Record Display for the EPA National Library Catalog

RECORD NUMBER: 383 OF 751

OLS Field Name OLS Field Data
Main Title Mechanical Reliability and Plant Performance.
Author Rossman, Lewis A. ;
CORP Author Municipal Environmental Research Lab., Cincinnati, OH. Wastewater Research Div.
Year Published 1983
Report Number EPA-600/D-83-056;
Stock Number PB83-219402
Additional Subjects Sewage treatment ; Equipment ; Reliability ; Mathematical models ; Performance evaluation ; Standards ; Activated sludge process ; Biochemical oxygen demand ; Aeration ; Statistical analysis ; Cost effectiveness ; Failure ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB83-219402 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 12p
Abstract
A two state statistical model is proposed for studying the effect of equipment outages on plant performance. Simulation of lost treatment capacity in an activated sludge treatment system indicates the degree to which BOD violation frequencies are much more sensitive to lost aeration capacity than to lost clarifier or return sludge pumping capacity. A framework for utilizing the model to select cost-effective levels of design redundancy is presented. A simplified version of the procedure is applied to the design of an aeration system.