Record Display for the EPA National Library Catalog


Main Title Design and Control of Transient Waste Treatment Processes.
Author Erickso, Larry E. ;
CORP Author Kansas Water Resources Research Inst., Manhattan.
Year Published 1973
Report Number Contrib-122; OWRR-A-045-KAN; A-045-KAN(2),; 14762
Stock Number PB-223 962
Additional Subjects ( Sewage treatment ; Process control) ; ( Activated sludge process ; Feedback control) ; Measurement ; Summarizing ; Dynamics ; Adenosine phosphates ; Control theory ; Water pollution control
Library Call Number Additional Info Location Last
NTIS  PB-223 962 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 21p
The rate at which many wastes are generated varies significantly with time. This research was concerned with the development of measurement procedures to characterize the state of the system, the development of open loop dynamic response information for the activated sludge process, and the synthesis of optimal feedback control systems for waste treatment processes. The use of adenosine triphosphate as a measurable variable to help characterize the state of the process was investigated. This variable responded rapidly to changes in cell physiological state and with the population dynamics of the culture. Important time constants in the activated sludge process have been identified and estimated from the open loop dynamic studies. Optimal feedback control theory has been applied to growth processes and results have been obtained for a completely mixed flow system. (Author) Portions of this document are not fully legible.