Sludge Recirculation Rate given Sludge Recirculation Ratio Calculator

✖Recirculation Ratio is the ratio of the RAS pumping rate to influent flow rate.ⓘ Recirculation Ratio [α]			+10% -10%
✖Sewage Concentration can be in terms of bod, do, suspended solids etc.ⓘ Sewage Concentration [C_s]			+10% -10%

✖Recirculation flow is the flow generated in recirculation tank collecting the primary treated effluent from a pretreatment component.ⓘ Sludge Recirculation Rate given Sludge Recirculation Ratio [Q_r]

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Formula

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Sludge Recirculation Rate given Sludge Recirculation Ratio

Formula

`"Q"_{"r"} = "α"*"C"_{"s"}`

Example

`"25920m³/d"="1.5"*"0.2"`

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Sludge Recirculation Rate given Sludge Recirculation Ratio Solution

STEP 0: Pre-Calculation Summary

Formula Used

Recirculation flow = Recirculation Ratio*Sewage Concentration
Q_r = α*C_s
This formula uses 3 Variables

Variables Used

Recirculation flow - (Measured in Cubic Meter per Second) - Recirculation flow is the flow generated in recirculation tank collecting the primary treated effluent from a pretreatment component.
Recirculation Ratio - Recirculation Ratio is the ratio of the RAS pumping rate to influent flow rate.
Sewage Concentration - Sewage Concentration can be in terms of bod, do, suspended solids etc.

STEP 1: Convert Input(s) to Base Unit

Recirculation Ratio: 1.5 --> No Conversion Required
Sewage Concentration: 0.2 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Q_r = α*C_s --> 1.5*0.2

Evaluating ... ...

Q_r = 0.3

STEP 3: Convert Result to Output's Unit

0.3 Cubic Meter per Second -->25920 Cubic Meter per Day (Check conversion here)

FINAL ANSWER

25920 Cubic Meter per Day <-- Recirculation flow

(Calculation completed in 00.004 seconds)

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Created by Suraj Kumar

Birsa Institute of Technology (BIT), Sindri

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< 4 Sludge Recirculation Ratio Calculators

Sludge Recirculation Rate given MLSS and SVI

Go Recirculation flow = Sewage Discharge*(MLSS/(((10^6)/Sludge Volume Index)-MLSS))

Sludge Recirculation Ratio given Sludge Volume Index

Go Recirculation Ratio = (MLSS/(((10^6)/Sludge Volume Index)-MLSS))

Sludge Recirculation Rate given Sludge Recirculation Ratio

Go Recirculation flow = Recirculation Ratio*Sewage Concentration

Sludge Recirculation Ratio

Go Recirculation Ratio = Recirculation flow/Sewage Discharge

Sludge Recirculation Rate given Sludge Recirculation Ratio Formula

Recirculation flow = Recirculation Ratio*Sewage Concentration
Q_r = α*C_s

What is sludge loading rate ?

The sludge loading rate relates the daily wastewater load (kg BOD / d) and the available sludge mass. The sludge loading rate is, in addition to the sludge retention time, the main design variable of an activated sludge plant.

How to Calculate Sludge Recirculation Rate given Sludge Recirculation Ratio?

Sludge Recirculation Rate given Sludge Recirculation Ratio calculator uses Recirculation flow = Recirculation Ratio*Sewage Concentration to calculate the Recirculation flow, Sludge Recirculation Rate given Sludge Recirculation Ratio calculates sludge recirculation rate when we have prior information of other parameters used. Recirculation flow is denoted by Q_r symbol.

How to calculate Sludge Recirculation Rate given Sludge Recirculation Ratio using this online calculator? To use this online calculator for Sludge Recirculation Rate given Sludge Recirculation Ratio, enter Recirculation Ratio (α) & Sewage Concentration (C_s) and hit the calculate button. Here is how the Sludge Recirculation Rate given Sludge Recirculation Ratio calculation can be explained with given input values -> 5.5E+9 = 1.5*0.2.

FAQ

What is Sludge Recirculation Rate given Sludge Recirculation Ratio?

Sludge Recirculation Rate given Sludge Recirculation Ratio calculates sludge recirculation rate when we have prior information of other parameters used and is represented as Q_r = α*C_s or Recirculation flow = Recirculation Ratio*Sewage Concentration. Recirculation Ratio is the ratio of the RAS pumping rate to influent flow rate & Sewage Concentration can be in terms of bod, do, suspended solids etc.

How to calculate Sludge Recirculation Rate given Sludge Recirculation Ratio?

Sludge Recirculation Rate given Sludge Recirculation Ratio calculates sludge recirculation rate when we have prior information of other parameters used is calculated using Recirculation flow = Recirculation Ratio*Sewage Concentration. To calculate Sludge Recirculation Rate given Sludge Recirculation Ratio, you need Recirculation Ratio (α) & Sewage Concentration (C_s). With our tool, you need to enter the respective value for Recirculation Ratio & Sewage Concentration 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 Recirculation flow?

In this formula, Recirculation flow uses Recirculation Ratio & Sewage Concentration. We can use 1 other way(s) to calculate the same, which is/are as follows -

Recirculation flow = Sewage Discharge*(MLSS/(((10^6)/Sludge Volume Index)-MLSS))

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