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Sludge Recirculation Ratio given Sludge Volume Index Formula

GoSludge Recirculation Ratio Formula

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

α = (\frac{SSV}{X'}) \cdot 1000

α - Recirculation Ratio?SSV - Settled Sludge Volume?X^' - Mixed Liquor Suspended Solids?

Sludge Recirculation Ratio given Sludge Volume Index Example

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

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

Here is how the Sludge Recirculation Ratio given Sludge Volume Index equation looks like.

1.5053 = (\frac{1.29}{857}) \cdot 1000

1.5053 = (\frac{1.29mg/L}{857mg/L}) \cdot 1000

1.5053 = (\frac{1.29}{857}) \cdot 1000

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Sludge Recirculation Ratio given Sludge Volume Index Solution

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

FIRST Step Consider the formula

α = (\frac{SSV}{X'}) \cdot 1000

Next Step Substitute values of Variables

∴

α = (\frac{1.29mg/L}{857mg/L}) \cdot 1000

Next Step Convert Units

∴

α = (\frac{0.0013kg/m³}{0.857kg/m³}) \cdot 1000

Next Step Prepare to Evaluate

∴

α = (\frac{0.0013}{0.857}) \cdot 1000

Next Step Evaluate

∴

α = 1.50525087514586

LAST Step Rounding Answer

∴

α = 1.5053

Sludge Recirculation Ratio given Sludge Volume Index 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

Settled Sludge Volume

Settled Sludge Volume is the volume of sludge that has settled out from wastewater during a treatment process, typically in a sedimentation tank or clarifier.

Symbol: SSV

Measurement: DensityUnit: mg/L

Note: Value should be greater than 0.

Formulas to find Settled Sludge Volume

Mixed Liquor Suspended Solids

Mixed Liquor Suspended Solids refers to the concentration of suspended solids in the mixed liquor of an aeration tank during the activated sludge process.

Symbol: X^'

Measurement: DensityUnit: mg/L

Note: Value should be less than 6500.

Formulas to find Mixed Liquor Suspended Solids

Other Formulas to find Recirculation Ratio

Go Sludge Recirculation Ratio

α = \frac{Q r}{Q s}

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 given Sludge Volume Index?

Sludge Recirculation Ratio given Sludge Volume Index evaluator uses Recirculation Ratio = (Settled Sludge Volume/Mixed Liquor Suspended Solids)*1000 to evaluate the Recirculation Ratio, The Sludge Recirculation Ratio given Sludge Volume Index formula is defined as the calculation of sludge recirculation ratio when we have prior information of other parameters used. Recirculation Ratio is denoted by α symbol.

How to evaluate Sludge Recirculation Ratio given Sludge Volume Index using this online evaluator? To use this online evaluator for Sludge Recirculation Ratio given Sludge Volume Index, enter Settled Sludge Volume (SSV) & Mixed Liquor Suspended Solids (X^') and hit the calculate button.

FAQs on Sludge Recirculation Ratio given Sludge Volume Index

What is the formula to find Sludge Recirculation Ratio given Sludge Volume Index?

The formula of Sludge Recirculation Ratio given Sludge Volume Index is expressed as Recirculation Ratio = (Settled Sludge Volume/Mixed Liquor Suspended Solids)*1000. Here is an example- 1.505251 = (0.00129/0.857)*1000.

How to calculate Sludge Recirculation Ratio given Sludge Volume Index?

With Settled Sludge Volume (SSV) & Mixed Liquor Suspended Solids (X^') we can find Sludge Recirculation Ratio given Sludge Volume Index using the formula - Recirculation Ratio = (Settled Sludge Volume/Mixed Liquor Suspended Solids)*1000.

What are the other ways to Calculate Recirculation Ratio?

Here are the different ways to Calculate Recirculation Ratio-

Recirculation Ratio=Recirculation Flow/Sewage Discharge

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