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Titolo:
KINETICS OF DENITRIFICATION REACTIONS IN SINGLE SLUDGE SYSTEMS
Autore:
CARUCCI A; RAMADORI R; ROSSETTI S; TOMEI MC;
Indirizzi:
CNR,WATER RES INST,VIA RENO 1 I-00198 ROME ITALY CNR,WATER RES INST I-00198 ROME ITALY UNIV ROMA LA SAPIENZA,DEPT HYDRAUL ENGN I-00184 ROME ITALY
Titolo Testata:
Water research
fascicolo: 1, volume: 30, anno: 1996,
pagine: 51 - 56
SICI:
0043-1354(1996)30:1<51:KODRIS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Keywords:
DENITRIFICATION KINETICS; SEMICONTINUOUS APPARATUS; INFLUENT COD CHARACTERIZATION; ENDOGENOUS CARBON; INTERNAL CARBON;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
8
Recensione:
Indirizzi per estratti:
Citazione:
A. Carucci et al., "KINETICS OF DENITRIFICATION REACTIONS IN SINGLE SLUDGE SYSTEMS", Water research, 30(1), 1996, pp. 51-56

Abstract

This paper reports denitrification studies performed using the anoxicreactor of a laboratory scale anoxic-aerobic plant as a batch reactorof variable volume. This was achieved by adding to the anoxic reactora supplementary flow of nitrate after the shut down of the recirculation line and the interruption of the hydraulic connection to the aerobic reactor. By operating in this way, in a relatively short time, it is possible to get a number of experimental data sufficient to describethe biological process kinetics. The system is extremely flexible andgives kinetic data in short times for different experimental conditions. In fact, it is possible to operate at different COD/NO3-N ratios simply by changing the influent wastewater flowrate to the anoxic reactor. Two series of tests were performed: in the first series (use of endogenous carbon) a supplementary flow of nitrate was fed to the anoxicreactor while the wastewater influent flow was interrupted; in the second series (use of internal carbon) the influent wastewater flow was fed during the addition of nitrate. The importance of the carbonaceoussubstrate nature on the denitrification rate was also verified. Data analysis was performed by utilizing the integral method procedure and a zero order kinetics referring to both the substrates COD and nitratenitrogen was considered. A satisfactory agreement between predicted and experimental data was found. Values obtained for k(D) range from 0.07 mg NO3-N/mg VSS . d, at which the carbon source is mostly endogenous, to 0.25 mg NO3-N/mg VSS . d, at which the carbon source consists mainly of readily biodegradable GOD. Intermediate values occur when the readily biodegradable COD is limiting and denitrification takes place by utilizing the slowly biodegradable one.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/10/20 alle ore 08:34:14