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MLSS given RAS Pumping Rate from Aeration Tank Formula

GoMixed Liquor Suspended Solids given Wasting Rate from Return Line Formula

GoMLSS using Wasting Rate from Return Line when Concentration of Solid in Effluent is Low Formula

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Mixed Liquor Suspended Solids refers to the concentration of suspended solids in the mixed liquor of an aeration tank during the activated sludge process. Check FAQs

X' = X r \cdot \frac{Q r + Q}{Q a + Q r}

X^' - Mixed Liquor Suspended Solids?X_r - Sludge Concentration in Return Line?Q_r - Return Activated Sludge MLSS MLVSS?Q - WAS Pumping Rate from Return Line mlss?Q_a - Average Daily Influent Flow Rate?

MLSS given RAS Pumping Rate from Aeration Tank Example

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Here is how the MLSS given RAS Pumping Rate from Aeration Tank equation looks like with Values.

Here is how the MLSS given RAS Pumping Rate from Aeration Tank equation looks like with Units.

Here is how the MLSS given RAS Pumping Rate from Aeration Tank equation looks like.

927.0073 = 200 \cdot \frac{81 + 300}{1.2 + 81}

927.0073mg/L = 200mg/L \cdot \frac{81m³/d + 300m³/d}{1.2m³/d + 81m³/d}

927.0073 = 200 \cdot \frac{81 + 300}{1.2 + 81}

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MLSS given RAS Pumping Rate from Aeration Tank Solution

Follow our step by step solution on how to calculate MLSS given RAS Pumping Rate from Aeration Tank?

FIRST Step Consider the formula

X' = X r \cdot \frac{Q r + Q}{Q a + Q r}

Next Step Substitute values of Variables

∴

X' = 200mg/L \cdot \frac{81m³/d + 300m³/d}{1.2m³/d + 81m³/d}

Next Step Convert Units

∴

X' = 0.2kg/m³ \cdot \frac{0.0009m³/s + 0.0035m³/s}{1.4E-5m³/s + 0.0009m³/s}

Next Step Prepare to Evaluate

∴

X' = 0.2 \cdot \frac{0.0009 + 0.0035}{1.4E-5 + 0.0009}

Next Step Evaluate

∴

X' = 0.927007299270072kg/m³

Next Step Convert to Output's Unit

∴

X' = 927.007299270072mg/L

LAST Step Rounding Answer

∴

X' = 927.0073mg/L

MLSS given RAS Pumping Rate from Aeration Tank Formula Elements

Variables

Mixed Liquor Suspended Solids

Mixed Liquor Suspended Solids refers to the concentration of suspended solids in the mixed liquor of an aeration tank during the activated sludge process.

Symbol: X^'

Measurement: DensityUnit: mg/L

Note: Value should be less than 6500.

Formulas to find Mixed Liquor Suspended Solids

Sludge Concentration in Return Line

Sludge Concentration in Return Line refers to the concentration of suspended solids in the sludge that is being pumped back from the secondary clarifier to the aeration tank.

Symbol: X_r

Measurement: DensityUnit: mg/L

Note: Value should be greater than 0.

Formulas to find Sludge Concentration in Return Line

Return Activated Sludge MLSS MLVSS

Return Activated Sludge MLSS MLVSS refers to the portion of the activated sludge that is returned from the secondary clarifier to the aeration tank.

Symbol: Q_r

Measurement: Volumetric Flow RateUnit: m³/d

Note: Value should be greater than 0.

Formulas to find Return Activated Sludge MLSS MLVSS

WAS Pumping Rate from Return Line mlss

WAS Pumping Rate from Return Line mlss is the flow rate of waste sludge from the return line.

Symbol: Q

Measurement: Volumetric Flow RateUnit: m³/d

Note: Value should be greater than 0.

Formulas to find WAS Pumping Rate from Return Line mlss

Average Daily Influent Flow Rate

Average Daily Influent Flow Rate is the total discharge that comes in the reactor.

Symbol: Q_a

Measurement: Volumetric Flow RateUnit: m³/d

Note: Value should be greater than 0.

Formulas to find Average Daily Influent Flow Rate

Other Formulas to find Mixed Liquor Suspended Solids

Go Mixed Liquor Suspended Solids given Wasting Rate from Return Line

X' = θ c \cdot \frac{(Q \cdot X r) + (Q e \cdot X e)}{V}

Go MLSS using Wasting Rate from Return Line when Concentration of Solid in Effluent is Low

X' = θ c \cdot Q \cdot \frac{X r}{V}

Other formulas in MLSS and MLVSS category

Go Mixed Liquor Volatile Suspended Solids given Reactor Volume

X a' = \frac{θ c \cdot Q a \cdot Y \cdot (X a - S)}{V \cdot (1 + (k d \cdot θ c))}

How to Evaluate MLSS given RAS Pumping Rate from Aeration Tank?

