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Sludge Recirculation Ratio Formula

GoSludge Recirculation Ratio given Sludge Volume Index Formula

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Recirculation Ratio is the ratio of the RAS pumping rate to influent flow rate. Check FAQs

α = \frac{Q r}{Q s}

α - Recirculation Ratio?Q_r - Recirculation Flow?Q_s - Sewage Discharge?

Sludge Recirculation Ratio Example

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Here is how the Sludge Recirculation Ratio equation looks like with Values.

Here is how the Sludge Recirculation Ratio equation looks like with Units.

Here is how the Sludge Recirculation Ratio equation looks like.

1.5 = \frac{15}{10}

1.5 = \frac{15m³/s}{10m³/s}

1.5 = \frac{15}{10}

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Sludge Recirculation Ratio Solution

Follow our step by step solution on how to calculate Sludge Recirculation Ratio?

FIRST Step Consider the formula

α = \frac{Q r}{Q s}

Next Step Substitute values of Variables

∴

α = \frac{15m³/s}{10m³/s}

Next Step Prepare to Evaluate

∴

α = \frac{15}{10}

LAST Step Evaluate

∴

α = 1.5

Sludge Recirculation Ratio Formula Elements

Variables

Recirculation Ratio

Recirculation Ratio is the ratio of the RAS pumping rate to influent flow rate.

Symbol: α

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Recirculation Ratio

Recirculation Flow

Recirculation Flow is the flow generated in recirculation tank collecting the primary treated effluent from a pretreatment component.

Symbol: Q_r

Measurement: Volumetric Flow RateUnit: m³/s

Note: Value should be greater than 0.

Formulas to find Recirculation Flow

Sewage Discharge

Sewage discharge is the flow rate of sewage when it is being discharged in the river.

Symbol: Q_s

Measurement: Volumetric Flow RateUnit: m³/s

Note: Value should be greater than 0.

Formulas to find Sewage Discharge

Other Formulas to find Recirculation Ratio

Go Sludge Recirculation Ratio given Sludge Volume Index

α = (\frac{SSV}{X'}) \cdot 1000

Other formulas in Sludge Recirculation Ratio category

Go Sludge Recirculation Rate given Sludge Recirculation Ratio

Qr' = α \cdot C s

Go Sludge Recirculation Rate given MLSS and SVI

Q r' = Q s \cdot (\frac{X}{(\frac{10^{6}}{SVI s}) - X})

How to Evaluate Sludge Recirculation Ratio?

Sludge Recirculation Ratio evaluator uses Recirculation Ratio = Recirculation Flow/Sewage Discharge to evaluate the Recirculation Ratio, The Sludge Recirculation Ratio formula is defined as the ratio of return sludge to sewage flow. It is also called return sludge ratio. Recirculation Ratio is denoted by α symbol.

How to evaluate Sludge Recirculation Ratio using this online evaluator? To use this online evaluator for Sludge Recirculation Ratio, enter Recirculation Flow (Q_r) & Sewage Discharge (Q_s) and hit the calculate button.

FAQs on Sludge Recirculation Ratio

What is the formula to find Sludge Recirculation Ratio?

The formula of Sludge Recirculation Ratio is expressed as Recirculation Ratio = Recirculation Flow/Sewage Discharge. Here is an example- 1.5 = 15/10.

How to calculate Sludge Recirculation Ratio?

With Recirculation Flow (Q_r) & Sewage Discharge (Q_s) we can find Sludge Recirculation Ratio using the formula - Recirculation Ratio = Recirculation Flow/Sewage Discharge.

What are the other ways to Calculate Recirculation Ratio?

Here are the different ways to Calculate Recirculation Ratio-

Recirculation Ratio=(Settled Sludge Volume/Mixed Liquor Suspended Solids)*1000

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Sludge Recirculation Ratio Formula

​GoSludge Recirculation Ratio given Sludge Volume Index Formula

Sludge Recirculation Ratio Example

Sludge Recirculation Ratio Solution

Sludge Recirculation Ratio Formula Elements

Other Formulas to find Recirculation Ratio

Other formulas in Sludge Recirculation Ratio category

How to Evaluate Sludge Recirculation Ratio?

FAQs on Sludge Recirculation Ratio

Variable Name

GoSludge Recirculation Ratio given Sludge Volume Index Formula