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1 ) In an Experiment conducted in a 1 L cylinder to assess the settling properties of activated sludge, the volume of the settled sludge

$1)$ In an Experiment conducted in a $1 L$ cylinder to assess the settling properties of activated

sludge, the volume of the settled sludge is observed as $350 m l$ after $30$ min.

a $)$ What is the SVI value of this activated sludge having $2500 m \frac{g}{I} S S$ concentration?

b $)$ What could be the biomass concentration in the recycle stream of this system having

the SVI calculated from this experiment?

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