The BOD5 of a waste has been measured 500 mg/l. If K= 0.26/day (base e), what is the
ultimate BOD, of waste? What proportion of BOD, remains unoxidised after 20 days?
Answers
Answered by
2
The answer is "687 mg/l"
Explanation:
BOD is the amount of oxygen required by the micro-organisms to degrade organic matter in the waste water
The formula to calculate BOD ultimate is
BOD ultimate = BOD5/(1-e^-kt)
Thus, it will become
BOD ultimate = 500/(1-e^-(0.26*5)
BOD ultimate = 687 mg/l
Now, we need to find BOD after 20 days. For that we will use
BOD20= BOD ultimate (1-e^-kt)
BOD20 = 687 (1-e^-0,26*20)
BOD20 = 683 mg/l
Answered by
0
lo=687ppm
bod20=683.2ppm
Explanation:
bod5 =Lo(1-10^-kt); find Lo
bod20=Lo(1-10^-kt);find bod20
Similar questions