculations. For municipal wastewater, this per-person nitrogen load is about 8–10 grams per day, which is roughly 0.018–0.022 pounds per day. Rounded, that becomes approximately 0.02 pounds per day. So the best answer is the value that matches this standard per-person load. Converting 0.02 pounds to grams gives about 9 grams per day, which aligns with common wastewater nitrogen loading figures. The other options are either too high or too low for per-person daily nitrogen contributions.