Modelling hindered batch settling Part I: A model for linking zone settling velocity and stirred sludge volume index

Abstract

A new type of model for describing the relationship between zone settling velocity (Vs) and stirred sludge volume index (SSVI) is developed. Compared to the earlier studies which link SSVI and Vs (to reduce multiple batch tests when collecting X-Vs data), the proposed model is more advantageous because it also describes regions of low solids concentrations. The model is derived from the model for batch settling curve and is expressed as, where Cand β are parameters describing zone settling velocity and X is the activated sludge concentration.

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