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MLSS Returned given Oxygen Required in Aeration Tank Formula

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

X R = \frac{(\frac{Q s \cdot (Q i - Q o)}{f}) - O 2}{1.42 \cdot Q w}

X^R - MLSS in Returned or Wasted Sludge?Q_s - Sewage Discharge?Q_i - Influent BOD?Q_o - Effluent BOD given Oxygen Required?f - Ratio of BOD to Ultimate BOD?O₂ - Theoretical Oxygen Requirement?Q_w - Volume of Wasted Sludge per day?

MLSS Returned given Oxygen Required in Aeration Tank Example

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

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

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

0.9291 = \frac{(\frac{10 \cdot (13.2 - 9.44)}{3}) - 2.5}{1.42 \cdot 9.5}

0.9291mg/L = \frac{(\frac{10m³/s \cdot (13.2mg/L - 9.44mg/L)}{3}) - 2.5mg/d}{1.42 \cdot 9.5m³/s}

0.9291 = \frac{(\frac{10 \cdot (13.2 - 9.44)}{3}) - 2.5}{1.42 \cdot 9.5}

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MLSS Returned given Oxygen Required in Aeration Tank Solution

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

FIRST Step Consider the formula

X R = \frac{(\frac{Q s \cdot (Q i - Q o)}{f}) - O 2}{1.42 \cdot Q w}

Next Step Substitute values of Variables

∴

X R = \frac{(\frac{10m³/s \cdot (13.2mg/L - 9.44mg/L)}{3}) - 2.5mg/d}{1.42 \cdot 9.5m³/s}

Next Step Convert Units

∴

X R = \frac{(\frac{10m³/s \cdot (0.0132kg/m³ - 0.0094kg/m³)}{3}) - 2.9E-11kg/s}{1.42 \cdot 9.5m³/s}

Next Step Prepare to Evaluate

∴

X R = \frac{(\frac{10 \cdot (0.0132 - 0.0094)}{3}) - 2.9E-11}{1.42 \cdot 9.5}

Next Step Evaluate

∴

X R = 0.000929083269414244kg/m³

Next Step Convert to Output's Unit

∴

X R = 0.929083269414244mg/L

LAST Step Rounding Answer

∴

X R = 0.9291mg/L

MLSS Returned given Oxygen Required in Aeration Tank Formula Elements

Variables

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

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 given Oxygen Required

Effluent BOD given Oxygen Required in Aeration Tank is the amount of biodegradable organic matter in the treated wastewater.

Symbol: Q_o

Measurement: DensityUnit: mg/L

Note: Value should be greater than 0.

Formulas to find Effluent BOD given Oxygen Required

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

Theoretical Oxygen Requirement

Theoretical Oxygen Requirement is the calculated amount of oxygen required to oxidize a compound to its final oxidation products.

Symbol: O₂

Measurement: Mass Flow RateUnit: mg/d

Note: Value should be greater than 0.

Formulas to find Theoretical Oxygen Requirement

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

Other formulas in MLSS Returned 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 MLSS Returned given Oxygen Required in Aeration Tank?

MLSS Returned given Oxygen Required in Aeration Tank evaluator uses MLSS in Returned or Wasted Sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD given Oxygen Required))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(1.42*Volume of Wasted Sludge per day) to evaluate the MLSS in Returned or Wasted Sludge, MLSS Returned given Oxygen Required in Aeration Tank formula is defined as a measure of the mass of suspended solids in a mixture of wastewater and activated sludge, which is essential in determining the oxygen requirement for the aeration tank in wastewater treatment processes. MLSS in Returned or Wasted Sludge is denoted by X^R symbol.

How to evaluate MLSS Returned given Oxygen Required in Aeration Tank using this online evaluator? To use this online evaluator for MLSS Returned given Oxygen Required in Aeration Tank, enter Sewage Discharge (Q_s), Influent BOD (Q_i), Effluent BOD given Oxygen Required (Q_o), Ratio of BOD to Ultimate BOD (f), Theoretical Oxygen Requirement (O₂) & Volume of Wasted Sludge per day (Q_w) and hit the calculate button.

FAQs on MLSS Returned given Oxygen Required in Aeration Tank

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

The formula of MLSS Returned given Oxygen Required in Aeration Tank is expressed as MLSS in Returned or Wasted Sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD given Oxygen Required))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(1.42*Volume of Wasted Sludge per day). Here is an example- 1400.049 = (((10*(0.0132-0.00944))/3)-2.89351851851852E-11)/(1.42*9.5).

How to calculate MLSS Returned given Oxygen Required in Aeration Tank?

With Sewage Discharge (Q_s), Influent BOD (Q_i), Effluent BOD given Oxygen Required (Q_o), Ratio of BOD to Ultimate BOD (f), Theoretical Oxygen Requirement (O₂) & Volume of Wasted Sludge per day (Q_w) we can find MLSS Returned given Oxygen Required in Aeration Tank using the formula - MLSS in Returned or Wasted Sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD given Oxygen Required))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(1.42*Volume of Wasted Sludge per day).

Can the MLSS Returned given Oxygen Required in Aeration Tank be negative?

No, the MLSS Returned given Oxygen Required in Aeration Tank, measured in Density cannot be negative.

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

MLSS Returned given Oxygen Required in Aeration Tank is usually measured using the Milligram per Liter[mg/L] for Density. Kilogram per Cubic Meter[mg/L], Kilogram per Cubic Centimeter[mg/L], Gram per Cubic Meter[mg/L] are the few other units in which MLSS Returned given Oxygen Required in Aeration Tank can be measured.

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MLSS Returned given Oxygen Required in Aeration Tank Formula

MLSS Returned given Oxygen Required in Aeration Tank Example

MLSS Returned given Oxygen Required in Aeration Tank Solution

MLSS Returned given Oxygen Required in Aeration Tank Formula Elements

Other formulas in MLSS Returned category

How to Evaluate MLSS Returned given Oxygen Required in Aeration Tank?

FAQs on MLSS Returned given Oxygen Required in Aeration Tank

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