Problem Solved: Organic Loading Problem - Wastewater Math

Описание: This question comes from the California Wastewater grade 2 certification exam sample questions that can be found here: http://www.swrcb.ca.gov/water_issues/...

The problem reads:
A trickling filter wastewater treatment plant receives a flow 1.95 MGD. Calculate the organic loading to this plant if it has a 135 ft diameter trickling filter with a 5 foot media depth and has a primary effluent BOD concentration of 110 mg/L.

a. 0.5 lbs BOD/1000 ft³/day.
b. 2.7 lbs BOD/1000 ft³/day.
c. 25 lbs BOD/1000 ft³/day.
d. 39 lbs BOD/1000 ft³/day.
e. 44 lbs BOD/1000 ft³/day

http://americanwatercollege.org