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Influent BOD given Oxygen Demand of Biomass Calculator

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Influent BOD Important Formulas of Oxygen Requirement of the Aeration Tank BOD to Ultimate BOD BOD5 More >>

✖Effluent BOD given Oxygen Demand of Biomass is the amount of oxygen that is consumed by the microbial population in the effluent to decompose organic matter present.ⓘ Effluent BOD given Oxygen Demand of Biomass [Q_b]			+10% -10%
✖Ratio of BOD to Ultimate BOD is the ratio of 5 days bod to ultimate bod.ⓘ Ratio of BOD to Ultimate BOD [f]			+10% -10%
✖Theoretical Oxygen Requirement is the calculated amount of oxygen required to oxidize a compound to its final oxidation products.ⓘ Theoretical Oxygen Requirement [O₂]			+10% -10%
✖Oxygen Demand of Biomass is the amount of oxygen required by the microorganisms to decompose organic matter present in biomass.ⓘ Oxygen Demand of Biomass [D^O2]			+10% -10%
✖Volume of Wasted Sludge per day is the amount of sludge that is removed or wasted from a wastewater treatment process on a daily basis.ⓘ Volume of Wasted Sludge per day [Q_w]			+10% -10%
✖MLSS in Returned or Wasted Sludge is the mixed liquor suspended solids in returned sludge in terms of mg per liter.ⓘ MLSS in Returned or Wasted Sludge [X^R]			+10% -10%
✖Sewage Discharge is the flow rate of sewage when it is being discharged in the river.ⓘ Sewage Discharge [Q_s]			+10% -10%

✖Influent BOD is the total amount of BOD which is present in the incoming sewage.ⓘ Influent BOD given Oxygen Demand of Biomass [Q_i]

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Formula

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Influent BOD given Oxygen Demand of Biomass

Formula

Q i = Q b + (\frac{f \cdot (O 2 + (D O2 \cdot Q w \cdot X R))}{Q s})

Example

15.2 mg/L = 7.1402 mg/L + (\frac{3.0 \cdot (2.5 mg/d + (2.02 \cdot 9.5 m³/s \cdot 1.4 mg/L))}{10 m³/s})

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Influent BOD given Oxygen Demand of Biomass Solution

STEP 0: Pre-Calculation Summary

Formula Used

Influent BOD = Effluent BOD given Oxygen Demand of Biomass+((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 Discharge)
Q_i = Q_b+((f*(O₂+(D^O2*Q_w*X^R)))/Q_s)
This formula uses 8 Variables

Variables Used

Influent BOD - (Measured in Kilogram per Cubic Meter) - Influent BOD is the total amount of BOD which is present in the incoming sewage.
Effluent BOD given Oxygen Demand of Biomass - (Measured in Kilogram per Cubic Meter) - Effluent BOD given Oxygen Demand of Biomass is the amount of oxygen that is consumed by the microbial population in the effluent to decompose organic matter present.
Ratio of BOD to Ultimate BOD - Ratio of BOD to Ultimate BOD is the ratio of 5 days bod to ultimate bod.
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.
Oxygen Demand of Biomass - Oxygen Demand of Biomass is the amount of oxygen required by the microorganisms to decompose organic matter present in biomass.
Volume of Wasted Sludge per day - (Measured in Cubic Meter per Second) - Volume of Wasted Sludge per day is the amount of sludge that is removed or wasted from a wastewater treatment process on a daily basis.
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 liter.
Sewage Discharge - (Measured in Cubic Meter per Second) - Sewage Discharge is the flow rate of sewage when it is being discharged in the river.

STEP 1: Convert Input(s) to Base Unit

Effluent BOD given Oxygen Demand of Biomass: 7.1402 Milligram per Liter --> 0.0071402 Kilogram per Cubic Meter (Check conversion here)
Ratio of BOD to Ultimate BOD: 3 --> No Conversion Required
Theoretical Oxygen Requirement: 2.5 Milligram per Day --> 2.89351851851852E-11 Kilogram per Second (Check conversion here)
Oxygen Demand of Biomass: 2.02 --> No Conversion Required
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: 1.4 Milligram per Liter --> 0.0014 Kilogram per Cubic Meter (Check conversion here)
Sewage Discharge: 10 Cubic Meter per Second --> 10 Cubic Meter per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Q_i = Q_b+((f*(O₂+(D^O2*Q_w*X^R)))/Q_s) --> 0.0071402+((3*(2.89351851851852E-11+(2.02*9.5*0.0014)))/10)

Evaluating ... ...

