Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Experimental Optimization of Step Aeration Waste Treatment Systems.
Author Erickso, Larry E. ;
CORP Author Kansas Water Resources Research Inst., Manhattan.
Year Published 1972
Report Number DI-14-31-0001-3016; OWRR-A-029-KAN; 06289,; A-029-KAN(5)
Stock Number PB-207 787
Additional Subjects ( Microorganism control(Sewage) ; Aeration) ; ( Sewage treatment ; Microorganism control(Sewage)) ; ( Activated sludge process ; Aeration) ; Design criteria ; Optimization ; Research ; Computer programming ; Mathematical models ; Tests ;
Library Call Number Additional Info Location Last
NTIS  PB-207 787 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 32p
Computer studies using mathematical models indicate that the step aeration process is advantageous under some conditions with the optimal design depending on the kinetic model and the parameter values within the model. Experimental studies directed toward kinetic model identification in mixed populations have been conducted. The kinetic behavior of mixed populations of activated sludge has been investigated over a wide range of operating conditions. The growth parameters change significantly and systematically with mean residence time. The results suggest that different cell populations predominated at different mean residence times with fast-growing cells predominating at low mean residence times and slow-growing cells predominating at high mean residence times. An experimental investigation of optimal conditions using evolutionary operation indicated that step aeration was desirable. (Author)