MLSS given RAS Pumping Rate from Aeration Tank evaluator uses Mixed Liquor Suspended Solids = Sludge Concentration in Return Line*(Return Activated Sludge MLSS MLVSS+WAS Pumping Rate from Return Line mlss)/(Average Daily Influent Flow Rate+Return Activated Sludge MLSS MLVSS) to evaluate the Mixed Liquor Suspended Solids, The MLSS given RAS Pumping Rate from Aeration Tank formula is defined as the concentration of suspended solids in the mixed liquor of an aeration tank in a wastewater treatment plant using RAS pumping rate as it is crucial for controlling the MLSS concentration in the aeration tank. Mixed Liquor Suspended Solids is denoted by X^' symbol.

How to evaluate MLSS given RAS Pumping Rate from Aeration Tank using this online evaluator? To use this online evaluator for MLSS given RAS Pumping Rate from Aeration Tank, enter Sludge Concentration in Return Line (X_r), Return Activated Sludge MLSS MLVSS (Q_r), WAS Pumping Rate from Return Line mlss (Q) & Average Daily Influent Flow Rate (Q_a) and hit the calculate button.

FAQs on MLSS given RAS Pumping Rate from Aeration Tank

What is the formula to find MLSS given RAS Pumping Rate from Aeration Tank?

The formula of MLSS given RAS Pumping Rate from Aeration Tank is expressed as Mixed Liquor Suspended Solids = Sludge Concentration in Return Line*(Return Activated Sludge MLSS MLVSS+WAS Pumping Rate from Return Line mlss)/(Average Daily Influent Flow Rate+Return Activated Sludge MLSS MLVSS). Here is an example- 927007.3 = 0.2*(0.0009375+0.00347222222222222)/(1.38888888888889E-05+0.0009375).

How to calculate MLSS given RAS Pumping Rate from Aeration Tank?

With Sludge Concentration in Return Line (X_r), Return Activated Sludge MLSS MLVSS (Q_r), WAS Pumping Rate from Return Line mlss (Q) & Average Daily Influent Flow Rate (Q_a) we can find MLSS given RAS Pumping Rate from Aeration Tank using the formula - Mixed Liquor Suspended Solids = Sludge Concentration in Return Line*(Return Activated Sludge MLSS MLVSS+WAS Pumping Rate from Return Line mlss)/(Average Daily Influent Flow Rate+Return Activated Sludge MLSS MLVSS).

What are the other ways to Calculate Mixed Liquor Suspended Solids?

Here are the different ways to Calculate Mixed Liquor Suspended Solids-

Mixed Liquor Suspended Solids=Mean Cell Residence Time*((WAS Pumping Rate from Return Line mlss*Sludge Concentration in Return Line)+(Effluent Flow Rate*Solid Concentration in Effluent))/Reactor Volume
Mixed Liquor Suspended Solids=Mean Cell Residence Time*WAS Pumping Rate from Return Line mlss*Sludge Concentration in Return Line/Reactor Volume

Can the MLSS given RAS Pumping Rate from Aeration Tank be negative?

No, the MLSS given RAS Pumping Rate from Aeration Tank, measured in Density cannot be negative.

Which unit is used to measure MLSS given RAS Pumping Rate from Aeration Tank?

MLSS given RAS Pumping Rate from 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 given RAS Pumping Rate from Aeration Tank can be measured.

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MLSS given RAS Pumping Rate from Aeration Tank Formula

​GoMixed Liquor Suspended Solids given Wasting Rate from Return Line Formula

​GoMLSS using Wasting Rate from Return Line when Concentration of Solid in Effluent is Low Formula

MLSS given RAS Pumping Rate from Aeration Tank Example

MLSS given RAS Pumping Rate from Aeration Tank Solution

MLSS given RAS Pumping Rate from Aeration Tank Formula Elements

Other Formulas to find Mixed Liquor Suspended Solids

Other formulas in MLSS and MLVSS category

How to Evaluate MLSS given RAS Pumping Rate from Aeration Tank?

FAQs on MLSS given RAS Pumping Rate from Aeration Tank

Variable Name

GoMixed Liquor Suspended Solids given Wasting Rate from Return Line Formula

GoMLSS using Wasting Rate from Return Line when Concentration of Solid in Effluent is Low Formula