engineering recuitment GATE CE 2023-24 Test Series Environmental Engineering Quality and Characteristics of Sewage
A wastewater sample is experimented for 5-day BOD at 20°C and it is found to be 120 mg/L. If the reaction rate constant is 0.414 (base e) per day then the amount of BOD remaining in the sample after 8 days is ______
1
4.0 mg/L
2
3.0 mg/L
3
6.5 mg/L
4
5.0 mg/L