What best describes the environmental impact of releasing wastewater with high level of BOD into a river?
1) If the 5-day BOD of an undiluted sample is 5 ppm and the DO (or [O2]) after 5 days is: (Assume the initial DO is 9.1 ppm.) 5 ppm 0 ppm 9.1 ppm 4.1 ppm 2) The BOD5 of a sample is 33 ppm. The BOD7 is most probably: > 33 ppm = 33 … Read more