Anallysis of Biosolids Setting Velocity Equations and Solids Flux Using Sludge Settleability Parameters

Equations on setting velocity of the activated sludge were developed by including sludge settleability parameters (SSP) and solids flux at a secondary settling tank was analyzed using the empirical equations, and an optimal solids loading rate was evaluated in this study, SVI, SSVI, DSVI and were adopted as the SSP and a best fitting between observed and calculated zone setting tank was lower than that recommended by the national design criteria. Optimal solids loading rate and subsequent limiting solids flux can be derived if is used instead of other SSP. Limiting solis flux calculated using SVI showed higher value than that calculated using and the limiting solids flux could be better estimated when was used because the calculated zone setting velocity using was closer to the measured value.