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MLSS Returned given Oxygen Demand of Biomass Formula

GoMLSS Returned given Oxygen Required in Aeration Tank Formula

GoMLSS Returned given Ultimate BOD 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 b)}{f}) - O 2}{D O2 \cdot Q w}

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

MLSS Returned given Oxygen Demand of Biomass Example

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Here is how the MLSS Returned given Oxygen Demand of Biomass equation looks like with Values.

Here is how the MLSS Returned given Oxygen Demand of Biomass equation looks like with Units.

Here is how the MLSS Returned given Oxygen Demand of Biomass equation looks like.

1.0526 = \frac{(\frac{10 \cdot (13.2 - 7.1402)}{3}) - 2.5}{2.02 \cdot 9.5}

1.0526mg/L = \frac{(\frac{10m³/s \cdot (13.2mg/L - 7.1402mg/L)}{3}) - 2.5mg/d}{2.02 \cdot 9.5m³/s}

1.0526 = \frac{(\frac{10 \cdot (13.2 - 7.1402)}{3}) - 2.5}{2.02 \cdot 9.5}

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MLSS Returned given Oxygen Demand of Biomass Solution

Follow our step by step solution on how to calculate MLSS Returned given Oxygen Demand of Biomass?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

X R = \frac{(\frac{10m³/s \cdot (13.2mg/L - 7.1402mg/L)}{3}) - 2.5mg/d}{2.02 \cdot 9.5m³/s}

Next Step Convert Units

∴

X R = \frac{(\frac{10m³/s \cdot (0.0132kg/m³ - 0.0071kg/m³)}{3}) - 2.9E-11kg/s}{2.02 \cdot 9.5m³/s}

Next Step Prepare to Evaluate

∴

X R = \frac{(\frac{10 \cdot (0.0132 - 0.0071)}{3}) - 2.9E-11}{2.02 \cdot 9.5}

Next Step Evaluate

∴

X R = 0.00105259683712341kg/m³

Next Step Convert to Output's Unit

∴

X R = 1.05259683712341mg/L

LAST Step Rounding Answer

∴

X R = 1.0526mg/L

MLSS Returned given Oxygen Demand of Biomass 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 Demand of Biomass

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.

Symbol: Q_b

Measurement: DensityUnit: mg/L

Note: Value should be greater than 0.

Formulas to find Effluent BOD given Oxygen Demand of Biomass

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

Oxygen Demand of Biomass

Oxygen Demand of Biomass is the amount of oxygen required by the microorganisms to decompose organic matter present in biomass.

Symbol: D^O2

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Oxygen Demand of Biomass

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 to find MLSS in Returned or Wasted Sludge

Go MLSS Returned given Oxygen Required in Aeration Tank

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

Go MLSS Returned given Ultimate BOD

X R = \frac{(\frac{Q s \cdot (Q i - Q ub)}{\frac{BOD5}{BOD u}}) - O 2}{1.42 \cdot Q w}

How to Evaluate MLSS Returned given Oxygen Demand of Biomass?

MLSS Returned given Oxygen Demand of Biomass evaluator uses MLSS in Returned or Wasted Sludge = (((Sewage Discharge*(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) to evaluate the MLSS in Returned or Wasted Sludge, The MLSS Returned given Oxygen Demand of Biomass formula is defined as the calculation of value ok MLSS when we have prior information of oxygen demand of biomass. MLSS in Returned or Wasted Sludge is denoted by X^R symbol.

How to evaluate MLSS Returned given Oxygen Demand of Biomass using this online evaluator? To use this online evaluator for MLSS Returned given Oxygen Demand of Biomass, enter Sewage Discharge (Q_s), Influent BOD (Q_i), 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) and hit the calculate button.

FAQs on MLSS Returned given Oxygen Demand of Biomass

What is the formula to find MLSS Returned given Oxygen Demand of Biomass?

The formula of MLSS Returned given Oxygen Demand of Biomass is expressed as MLSS in Returned or Wasted Sludge = (((Sewage Discharge*(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). Here is an example- 1400 = (((10*(0.0132-0.0071402))/3)-2.89351851851852E-11)/(2.02*9.5).

How to calculate MLSS Returned given Oxygen Demand of Biomass?

With Sewage Discharge (Q_s), Influent BOD (Q_i), 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) we can find MLSS Returned given Oxygen Demand of Biomass using the formula - MLSS in Returned or Wasted Sludge = (((Sewage Discharge*(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).

What are the other ways to Calculate MLSS in Returned or Wasted Sludge?

Here are the different ways to Calculate MLSS in Returned or Wasted Sludge-

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)
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)

Can the MLSS Returned given Oxygen Demand of Biomass be negative?

No, the MLSS Returned given Oxygen Demand of Biomass, measured in Density cannot be negative.

Which unit is used to measure MLSS Returned given Oxygen Demand of Biomass?

MLSS Returned given Oxygen Demand of Biomass 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 Demand of Biomass can be measured.

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MLSS Returned given Oxygen Demand of Biomass Formula

​GoMLSS Returned given Oxygen Required in Aeration Tank Formula

​GoMLSS Returned given Ultimate BOD Formula

MLSS Returned given Oxygen Demand of Biomass Example

MLSS Returned given Oxygen Demand of Biomass Solution

MLSS Returned given Oxygen Demand of Biomass Formula Elements

Other Formulas to find MLSS in Returned or Wasted Sludge

How to Evaluate MLSS Returned given Oxygen Demand of Biomass?

FAQs on MLSS Returned given Oxygen Demand of Biomass

Variable Name

GoMLSS Returned given Oxygen Required in Aeration Tank Formula

GoMLSS Returned given Ultimate BOD Formula