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Mean Cell Residence Time and Sludge Yield Calculations via Phosphorus Balance

Movva Reddy, Ben Koopman, Stan Keely, Bert Hale and Rod Reardon
Journal (Water Pollution Control Federation)
Vol. 60, No. 12 (Dec., 1988), pp. 2101-2104
Stable URL: http://www.jstor.org/stable/25046866
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Mean Cell Residence Time and Sludge Yield Calculations via Phosphorus Balance
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Abstract

Equations for calculating mean cell residence time (MCRT) and sludge yield from mass balances on phosphorus in the activated sludge process were derived. This approach does not require estimation of sludge production quantities and thus is independent of waste activated sludge measurements. Based on data from two pilot-scale systems and one full-scale plant, it was found that MCRT and sludge yield calculated by the phosphorus balance approach corresponded closely to values of these parameters calculated from mass balances on total suspended solids. Nomograms for rapid graphical determination of MCRT and sludge yield from phosphorus data are presented.

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