Ishita Goyal
Meerut Institute of Engineering and Technology (MIET), Meerut
Ishita Goyal has created this Calculator and 100+ more calculators!
Chandana P Dev
NSS College of Engineering (NSSCE), Palakkad
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11 Other formulas that you can solve using the same Inputs

Mixed liquor volatile suspended solids when the volume of the reactor is given
mlvss=(mean cell residence time*average daily influent flow rate*maximum yield coefficient*(influent substrate concentration-effluent substrate concentration))/(Volume of the reactor*(1+(endogenous decay coefficient*mean cell residence time))) GO
Influent substrate concentration when the volume of the reactor is given
influent substrate concentration=((Volume of the reactor*mlvss*(1+(endogenous decay coefficient*mean cell residence time)))/(mean cell residence time*average daily influent flow rate*maximum yield coefficient))+effluent substrate concentration GO
Effluent substrate concentration when the volume of the reactor is given
effluent substrate concentration=influent substrate concentration-((Volume of the reactor*mlvss*(1+(endogenous decay coefficient*mean cell residence time)))/(mean cell residence time*average daily influent flow rate*maximum yield coefficient)) GO
Volume of the Reactor
Volume of the reactor=(mean cell residence time*maximum yield coefficient*average daily influent flow rate*(influent substrate concentration-effluent substrate concentration))/(mlvss*(1+(mean cell residence time*endogenous decay coefficient))) GO
Mean cell residence time when the volume of the reactor is given
mean cell residence time=(Volume of the reactor*mlvss)/(average daily influent flow rate*maximum yield coefficient*(influent substrate concentration-effluent substrate concentration)-(Volume of the reactor*mlvss*endogenous decay coefficient)) GO
Average daily influent flow rate when the volume of the reactor is given
average daily influent flow rate=Volume of the reactor*mlvss*(1+(endogenous decay coefficient*mean cell residence time))/(mean cell residence time*maximum yield coefficient*(influent substrate concentration-effluent substrate concentration)) GO
Maximum yield coefficient when the volume of the reactor is given
maximum yield coefficient=Volume of the reactor*mlvss*(1+(mean cell residence time*endogenous decay coefficient))/(mean cell residence time*average daily influent flow rate*(influent substrate concentration-effluent substrate concentration)) GO
Endogenous decay constant when the volume of the reactor is given
endogenous decay coefficient=((average daily influent flow rate*maximum yield coefficient*(influent substrate concentration-effluent substrate concentration))/(Volume of the reactor*mlvss))-(1/mean cell residence time) GO
Space velocity of a reactor
Space Velocity=Volumetric flow rate of feed to the reactor/Volume of the reactor GO
Hydraulic Retention Time
hydraulic retention time=Volume of the reactor/average daily influent flow rate GO
Space time of the reactor
Space time=Volume of the reactor/Volumetric flow rate of feed to the reactor GO

2 Other formulas that calculate the same Output

Concentration of Sludge in Return Line when RAS Pumping Rate from Aeration Tank is Given
sludge concentration in return line=mlss*(average daily influent flow rate+Return activated sludge)/(Return activated sludge+WAS pumping rate from return line) GO
Sludge Concentration Using Wasting Rate from Return Line when Solid Concentration in Effluent is Low
sludge concentration in return line=Volume of the reactor*mlss/(mean cell residence time*WAS pumping rate from return line) GO

