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Oxygen Required in Aeration Tank Calculator

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

✖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 [Q_i]			+10% -10%
✖Effluent BOD is the amount of BOD present in the outing sewage.ⓘ Effluent BOD [Q]			+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%
✖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%

✖Oxygen Required in Aeration Tank is the amount of oxygen needed to sustain the aerobic microbial activity that breaks down organic matter in the wastewater.ⓘ Oxygen Required in Aeration Tank [O_a]

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Formula

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Oxygen Required in Aeration Tank

Formula

O a = (\frac{Q s \cdot (Q i - Q)}{f}) - (1.42 \cdot Q w \cdot X R)

Example

0.023781 mg/d = (\frac{10 m³/s \cdot (13.2 mg/L - 0.4 mg/L)}{3.0}) - (1.42 \cdot 9.5 m³/s \cdot 1.4 mg/L)

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Oxygen Required in Aeration Tank Solution

STEP 0: Pre-Calculation Summary

Formula Used

Oxygen Required in Aeration Tank = ((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-(1.42*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge)
O_a = ((Q_s*(Q_i-Q))/f)-(1.42*Q_w*X^R)
This formula uses 7 Variables

Variables Used

Oxygen Required in Aeration Tank - (Measured in Milligram per Day) - Oxygen Required in Aeration Tank is the amount of oxygen needed to sustain the aerobic microbial activity that breaks down organic matter in the wastewater.
Sewage Discharge - (Measured in Cubic Meter per Second) - Sewage Discharge is the flow rate of sewage when it is being discharged in the river.
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 - (Measured in Kilogram per Cubic Meter) - Effluent BOD is the amount of BOD present in the outing sewage.
Ratio of BOD to Ultimate BOD - Ratio of BOD to Ultimate BOD is the ratio of 5 days bod to ultimate bod.
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.

STEP 1: Convert Input(s) to Base Unit

Sewage Discharge: 10 Cubic Meter per Second --> 10 Cubic Meter per Second No Conversion Required
Influent BOD: 13.2 Milligram per Liter --> 0.0132 Kilogram per Cubic Meter (Check conversion here)
Effluent BOD: 0.4 Milligram per Liter --> 0.0004 Kilogram per Cubic Meter (Check conversion here)
Ratio of BOD to Ultimate BOD: 3 --> 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)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

O_a = ((Q_s*(Q_i-Q))/f)-(1.42*Q_w*X^R) --> ((10*(0.0132-0.0004))/3)-(1.42*9.5*0.0014)

Evaluating ... ...

O_a = 0.0237806666666667

STEP 3: Convert Result to Output's Unit

2.75239197530864E-13 Kilogram per Second -->0.0237806666666667 Milligram per Day (Check conversion here)

FINAL ANSWER

0.0237806666666667 ≈ 0.023781 Milligram per Day <-- Oxygen Required in Aeration Tank

(Calculation completed in 00.004 seconds)

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< Oxygen Required in Aeration Tank Calculators

Oxygen Required in Aeration Tank given Oxygen Demand and Ultimate BOD

Go Oxygen Required = ((Sewage Discharge*(Influent BOD-Effluent BOD))/(5 Days BOD/Ultimate BOD))-(Oxygen Demand of Biomass*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge)

Oxygen Required in Aeration Tank given Oxygen Demand of Biomass

Go Oxygen Required in Aeration Tank = ((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-(Oxygen Demand of Biomass*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge)

Oxygen Required in Aeration Tank given Ultimate BOD

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

Oxygen Required in Aeration Tank

Go Oxygen Required in Aeration Tank = ((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-(1.42*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge)

< Important Formulas of Oxygen Requirement of the Aeration Tank Calculators

BOD5 given Oxygen Required in Aeration Tank

Go BOD5 given Oxygen Required in Aeration Tank = Ultimate BOD*(Sewage Discharge*(Influent BOD-Effluent BOD))/(Theoretical Oxygen Requirement+(1.42*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge))

BOD5 given Ratio of BOD to Ultimate BOD

Go BOD5 given Ratio of BOD to Ultimate BOD = Ratio of BOD to Ultimate BOD*Ultimate BOD

Ratio of BOD to Ultimate BOD

Go Ratio of BOD to Ultimate BOD = BOD of 5 days at 20° C/Ultimate BOD

BOD5 when Ratio of BOD to Ultimate BOD is 0.68

Go 5 Days BOD = Ultimate BOD*0.68

Oxygen Required in Aeration Tank Formula

What is Aeration Tank?

