ENVE 2200 Environmental Concepts and Application in Engineering Assignment Brief 2025

Assignment Brief

1.The BOD of a sewage sample incubated for 2 days at 30 o C has been found to be 140 mg/L. What will be the expected 5-day BOD at 20o C if the BOD rate constant (to base 10), K20 = 0.16 day-1 . 

• REMEMBER: 't'-day BOD = organic matter expected to be or removed in 't' days, measured in terms of oxygen. GIVEN: KT= K20 (1.047) (T - 20) 

2. If the BOD of a wastewater sample has an ultimate BOD (Lu ) of 188 mg/L and a BOD rate constant k (to base e) of 0.52 day-1at 15 oC, what is its expected 5-day BOD at 20 o C. 

3.The 5-day, 20o C BOD of a sample from the Detroit River, one day downstream from the point of sewage discharge from Windsor is determined to be 3.0 mg/L. Assuming that no other pollution is added between the sampling point and Windsor outfall sewer (sewage discharge), calculate the 5-day, 20 o C BOD at the point of sewage discharge from Windsor. Given K (base 10) at 20 oC = 0.1 day -