Polluted water would have a BOD reading between what level?Group of answer choices1–2 ppm3–5 ppm6–9 ppm

Multiple Choice QuestionWater with a high oxygen content (greater than 6 ppm) will support Blank______, which is an indicator of good water quality.Multiple choice question.game fishmainly worms and bacteriaonly decomposers

Determine the BOD5 for a 10 mL sample, collected from wastewater stream in Jamdoli that is diluted to a total volume of 300 mL when the initial dissolved oxygen is 8.5 mg/L and after 5 days, has been reduced to 2.5 mg/L.a.180 mg/Lb.140 mg/Lc.120 mg/Ld.160mg/L

The BOD5 of a waste water is determined to be 240 mg/l at 20℃. The k value at 20℃ is known to be 0.23 day-1 . Calculate the BOD7 if the test were run at 10℃.ans.258.12 mg/l224.05 mg/l240 mg/l196.89 mg/l Previous Marked for Review Save & Finish

If a pollutant entered the water, which reservoir would it impact the most?Group of answer choicesAtmosphereLakesRiverssoilgroundwater

An unseeded BOD test is run using 25 ml of waste water mixed with 200 ml of pure water. The value of k at 20℃ is 0.22 day-1. The initial DO of the mixture is 12 mg/l. After 5 days the DO remains fixed at 4 mg/l. The remaining oxygen demand of the waste after 5 days is ans. 29.3 mg/lit. 35.9 mg/lt. 14.6 mg/lit. 68.2 mg/lit