Q_i = 0.0152000000086806

STEP 3: Convert Result to Output's Unit

0.0152000000086806 Kilogram per Cubic Meter -->15.2000000086806 Milligram per Liter (Check conversion here)

FINAL ANSWER

15.2000000086806 ≈ 15.2 Milligram per Liter <-- Influent BOD

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Environmental Engineering » Treatment of Sewage » Oxygen Requirement of the Aeration Tanks » Influent BOD » Influent BOD given Oxygen Demand of Biomass

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< Influent BOD Calculators

Influent BOD given Oxygen Demand and Ultimate BOD Both

Go Influent BOD = Effluent BOD given Oxygen Demand and Ultimate 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 Discharge)

Influent BOD given Oxygen Demand of Biomass

Go Influent BOD = Effluent BOD given Oxygen Demand of Biomass+((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 Discharge)

Influent BOD given Ultimate BOD

Go Influent BOD = Effluent BOD given Ultimate BOD+(((5 Days BOD/Ultimate BOD)*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge)))/Sewage Discharge)

Influent BOD given Oxygen Required in Aeration Tank

Go Influent BOD = Effluent BOD given Oxygen Required+((Ratio of BOD to Ultimate BOD*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge)))/Sewage Discharge)

Influent BOD given Oxygen Demand of Biomass Formula

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 Influent BOD given Oxygen Demand of Biomass?

Influent BOD given Oxygen Demand of Biomass calculator uses Influent BOD = Effluent BOD given Oxygen Demand of Biomass+((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 Discharge) to calculate the Influent BOD, The Influent BOD given Oxygen Demand of Biomass formula is defined as the calculation of influent BOD when we have prior information of oxygen demand of biomass. Influent BOD is denoted by Q_i symbol.

How to calculate Influent BOD given Oxygen Demand of Biomass using this online calculator? To use this online calculator for Influent BOD given Oxygen Demand of Biomass, enter Effluent BOD given Oxygen Demand of Biomass (Q_b), Ratio of BOD to Ultimate BOD (f), Theoretical Oxygen Requirement (O₂), Oxygen Demand of Biomass (D^O2), Volume of Wasted Sludge per day (Q_w), MLSS in Returned or Wasted Sludge (X^R) & Sewage Discharge (Q_s) and hit the calculate button. Here is how the Influent BOD given Oxygen Demand of Biomass calculation can be explained with given input values -> 13200 = 0.0071402+((3*(2.89351851851852E-11+(2.02*9.5*0.0014)))/10).

FAQ

What is Influent BOD given Oxygen Demand of Biomass?

The Influent BOD given Oxygen Demand of Biomass formula is defined as the calculation of influent BOD when we have prior information of oxygen demand of biomass and is represented as Q_i = Q_b+((f*(O₂+(D^O2*Q_w*X^R)))/Q_s) or Influent BOD = Effluent BOD given Oxygen Demand of Biomass+((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 Discharge). Effluent BOD given Oxygen Demand of Biomass is the amount of oxygen that is consumed by the microbial population in the effluent to decompose organic matter present, Ratio of BOD to Ultimate BOD is the ratio of 5 days bod to ultimate bod, Theoretical Oxygen Requirement is the calculated amount of oxygen required to oxidize a compound to its final oxidation products, Oxygen Demand of Biomass is the amount of oxygen required by the microorganisms to decompose organic matter present in biomass, Volume of Wasted Sludge per day is the amount of sludge that is removed or wasted from a wastewater treatment process on a daily basis, MLSS in Returned or Wasted Sludge is the mixed liquor suspended solids in returned sludge in terms of mg per liter & Sewage Discharge is the flow rate of sewage when it is being discharged in the river.

How to calculate Influent BOD given Oxygen Demand of Biomass?

The Influent BOD given Oxygen Demand of Biomass formula is defined as the calculation of influent BOD when we have prior information of oxygen demand of biomass is calculated using Influent BOD = Effluent BOD given Oxygen Demand of Biomass+((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 Discharge). To calculate Influent BOD given Oxygen Demand of Biomass, you need Effluent BOD given Oxygen Demand of Biomass (Q_b), Ratio of BOD to Ultimate BOD (f), Theoretical Oxygen Requirement (O₂), Oxygen Demand of Biomass (D^O2), Volume of Wasted Sludge per day (Q_w), MLSS in Returned or Wasted Sludge (X^R) & Sewage Discharge (Q_s). With our tool, you need to enter the respective value for Effluent BOD given Oxygen Demand of Biomass, 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 Discharge 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 Influent BOD?

In this formula, Influent BOD uses Effluent BOD given Oxygen Demand of Biomass, 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 Discharge. We can use 3 other way(s) to calculate the same, which is/are as follows -

Influent BOD = Effluent BOD given Oxygen Required+((Ratio of BOD to Ultimate BOD*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge)))/Sewage Discharge)
Influent BOD = Effluent BOD given Ultimate BOD+(((5 Days BOD/Ultimate BOD)*(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge)))/Sewage Discharge)
Influent BOD = Effluent BOD given Oxygen Demand and Ultimate 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 Discharge)

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