||Design and Control of Transient Waste Treatment Processes.
Erickso, Larry E. ;
||Kansas Water Resources Research Inst., Manhattan.
||Contrib-122; OWRR-A-045-KAN; A-045-KAN(2),; 14762
( Sewage treatment ;
Process control) ;
( Activated sludge process ;
Feedback control) ;
Adenosine phosphates ;
Control theory ;
Water pollution control
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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.