WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank Solution

STEP 0: Pre-Calculation Summary
Formula Used
WAS Pumping Rate from Return Line = ((MLSS/Sludge Concentration in Return Line)*(Average daily influent flow rate+Return Activated Sludge))-Return Activated Sludge
Qw' = ((X/Xr)*(Q+Qr))-Qr
This formula uses 5 Variables
Variables Used
WAS Pumping Rate from Return Line - (Measured in Cubic Meter per Second) - WAS Pumping Rate from Return Line is the flow rate of waste sludge from the return line.
MLSS - (Measured in Kilogram per Cubic Meter) - MLSS is the sum of volatile suspended solids (organics) and fixed suspended solids (inorganics).
Sludge Concentration in Return Line - (Measured in Kilogram per Cubic Meter) - Sludge Concentration in Return Line is the total BOD that is present in 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.
Return Activated Sludge - (Measured in Cubic Meter per Second) - Return activated sludge flow rate will vary with each installation and with different load factors.
STEP 1: Convert Input(s) to Base Unit
MLSS: 1200 Milligram per Liter --> 1.2 Kilogram per Cubic Meter (Check conversion here)
Sludge Concentration in Return Line: 200 Milligram per Liter --> 0.2 Kilogram per Cubic Meter (Check conversion here)
Average daily influent flow rate: 1.2 Cubic Meter per Day --> 1.38888888888889E-05 Cubic Meter per Second (Check conversion here)
Return Activated Sludge: 10 Cubic Meter per Day --> 0.000115740740740741 Cubic Meter per Second (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Qw' = ((X/Xr)*(Q+Qr))-Qr --> ((1.2/0.2)*(1.38888888888889E-05+0.000115740740740741))-0.000115740740740741
Evaluating ... ...
Qw' = 0.000662037037037038
STEP 3: Convert Result to Output's Unit
0.000662037037037038 Cubic Meter per Second -->57.2000000000001 Cubic Meter per Day (Check conversion here)
FINAL ANSWER
57.2000000000001 57.2 Cubic Meter per Day <-- WAS Pumping Rate from Return Line
(Calculation completed in 00.004 seconds)

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Meerut Institute of Engineering and Technology (MIET), Meerut
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4 WAS Pumping Rate Calculators

WAS Pumping Rate from Return Line given Wasting Rate from Return Line
Go WAS Pumping Rate from Return Line = (Reactor Volume*MLSS/(Mean Cell Residence Time*Sludge Concentration in Return Line))-(Effluent Flow Rate*Solid Concentration in Effluent/Sludge Concentration in Return Line)
WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank
Go WAS Pumping Rate from Return Line = ((MLSS/Sludge Concentration in Return Line)*(Average daily influent flow rate+Return Activated Sludge))-Return Activated Sludge
WAS Pumping Rate using Wasting Rate from Return Line when Concentration of Solid in Effluent is Low
Go WAS Pumping Rate from Return Line = Reactor Volume*MLSS/(Mean Cell Residence Time*Sludge Concentration in Return Line)
WAS Pumping Rate from Aeration Tank
Go WAS Pumping Rate from Reactor = Reactor Volume/Mean Cell Residence Time

WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank Formula

WAS Pumping Rate from Return Line = ((MLSS/Sludge Concentration in Return Line)*(Average daily influent flow rate+Return Activated Sludge))-Return Activated Sludge
Qw' = ((X/Xr)*(Q+Qr))-Qr

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 WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank?

WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank calculator uses WAS Pumping Rate from Return Line = ((MLSS/Sludge Concentration in Return Line)*(Average daily influent flow rate+Return Activated Sludge))-Return Activated Sludge to calculate the WAS Pumping Rate from Return Line, The WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank is the total amount of waste activated sludge which is produced from the return line. WAS Pumping Rate from Return Line is denoted by Qw' symbol.

How to calculate WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank using this online calculator? To use this online calculator for WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank, enter MLSS (X), Sludge Concentration in Return Line (Xr), Average daily influent flow rate (Q) & Return Activated Sludge (Qr) and hit the calculate button. Here is how the WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank calculation can be explained with given input values -> 8.8E+6 = ((1.2/0.2)*(1.38888888888889E-05+0.000115740740740741))-0.000115740740740741.

FAQ

What is WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank?
The WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank is the total amount of waste activated sludge which is produced from the return line and is represented as Qw' = ((X/Xr)*(Q+Qr))-Qr or WAS Pumping Rate from Return Line = ((MLSS/Sludge Concentration in Return Line)*(Average daily influent flow rate+Return Activated Sludge))-Return Activated Sludge. MLSS is the sum of volatile suspended solids (organics) and fixed suspended solids (inorganics), Sludge Concentration in Return Line is the total BOD that is present in the return line, Average daily influent flow rate is the total discharge that comes in the reactor & Return activated sludge flow rate will vary with each installation and with different load factors.
How to calculate WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank?
The WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank is the total amount of waste activated sludge which is produced from the return line is calculated using WAS Pumping Rate from Return Line = ((MLSS/Sludge Concentration in Return Line)*(Average daily influent flow rate+Return Activated Sludge))-Return Activated Sludge. To calculate WAS Pumping Rate from Return Line given RAS Pumping Rate from Aeration Tank, you need MLSS (X), Sludge Concentration in Return Line (Xr), Average daily influent flow rate (Q) & Return Activated Sludge (Qr). With our tool, you need to enter the respective value for MLSS, Sludge Concentration in Return Line, Average daily influent flow rate & Return Activated Sludge 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 WAS Pumping Rate from Return Line?
In this formula, WAS Pumping Rate from Return Line uses MLSS, Sludge Concentration in Return Line, Average daily influent flow rate & Return Activated Sludge. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • WAS Pumping Rate from Return Line = (Reactor Volume*MLSS/(Mean Cell Residence Time*Sludge Concentration in Return Line))-(Effluent Flow Rate*Solid Concentration in Effluent/Sludge Concentration in Return Line)
  • WAS Pumping Rate from Return Line = Reactor Volume*MLSS/(Mean Cell Residence Time*Sludge Concentration in Return Line)
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