Concentration of Sludge in Return Line when Wasting Rate from Return Line is Given Formula

sludge concentration in return line=(Volume of the reactor*mlss/(mean cell residence time*WAS pumping rate from return line))-(effluent flow rate*solid concentration in effluent/WAS pumping rate from return line)
X<sub>r=(V*X/(θ<sub>c*Q<sub>w<sup>'))-(Q<sub>e*X<sub>e/Q<sub>w<sup>')
More formulas
Volume of the Reactor GO
Mean cell residence time when the volume of the reactor is given GO
Average daily influent flow rate when the volume of the reactor is given GO
Maximum yield coefficient when the volume of the reactor is given GO
Influent substrate concentration when the volume of the reactor is given GO
Effluent substrate concentration when the volume of the reactor is given GO
Mixed liquor volatile suspended solids when the volume of the reactor is given GO
Endogenous decay constant when the volume of the reactor is given GO
Hydraulic Retention Time GO
Volume of Reactor when Hydraulic Retention Time is Given GO
Average daily influent flow rate when hydraulic retention time is given GO
Observed cell yield GO
Maximum yield coefficient when observed cell yield is given GO
Endogenous decay coefficient when observed cell yield is given GO
Mean cell residence time when observed cell yield is given GO
Net waste activated sludge GO
Observed Cell Yield When Net Waste Activated Sludge is Given GO
Average Daily Influent Flow Rate When Net Waste Activated Sludge is Given GO
Influent Substrate Concentration When Net Waste Activated Sludge is Given GO
Effluent substrate concentration when net waste activated sludge is given GO
Theoretical oxygen requirement for the removal of the carbonaceous organic matter GO
Total mass of BOD utilized when theoretical oxygen requirement is given GO
Mass of organisms wasted when theoretical oxygen requirement is given GO
Theoretical oxygen requirements using the conversion factor GO
Average daily influent flow rate when theoretical oxygen requirement is given GO
Influent substrate concentration when theoretical oxygen requirement is given GO
Conversion factor when theoretical oxygen requirement is given GO
Effluent substrate concentration when theoretical oxygen requirement is given GO
Net waste activated sludge when theoretical oxygen requirement is given GO
F:M ratio GO
Influent substrate concentration when F:M ratio is given GO
Hydraulic Retention Time When F:M Ratio is Given GO
Mixed Liquor Volatile Suspended Solids When F:M Ratio is Given GO
Organic loading GO
Influent substrate concentration when organic loading is given GO
Average daily influent flow rate when organic loading is given GO
Volume of the reactor when organic loading is given GO
Organic Loading Using Hydraulic Retention Time GO
Influent substrate concentration when organic loading using hydraulic retention time is given GO
Hydraulic retention time when organic loading is given GO
Wasting rate from return line GO
Volume of the reactor when wasting rate from return line is given GO
Mixed liquor suspended solids when wasting rate from return line is given GO
WAS Pumping Rate From Return Line When Wasting Rate From Return Line is Given GO
Effluent Flow Rate when Wasting Rate from Return Line is Given GO
Concentration of Solids in Effluent When Wasting Rate from Return Line is Given GO
Wasting Rate from Return Line when Concentration of Solid in Effluent is Low GO
Volume of Reactor Using Wasting Rate from Return Line when Concentration of Solid in Effluent is Low GO
MLSS Using Wasting rate From Return Line when Concentration of Solid in Effluent is Low GO
WAS Pumping Rate Using Wasting Rate from Return Line when Concentration of Solid in Effluent is Low GO
Sludge Concentration Using Wasting Rate from Return Line when Solid Concentration in Effluent is Low GO
WAS pumping rate from aeration tank GO
Sludge Age when WAS Pumping Rate from Aeration Tank is Given GO
Volume of Reactor When WAS Pumping Rate from Aeration Tank is Given GO
RAS Pumping Rate from Aeration Tank GO
MLSS when RAS Pumping Rate from Aeration Tank is Given GO
Average Daily Influent Flow Rate when RAS Pumping Rate from Aeration Tank is Given GO
Concentration of Sludge in Return Line when RAS Pumping Rate from Aeration Tank is Given GO
WAS Pumping Rate from Return Line when RAS Pumping Rate from Aeration Tank is Given GO
Recirculation Ratio GO
RAS Pumping Rate when Recirculation Ratio is Given GO
Average Daily Influent Flow Rate when Recirculation Ratio is Given GO

What is wasting rate?

