MLSS given RAS Pumping Rate from Aeration Tank Calculator

✖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.ⓘ Sludge Concentration in Return Line [X_r]			+10% -10%
✖Return Activated Sludge MLSS MLVSS refers to the portion of the activated sludge that is returned from the secondary clarifier to the aeration tank.ⓘ Return Activated Sludge MLSS MLVSS [Q_r]			+10% -10%
✖WAS Pumping Rate from Return Line mlss is the flow rate of waste sludge from the return line.ⓘ WAS Pumping Rate from Return Line mlss [Q]			+10% -10%
✖Average Daily Influent Flow Rate is the total discharge that comes in the reactor.ⓘ Average Daily Influent Flow Rate [Q_a]			+10% -10%

✖Mixed Liquor Suspended Solids refers to the concentration of suspended solids in the mixed liquor of an aeration tank during the activated sludge process.ⓘ MLSS given RAS Pumping Rate from Aeration Tank [X^']

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MLSS given RAS Pumping Rate from Aeration Tank Solution

STEP 0: Pre-Calculation Summary

Formula Used

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)
X^' = X_r*(Q_r+Q)/(Q_a+Q_r)
This formula uses 5 Variables

Variables Used

Mixed Liquor Suspended Solids - (Measured in Kilogram per Cubic Meter) - Mixed Liquor Suspended Solids refers to the concentration of suspended solids in the mixed liquor of an aeration tank during the activated sludge process.
Sludge Concentration in Return Line - (Measured in Kilogram per Cubic Meter) - 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.
Return Activated Sludge MLSS MLVSS - (Measured in Cubic Meter per Second) - Return Activated Sludge MLSS MLVSS refers to the portion of the activated sludge that is returned from the secondary clarifier to the aeration tank.
WAS Pumping Rate from Return Line mlss - (Measured in Cubic Meter per Second) - WAS Pumping Rate from Return Line mlss is the flow rate of waste sludge from the return line.
Average Daily Influent Flow Rate - (Measured in Cubic Meter per Second) - Average Daily Influent Flow Rate is the total discharge that comes in the reactor.

STEP 1: Convert Input(s) to Base Unit

Sludge Concentration in Return Line: 200 Milligram per Liter --> 0.2 Kilogram per Cubic Meter (Check conversion here)
Return Activated Sludge MLSS MLVSS: 81 Cubic Meter per Day --> 0.0009375 Cubic Meter per Second (Check conversion here)
WAS Pumping Rate from Return Line mlss: 300 Cubic Meter per Day --> 0.00347222222222222 Cubic Meter per Second (Check conversion here)
Average Daily Influent Flow Rate: 1.2 Cubic Meter per Day --> 1.38888888888889E-05 Cubic Meter per Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

X^' = X_r*(Q_r+Q)/(Q_a+Q_r) --> 0.2*(0.0009375+0.00347222222222222)/(1.38888888888889E-05+0.0009375)

Evaluating ... ...

X^' = 0.927007299270072

STEP 3: Convert Result to Output's Unit

0.927007299270072 Kilogram per Cubic Meter -->927.007299270072 Milligram per Liter (Check conversion here)

FINAL ANSWER

927.007299270072 ≈ 927.0073 Milligram per Liter <-- Mixed Liquor Suspended Solids

(Calculation completed in 00.020 seconds)

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Meerut Institute of Engineering and Technology (MIET), Meerut

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< MLSS and MLVSS Calculators

Mixed Liquor Volatile Suspended Solids given Reactor Volume

LaTeX Go Mixed Liquor Volatile Suspended Solids = (Mean Cell Residence Time*Average Daily Influent Flow Rate*Maximum Yield Coefficient*(MLVSS-Effluent Substrate Concentration))/(Reactor Volume*(1+(Endogenous Decay Coefficient*Mean Cell Residence Time)))

Mixed Liquor Suspended Solids given Wasting Rate from Return Line

LaTeX Go 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

MLSS given RAS Pumping Rate from Aeration Tank

LaTeX Go 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)

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

LaTeX Go Mixed Liquor Suspended Solids = Mean Cell Residence Time*WAS Pumping Rate from Return Line mlss*Sludge Concentration in Return Line/Reactor Volume

MLSS given RAS Pumping Rate from Aeration Tank Formula

LaTeX Go

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 MLSS given RAS Pumping Rate from Aeration Tank?

MLSS given RAS Pumping Rate from Aeration Tank calculator 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 calculate 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 calculate MLSS given RAS Pumping Rate from Aeration Tank using this online calculator? To use this online calculator 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. Here is how the MLSS given RAS Pumping Rate from Aeration Tank calculation can be explained with given input values -> 927007.3 = 0.2*(0.0009375+0.00347222222222222)/(1.38888888888889E-05+0.0009375).

FAQ

What is MLSS given RAS Pumping Rate from Aeration Tank?

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 and is represented as X^' = X_r*(Q_r+Q)/(Q_a+Q_r) or 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). 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, Return Activated Sludge MLSS MLVSS refers to the portion of the activated sludge that is returned from the secondary clarifier to the aeration tank, WAS Pumping Rate from Return Line mlss is the flow rate of waste sludge from the return line & Average Daily Influent Flow Rate is the total discharge that comes in the reactor.

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

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 is calculated using 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 calculate MLSS given RAS Pumping Rate from Aeration Tank, you need 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). With our tool, you need to enter the respective value for Sludge Concentration in Return Line, Return Activated Sludge MLSS MLVSS, WAS Pumping Rate from Return Line mlss & Average Daily Influent Flow Rate 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 Mixed Liquor Suspended Solids?

In this formula, Mixed Liquor Suspended Solids uses Sludge Concentration in Return Line, Return Activated Sludge MLSS MLVSS, WAS Pumping Rate from Return Line mlss & Average Daily Influent Flow Rate. We can use 2 other way(s) to calculate the same, which is/are as follows -

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

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