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OLS Field Name OLS Field Data
Main Title Nitrogen Removal and Identification for Water Quality Control.
Author Carlso, Dale A. ;
CORP Author Washington Univ., Seattle. Dept. of Civil Engineering.
Year Published 1971
Report Number DI-14-31-0001-3248; OWRR-A-040-WASH; 00800,; A-040-WASH(1)
Stock Number PB-204 231
Additional Subjects ( Nitrogen inorganic compounds ; Chemical removal(Sewage treatment)) ; ( Sewage treatment ; Denitration) ; ( Nitrification ; Sewage treatment) ; ( Activated sludge process ; Denitration) ; Design criteria ; Aeration ; Bacteria ; Ammonia ; Anaerobic processes ; Pilot plants ; Biodeterioration ; Pseudomonas ; Reaction kinetics ; Potassium nitrate ; Water analysis ; Electrodes ; Monitors ; Denitrification ; Water pollution control ; Eutrophication ; Water pollution detection
Library Call Number Additional Info Location Last
NTIS  PB-204 231 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 53p
Abstract Removal of nitrogen from waste water systems by biological nitrification and denitrification in an activated sludge system is considered. One of the major methods proposed for controlling excess algal production in receiving waters, the process consists of aerating activated sludge mixed liquor solids for detention times sufficient for nitrifying bacteria to oxidize ammonia to nitrate. The mixed liquor then goes to an anaerobic denitrification zone where the nitrate is biologically converted to nitrogen gas. Pilot plant studies preceding the current studies are discussed prior to presentation of the work on pure culture kinetic studies and development of ion selective cathodes for identification of nitrogen fractions. For the conditions used, the rate of denitrification by Pseudomonas denitrificans followed the Michaelis pattern, not being inhibited by high concentrations of CH3COONa as the substrate. Although the rates denitrification at the various KNO3 concentrations did not follow the Michaelis pattern, inhibiting effects of nitrate were not observed at KNO3 concentrations as high as 8.0 mM/l. The use of ion selective cathodes for detecting ions such as the nitrogens was investigated. It appears that the selectivity of ion-selective cathodes can be increased greatly by the addition of time dependent retarding voltages. (Author)
NTIS Title Notes Final rept..
PUB Date Free Form 15 Aug 71,
Category Codes 13B; 68D
NTIS Prices PC A04/MF A01
Document Type NT
Cataloging Source NTIS/MT
Control Number 326522794
Origin NTIS
Type CAT