Record Display for the EPA National Library Catalog


Main Title Generalized Computer Model for Steady-State Performance of the Activated Sludge Process.
Author Smit, Robert ; Eiler, Richard G. ;
CORP Author Federal Water Pollution Control Administration, Cincinnati, Ohio. Advanced Waste Treatment Branch.
Year Published 1969
Report Number EPA-17090; 17090-10/69;
Stock Number PB-219 473
Additional Subjects ( Activated sludge process ; Mathematical models) ; ( Sewage treatment ; Mathematical models) ; Computer programs ; FORTRAN ; Computerized simulation ; Bacteria ; Steady state ; Runge-Kutta method ; Punched cards ; IBM 1130 computers
Library Call Number Additional Info Location Last
NTIS  PB-219 473 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 468 cards
This computer program (FORTRAN, IBM 1130) is a steady-state model of the conventional activated sludge process which is flexible enough to simulate the performance of any of the models proposed (complete mix, plug flow, multiple aeration tanks, step aeration, step return flow, contact stabilization, extended aeration, etc.). Two classes of microorganisms are considered: heterotrophs and nitrosomonas. The mathematical model allows the maximum rate constant for synthesis to vary with process loading. Another computer program is also included which simulates a fill and draw bench experiment in which activated sludge is mixed with substrate in any proportion. The program uses Runge-Kutta method of numerical integration to compute the biological activity as a function of time in the batch activated sludge experiment.