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Oxygen Required in Aeration Tank Formula

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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. Check FAQs

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

O_a - Oxygen Required in Aeration Tank?Q_s - Sewage Discharge?Q_i - Influent BOD?Q - Effluent BOD?f - Ratio of BOD to Ultimate BOD?Q_w - Volume of Wasted Sludge per day?X^R - MLSS in Returned or Wasted Sludge?

Oxygen Required in Aeration Tank Example

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Here is how the Oxygen Required in Aeration Tank equation looks like with Values.

Here is how the Oxygen Required in Aeration Tank equation looks like with Units.

Here is how the Oxygen Required in Aeration Tank equation looks like.

0.0238 = (\frac{10 \cdot (13.2 - 0.4)}{3}) - (1.42 \cdot 9.5 \cdot 1.4)

0.0238mg/d = (\frac{10m³/s \cdot (13.2mg/L - 0.4mg/L)}{3}) - (1.42 \cdot 9.5m³/s \cdot 1.4mg/L)

0.0238 = (\frac{10 \cdot (13.2 - 0.4)}{3}) - (1.42 \cdot 9.5 \cdot 1.4)

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Oxygen Required in Aeration Tank Solution

Follow our step by step solution on how to calculate Oxygen Required in Aeration Tank?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

O a = (\frac{10m³/s \cdot (13.2mg/L - 0.4mg/L)}{3}) - (1.42 \cdot 9.5m³/s \cdot 1.4mg/L)

Next Step Convert Units

∴

O a = (\frac{10m³/s \cdot (0.0132kg/m³ - 0.0004kg/m³)}{3}) - (1.42 \cdot 9.5m³/s \cdot 0.0014kg/m³)

Next Step Prepare to Evaluate

∴

O a = (\frac{10 \cdot (0.0132 - 0.0004)}{3}) - (1.42 \cdot 9.5 \cdot 0.0014)

Next Step Evaluate

∴

O a = 2.75239197530864E-13kg/s

Next Step Convert to Output's Unit

∴

O a = 0.0237806666666667mg/d

LAST Step Rounding Answer

∴

O a = 0.0238mg/d

Oxygen Required in Aeration Tank Formula Elements

Variables

Oxygen Required in Aeration Tank

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.

Symbol: O_a

Measurement: Mass Flow RateUnit: mg/d

Note: Value should be greater than 0.

Formulas to find Oxygen Required in Aeration Tank

Sewage Discharge

Sewage Discharge is the flow rate of sewage when it is being discharged in the river.

Symbol: Q_s

Measurement: Volumetric Flow RateUnit: m³/s

Note: Value should be greater than 0.

Formulas to find Sewage Discharge

Influent BOD

Influent BOD is the total amount of BOD which is present in the incoming sewage.

Symbol: Q_i

Measurement: DensityUnit: mg/L

Note: Value should be greater than 0.

Formulas to find Influent BOD

Effluent BOD

Effluent BOD is the amount of BOD present in the outing sewage.

Symbol: Q

Measurement: DensityUnit: mg/L

Note: Value should be greater than 0.

Formulas to find Effluent BOD

Ratio of BOD to Ultimate BOD

Ratio of BOD to Ultimate BOD is the ratio of 5 days bod to ultimate bod.

Symbol: f

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Ratio of BOD to Ultimate BOD

Volume of Wasted Sludge per day

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.

Symbol: Q_w

Measurement: Volumetric Flow RateUnit: m³/s

Note: Value should be greater than 0.

Formulas to find Volume of Wasted Sludge per day

MLSS in Returned or Wasted Sludge

MLSS in Returned or Wasted Sludge is the mixed liquor suspended solids in returned sludge in terms of mg per liter.

Symbol: X^R

Measurement: DensityUnit: mg/L

Note: Value should be greater than 0.

Formulas to find MLSS in Returned or Wasted Sludge

Other formulas in Oxygen Required in Aeration Tank category

Go Ratio of BOD to Ultimate BOD

f = \frac{BOD 5}{BOD u}

Go BOD5 given Oxygen Required in Aeration Tank

BOD 5a = BOD u \cdot \frac{Q s \cdot (Q i - Q)}{O 2 + (1.42 \cdot Q w \cdot X R)}

How to Evaluate Oxygen Required in Aeration Tank?

Oxygen Required in Aeration Tank evaluator 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 evaluate the Oxygen Required in Aeration Tank, Oxygen Required in Aeration Tank formula is defined as the amount of oxygen required to remove the organic matter from the wastewater in an aeration tank, which is a critical component of the biological treatment process in wastewater treatment plants, and is essential to maintain a healthy ecosystem. Oxygen Required in Aeration Tank is denoted by O_a symbol.

How to evaluate Oxygen Required in Aeration Tank using this online evaluator? To use this online evaluator 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.

FAQs on Oxygen Required in Aeration Tank

What is the formula to find Oxygen Required in Aeration Tank?

The formula of Oxygen Required in Aeration Tank is expressed as 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). Here is an example- 2.1E+9 = ((10*(0.0132-0.0004))/3)-(1.42*9.5*0.0014).

How to calculate Oxygen Required in Aeration Tank?

With 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) we can find Oxygen Required in Aeration Tank using the formula - 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).

Can the Oxygen Required in Aeration Tank be negative?

No, the Oxygen Required in Aeration Tank, measured in Mass Flow Rate cannot be negative.

Which unit is used to measure Oxygen Required in Aeration Tank?

Oxygen Required in Aeration Tank is usually measured using the Milligram per Day[mg/d] for Mass Flow Rate. Kilogram per Second[mg/d], Gram per Second[mg/d], Gram per Hour[mg/d] are the few other units in which Oxygen Required in Aeration Tank can be measured.

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Oxygen Required in Aeration Tank Formula

Oxygen Required in Aeration Tank Example

Oxygen Required in Aeration Tank Solution

Oxygen Required in Aeration Tank Formula Elements

Other formulas in Oxygen Required in Aeration Tank category

How to Evaluate Oxygen Required in Aeration Tank?

FAQs on Oxygen Required in Aeration Tank

Variable Name