The relationship between oxygen consumption and equivalent biodegradable organic removal (i.e., BOD) in a closed container with respect to time is shown in the figure
Assume that the rate of oxygen consumption is directly proportional to the amount of degradable organic matter and is expressed as ‌
dLt
dt
=−kLt, where, Lt (in mg/litre) is the oxygen equivalent of the organics remaining at time t and k( in d−1) is the degradation rate constant. L0 is the oxygen equivalent of organic matter at time, t=0.
In the above context, the correct expression is

Question

Examsnet · Accepted Answer

Correct Answer is :  BODt=L0−Lt

GATE Civil Engineering (CE) 2020 Shift 2 Solved Paper