Record Display for the EPA National Library Catalog


Main Title Digital computer control of advanced waste treatment systems /
Author Yarrington, Robert ; Schuk, Walter W. ; Bishop, Dolloff F. ; Bowers, James E. ; Fine., Elliot D. ;
Other Authors
Author Title of a Work
Yarrington, Robert.
CORP Author District of Columbia Dept. of Environmental Services, Washington. ;IBM Corp., Gaithersburg, Md.;Municipal Environmental Research Lab., Cincinnati, Ohio.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory,
Year Published 1977
Report Number EPA/600/2-77/211; EPA-68-01-0162
Stock Number PB-274 859
OCLC Number 31058031
Subjects Sewage disposal plants ; Sewage--Purification
Additional Subjects Water pollution control ; Automatic control ; Activated sludge treatment ; Process control ; Pilot plants ; Digital computers ; pH ; Aeration ; Nitrification ; Process control ; Design criteria ; Performance evaluation ; Dissolved gases ; Oxygen ; Concentration(Composition) ;
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-2-77-211 c.1 Headquarters Library/Washington,DC 03/26/2014
ELBD ARCHIVE EPA 600-2-77-211 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 600-2-77-211 AWBERC Library/Cincinnati,OH 05/17/2022
ESAD  EPA 600-2-77-211 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-274 859 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 41 pages : illustrations ; 28 cm
The objectives of the study were to develop and demonstrate automatic control strategies using a digital computer on advanced wastewater treatment systems. Two basic pilot treatment systems were automated, physical-chemical treatment and the three-stage activated sludge system. The digital automation involved control of lime feeding, pH control with CO2, FeCl3, sludge wasting, and breakpoint chlorination in the physical-chemical system. In the biological system, the automation involved FeCl3 dosage and D.O. control in aeration, pH control in nitrification and CH3OH and alum dosage controls in denitrification. The digital control approaches satisfactorily operated the pilot plants.
"November 1977." "Contract number 68-01-0162." "This study was conducted in cooperation with District of Columbia Department of Environmental Services and International Business Machines Corporation."