The Wasting rate from return line is the time required to waste sludge from the return sludge line because return activated sludge is more concentrated and requires smaller waste sludge pumps.

How to Calculate Concentration of Sludge in Return Line when Wasting Rate from Return Line is Given?

Concentration of Sludge in Return Line when Wasting Rate from Return Line is Given calculator uses sludge concentration in return line=(Volume of the reactor*mlss/(mean cell residence time*WAS pumping rate from return line))-(effluent flow rate*solid concentration in effluent/WAS pumping rate from return line) to calculate the sludge concentration in return line, The Concentration of sludge in return line when wasting rate from return line is given is the total amount of microorganisms present in the return line. When lacking site-specific operational data, a value commonly assumed is 8000 mg/L. sludge concentration in return line and is denoted by Xr symbol.

How to calculate Concentration of Sludge in Return Line when Wasting Rate from Return Line is Given using this online calculator? To use this online calculator for Concentration of Sludge in Return Line when Wasting Rate from Return Line is Given, enter Volume of the reactor (V), mlss (X), mean cell residence time c), WAS pumping rate from return line (Qw'), effluent flow rate (Qe) and solid concentration in effluent (Xe) and hit the calculate button. Here is how the Concentration of Sludge in Return Line when Wasting Rate from Return Line is Given calculation can be explained with given input values -> -2.168E-15 = (1*0.001/(86400*1.15740740740741E-05))-(1.15740740740741E-05*0.001/1.15740740740741E-05).

FAQ

What is Concentration of Sludge in Return Line when Wasting Rate from Return Line is Given?
The Concentration of sludge in return line when wasting rate from return line is given is the total amount of microorganisms present in the return line. When lacking site-specific operational data, a value commonly assumed is 8000 mg/L and is represented as Xr=(V*X/(θc*Qw'))-(Qe*Xe/Qw') or sludge concentration in return line=(Volume of the reactor*mlss/(mean cell residence time*WAS pumping rate from return line))-(effluent flow rate*solid concentration in effluent/WAS pumping rate from return line). The volume of the reactor gives us the capacity of the reactor, Mlss is the sum of volatile suspended solids (organics) and fixed suspended solids (inorganics), mean cell residence time is the average time that the sludge remains in the reactor. , WAS pumping rate from return line is the flowrate of waste sludge from the return line, Effluent flow rate is the total quantity of the flow of sewage from the secondary clarifier and Solid concentration in effluent is the total amount of solids that are present in the effluent.
How to calculate Concentration of Sludge in Return Line when Wasting Rate from Return Line is Given?
The Concentration of sludge in return line when wasting rate from return line is given is the total amount of microorganisms present in the return line. When lacking site-specific operational data, a value commonly assumed is 8000 mg/L is calculated using sludge concentration in return line=(Volume of the reactor*mlss/(mean cell residence time*WAS pumping rate from return line))-(effluent flow rate*solid concentration in effluent/WAS pumping rate from return line). To calculate Concentration of Sludge in Return Line when Wasting Rate from Return Line is Given, you need Volume of the reactor (V), mlss (X), mean cell residence time c), WAS pumping rate from return line (Qw'), effluent flow rate (Qe) and solid concentration in effluent (Xe). With our tool, you need to enter the respective value for Volume of the reactor, mlss, mean cell residence time, WAS pumping rate from return line, effluent flow rate and solid concentration in effluent 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 sludge concentration in return line?
In this formula, sludge concentration in return line uses Volume of the reactor, mlss, mean cell residence time, WAS pumping rate from return line, effluent flow rate and solid concentration in effluent. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • sludge concentration in return line=Volume of the reactor*mlss/(mean cell residence time*WAS pumping rate from return line)
  • sludge concentration in return line=mlss*(average daily influent flow rate+Return activated sludge)/(Return activated sludge+WAS pumping rate from return line)
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