Average Daily Influent Flow Rate using Recirculation Ratio Solution

STEP 0: Pre-Calculation Summary
Formula Used
Average daily influent flow rate = Return Activated Sludge/Recirculation Ratio
Q = Qr/α
This formula uses 3 Variables
Variables Used
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.
Recirculation Ratio - Recirculation Ratio is the ratio of the RAS pumping rate to influent flow rate.
STEP 1: Convert Input(s) to Base Unit
Return Activated Sludge: 10 Cubic Meter per Day --> 0.000115740740740741 Cubic Meter per Second (Check conversion here)
Recirculation Ratio: 1.5 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Q = Qr/α --> 0.000115740740740741/1.5
Evaluating ... ...
Q = 7.71604938271607E-05
STEP 3: Convert Result to Output's Unit
7.71604938271607E-05 Cubic Meter per Second -->6.66666666666668 Cubic Meter per Day (Check conversion here)
FINAL ANSWER
6.66666666666668 6.666667 Cubic Meter per Day <-- Average daily influent flow rate
(Calculation completed in 00.004 seconds)

Credits

Created by Ishita Goyal
Meerut Institute of Engineering and Technology (MIET), Meerut
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NSS College of Engineering (NSSCE), Palakkad
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6 Average Daily Influent Flow Rate Calculators

Average Daily Influent Flow Rate given Reactor Volume
Go Average daily influent flow rate = Reactor Volume*MLVSS*(1+(Endogenous decay coefficient*Mean Cell Residence Time))/(Mean Cell Residence Time*Maximum Yield Coefficient*(Influent Substrate Concentration-Effluent substrate concentration))
Average Daily Influent Flow Rate given Theoretical Oxygen Requirement
Go Average daily influent flow rate = (Theoretical Oxygen Requirement+(1.42*Net waste activated sludge))*(BOD conversion factor/(8.34*(Influent Substrate Concentration-Effluent substrate concentration)))
Average Daily Influent Flow Rate given RAS Pumping Rate from Aeration Tank
Go Average daily influent flow rate = ((Sludge Concentration in Return Line/MLSS)*(Return Activated Sludge+WAS Pumping Rate from Return Line))-Return Activated Sludge
Average Daily Influent Flow Rate given Net Waste Activated Sludge
Go Average daily influent flow rate = Net waste activated sludge/(8.34*Observed Cell Yield*(Influent Substrate Concentration-Effluent substrate concentration))
Average Daily Influent Flow Rate using Recirculation Ratio
Go Average daily influent flow rate = Return Activated Sludge/Recirculation Ratio
Average Daily Influent Flow Rate given Hydraulic Retention Time
Go Average daily influent flow rate = Reactor Volume/Hydraulic retention time

Average Daily Influent Flow Rate using Recirculation Ratio Formula

Average daily influent flow rate = Return Activated Sludge/Recirculation Ratio
Q = Qr/α

What is recirculation ratio?

The Recirculation ratio is the ratio of RAS pumping rate to influent flow rate. The recirculation ratio can vary from 0.25 to 1.50 depending upon the type of activated sludge process used.

How to Calculate Average Daily Influent Flow Rate using Recirculation Ratio?

Average Daily Influent Flow Rate using Recirculation Ratio calculator uses Average daily influent flow rate = Return Activated Sludge/Recirculation Ratio to calculate the Average daily influent flow rate, The Average daily influent flow rate using recirculation ratio is the total amount of incoming sewage which enters the reactor daily. Average daily influent flow rate is denoted by Q symbol.

How to calculate Average Daily Influent Flow Rate using Recirculation Ratio using this online calculator? To use this online calculator for Average Daily Influent Flow Rate using Recirculation Ratio, enter Return Activated Sludge (Qr) & Recirculation Ratio (α) and hit the calculate button. Here is how the Average Daily Influent Flow Rate using Recirculation Ratio calculation can be explained with given input values -> 233513.5 = 0.000115740740740741/1.5.

FAQ

What is Average Daily Influent Flow Rate using Recirculation Ratio?
The Average daily influent flow rate using recirculation ratio is the total amount of incoming sewage which enters the reactor daily and is represented as Q = Qr or Average daily influent flow rate = Return Activated Sludge/Recirculation Ratio. Return activated sludge flow rate will vary with each installation and with different load factors & Recirculation Ratio is the ratio of the RAS pumping rate to influent flow rate.
How to calculate Average Daily Influent Flow Rate using Recirculation Ratio?
The Average daily influent flow rate using recirculation ratio is the total amount of incoming sewage which enters the reactor daily is calculated using Average daily influent flow rate = Return Activated Sludge/Recirculation Ratio. To calculate Average Daily Influent Flow Rate using Recirculation Ratio, you need Return Activated Sludge (Qr) & Recirculation Ratio (α). With our tool, you need to enter the respective value for Return Activated Sludge & Recirculation Ratio 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 Average daily influent flow rate?
In this formula, Average daily influent flow rate uses Return Activated Sludge & Recirculation Ratio. We can use 5 other way(s) to calculate the same, which is/are as follows -
  • Average daily influent flow rate = Reactor Volume*MLVSS*(1+(Endogenous decay coefficient*Mean Cell Residence Time))/(Mean Cell Residence Time*Maximum Yield Coefficient*(Influent Substrate Concentration-Effluent substrate concentration))
  • Average daily influent flow rate = Reactor Volume/Hydraulic retention time
  • Average daily influent flow rate = Net waste activated sludge/(8.34*Observed Cell Yield*(Influent Substrate Concentration-Effluent substrate concentration))
  • Average daily influent flow rate = (Theoretical Oxygen Requirement+(1.42*Net waste activated sludge))*(BOD conversion factor/(8.34*(Influent Substrate Concentration-Effluent substrate concentration)))
  • Average daily influent flow rate = ((Sludge Concentration in Return Line/MLSS)*(Return Activated Sludge+WAS Pumping Rate from Return Line))-Return Activated Sludge
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