Effluent BOD given Ultimate BOD Solution

STEP 0: Pre-Calculation Summary
Formula Used
Effluent BOD = Influent BOD-(((5 days BOD/Ultimate BOD)*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate)
Qo = Qi-(((BOD5/BODu)*(O2+(1.42*Qw*XR)))/SF)
This formula uses 8 Variables
Variables Used
Effluent BOD - (Measured in Kilogram per Cubic Meter) - Effluent BOD is the amount of BOD present in the outing sewage.
Influent BOD - (Measured in Kilogram per Cubic Meter) - Influent BOD is the total amount of BOD which is present in the incoming sewage.
5 days BOD - (Measured in Kilogram per Cubic Meter) - 5 days BOD is an indicator of how much oxygen is utilized by a natural water sample in five days at 20 degrees C.
Ultimate BOD - (Measured in Kilogram per Cubic Meter) - Ultimate BOD is the amount of oxygen required to decompose all of the organic material after infinite time.
Theoretical Oxygen Requirement - (Measured in Kilogram per Second) - Theoretical oxygen requirement is the calculated amount of oxygen required to oxidize a compound to its final oxidation products.
Volume of Wasted Sludge per day - (Measured in Cubic Meter per Second) - Volume of wasted sludge per day is measured in terms of discharge.
MLSS in returned or wasted sludge - (Measured in Kilogram per Cubic Meter) - MLSS in returned or wasted sludge is the mixed liquor suspended solids in returned sludge in terms of mg per litre.
Sewage Flowrate - (Measured in Cubic Meter per Second) - Sewage Flowrate is the flow rate of sewage when it is being discharged in the river.
STEP 1: Convert Input(s) to Base Unit
Influent BOD: 11.2 Milligram per Liter --> 0.0112 Kilogram per Cubic Meter (Check conversion here)
5 days BOD: 2 Milligram per Liter --> 0.002 Kilogram per Cubic Meter (Check conversion here)
Ultimate BOD: 2 Milligram per Liter --> 0.002 Kilogram per Cubic Meter (Check conversion here)
Theoretical Oxygen Requirement: 2.5 Milligram per Day --> 2.89351851851852E-11 Kilogram per Second (Check conversion here)
Volume of Wasted Sludge per day: 9.5 Cubic Meter per Second --> 9.5 Cubic Meter per Second No Conversion Required
MLSS in returned or wasted sludge: 2 Milligram per Liter --> 0.002 Kilogram per Cubic Meter (Check conversion here)
Sewage Flowrate: 15 Cubic Meter per Second --> 15 Cubic Meter per Second No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Qo = Qi-(((BOD5/BODu)*(O2+(1.42*Qw*XR)))/SF) --> 0.0112-(((0.002/0.002)*(2.89351851851852E-11+(1.42*9.5*0.002)))/15)
Evaluating ... ...
Qo = 0.00940133333140432
STEP 3: Convert Result to Output's Unit
0.00940133333140432 Kilogram per Cubic Meter -->9.40133333140432 Milligram per Liter (Check conversion here)
FINAL ANSWER
9.40133333140432 9.401333 Milligram per Liter <-- Effluent BOD
(Calculation completed in 00.004 seconds)

Credits

Created by Suraj Kumar
Birsa Institute of Technology (BIT), Sindri
Suraj Kumar has created this Calculator and 2200+ more calculators!
Verified by Ishita Goyal
Meerut Institute of Engineering and Technology (MIET), Meerut
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4 Effluent BOD Calculators

Effluent BOD given Oxygen Demand and Ultimate BOD Both
Go Effluent BOD = Influent BOD-(((5 days BOD/Ultimate BOD)*(Theoretical Oxygen Requirement+(Oxygen demand of biomass*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate)
Effluent BOD given Oxygen Demand of Biomass
Go Effluent BOD = Influent BOD-((Ratio of BOD to Ultimate BOD*(Theoretical Oxygen Requirement+(Oxygen demand of biomass*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate)
Effluent BOD given Ultimate BOD
Go Effluent BOD = Influent BOD-(((5 days BOD/Ultimate BOD)*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate)
Effluent BOD given Oxygen Required in Aeration Tank
Go Effluent BOD = Influent BOD-((Ratio of BOD to Ultimate BOD*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate)

Effluent BOD given Ultimate BOD Formula

Effluent BOD = Influent BOD-(((5 days BOD/Ultimate BOD)*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate)
Qo = Qi-(((BOD5/BODu)*(O2+(1.42*Qw*XR)))/SF)

What is BOD ?