Aeration tank where air (or oxygen) is injected in the mixed liquor. Settling tank (usually referred to as "final clarifier" or "secondary settling tank") to allow the biological flocs (the sludge blanket) to settle, thus separating the biological sludge from the clear treated water.

How to Calculate Oxygen Required in Aeration Tank?

Oxygen Required in Aeration Tank calculator uses Oxygen Required in Aeration Tank = ((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-(1.42*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge) to calculate the Oxygen Required in Aeration Tank, The Oxygen Required in Aeration Tank formula is defined as the amount of oxygen needed to sustain the aerobic microbial activity that breaks down organic matter in the wastewater. This is a critical aspect of the biological treatment process where microorganisms utilize oxygen to metabolize organic pollutants, converting them into carbon dioxide, water, and biomass (sludge). Oxygen Required in Aeration Tank is denoted by O_a symbol.

How to calculate Oxygen Required in Aeration Tank using this online calculator? To use this online calculator for Oxygen Required in Aeration Tank, enter Sewage Discharge (Q_s), Influent BOD (Q_i), Effluent BOD (Q), Ratio of BOD to Ultimate BOD (f), Volume of Wasted Sludge per day (Q_w) & MLSS in Returned or Wasted Sludge (X^R) and hit the calculate button. Here is how the Oxygen Required in Aeration Tank calculation can be explained with given input values -> 2.1E+9 = ((10*(0.0132-0.0004))/3)-(1.42*9.5*0.0014).

FAQ

What is Oxygen Required in Aeration Tank?

The Oxygen Required in Aeration Tank formula is defined as the amount of oxygen needed to sustain the aerobic microbial activity that breaks down organic matter in the wastewater. This is a critical aspect of the biological treatment process where microorganisms utilize oxygen to metabolize organic pollutants, converting them into carbon dioxide, water, and biomass (sludge) and is represented as O_a = ((Q_s*(Q_i-Q))/f)-(1.42*Q_w*X^R) or Oxygen Required in Aeration Tank = ((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-(1.42*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge). Sewage Discharge is the flow rate of sewage when it is being discharged in the river, Influent BOD is the total amount of BOD which is present in the incoming sewage, Effluent BOD is the amount of BOD present in the outing sewage, Ratio of BOD to Ultimate BOD is the ratio of 5 days bod to ultimate bod, 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.

How to calculate Oxygen Required in Aeration Tank?

The Oxygen Required in Aeration Tank formula is defined as the amount of oxygen needed to sustain the aerobic microbial activity that breaks down organic matter in the wastewater. This is a critical aspect of the biological treatment process where microorganisms utilize oxygen to metabolize organic pollutants, converting them into carbon dioxide, water, and biomass (sludge) is calculated using Oxygen Required in Aeration Tank = ((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-(1.42*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge). To calculate Oxygen Required in Aeration Tank, you need Sewage Discharge (Q_s), Influent BOD (Q_i), Effluent BOD (Q), Ratio of BOD to Ultimate BOD (f), Volume of Wasted Sludge per day (Q_w) & MLSS in Returned or Wasted Sludge (X^R). With our tool, you need to enter the respective value for Sewage Discharge, Influent BOD, Effluent BOD, Ratio of BOD to Ultimate BOD, Volume of Wasted Sludge per day & MLSS in Returned or Wasted Sludge 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 Oxygen Required in Aeration Tank?

In this formula, Oxygen Required in Aeration Tank uses Sewage Discharge, Influent BOD, Effluent BOD, Ratio of BOD to Ultimate BOD, Volume of Wasted Sludge per day & MLSS in Returned or Wasted Sludge. We can use 1 other way(s) to calculate the same, which is/are as follows -

Oxygen Required in Aeration Tank = ((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-(Oxygen Demand of Biomass*Volume of Wasted Sludge per day*MLSS in Returned or Wasted Sludge)

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