Biochemical oxygen demand is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.

How to Calculate Effluent BOD given Ultimate BOD?

Effluent BOD given Ultimate BOD calculator uses Effluent BOD = Influent BOD-(((5 days BOD/Ultimate BOD)*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate) to calculate the Effluent BOD, Effluent BOD given Ultimate BOD calculates value of effluent BOD when we have prior information of other parameters used. Effluent BOD is denoted by Qo symbol.

How to calculate Effluent BOD given Ultimate BOD using this online calculator? To use this online calculator for Effluent BOD given Ultimate BOD, enter Influent BOD (Qi), 5 days BOD (BOD5), Ultimate BOD (BODu), Theoretical Oxygen Requirement (O2), Volume of Wasted Sludge per day (Qw), MLSS in returned or wasted sludge (XR) & Sewage Flowrate (SF) and hit the calculate button. Here is how the Effluent BOD given Ultimate BOD calculation can be explained with given input values -> 9401.333 = 0.0112-(((0.002/0.002)*(2.89351851851852E-11+(1.42*9.5*0.002)))/15).

FAQ

What is Effluent BOD given Ultimate BOD?
Effluent BOD given Ultimate BOD calculates value of effluent BOD when we have prior information of other parameters used and is represented as Qo = Qi-(((BOD5/BODu)*(O2+(1.42*Qw*XR)))/SF) or Effluent BOD = Influent BOD-(((5 days BOD/Ultimate BOD)*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate). Influent BOD is the total amount of BOD which is present in the incoming sewage, 5 days BOD is an indicator of how much oxygen is utilized by a natural water sample in five days at 20 degrees C, Ultimate BOD is the amount of oxygen required to decompose all of the organic material after infinite time, Theoretical oxygen requirement is the calculated amount of oxygen required to oxidize a compound to its final oxidation products, Volume of wasted sludge per day is measured in terms of discharge, MLSS in returned or wasted sludge is the mixed liquor suspended solids in returned sludge in terms of mg per litre & Sewage Flowrate is the flow rate of sewage when it is being discharged in the river.
How to calculate Effluent BOD given Ultimate BOD?
Effluent BOD given Ultimate BOD calculates value of effluent BOD when we have prior information of other parameters used is calculated using Effluent BOD = Influent BOD-(((5 days BOD/Ultimate BOD)*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate). To calculate Effluent BOD given Ultimate BOD, you need Influent BOD (Qi), 5 days BOD (BOD5), Ultimate BOD (BODu), Theoretical Oxygen Requirement (O2), Volume of Wasted Sludge per day (Qw), MLSS in returned or wasted sludge (XR) & Sewage Flowrate (SF). With our tool, you need to enter the respective value for Influent BOD, 5 days BOD, Ultimate BOD, Theoretical Oxygen Requirement, Volume of Wasted Sludge per day, MLSS in returned or wasted sludge & Sewage Flowrate and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Effluent BOD?
In this formula, Effluent BOD uses Influent BOD, 5 days BOD, Ultimate BOD, Theoretical Oxygen Requirement, Volume of Wasted Sludge per day, MLSS in returned or wasted sludge & Sewage Flowrate. We can use 3 other way(s) to calculate the same, which is/are as follows -
  • Effluent BOD = Influent BOD-((Ratio of BOD to Ultimate BOD*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate)
  • Effluent BOD = Influent BOD-((Ratio of BOD to Ultimate BOD*(Theoretical Oxygen Requirement+(Oxygen demand of biomass*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate)
  • Effluent BOD = Influent BOD-(((5 days BOD/Ultimate BOD)*(Theoretical Oxygen Requirement+(Oxygen demand of biomass*Volume of Wasted Sludge per day*MLSS in returned or wasted sludge)))/Sewage Flowrate)
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