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Titolo:
NITRIFICATION DENITRIFICATION IN AN INTERMITTENT AERATION PROCESS FORSWINE WASTE-WATER/
Autore:
LIAO CM; MAEKAWA T;
Indirizzi:
NATL TAIWAN UNIV,DEPT AGR ENGN TAIPEI 10617 TAIWAN UNIV TSUKUBA,INST AGR ENGN TSUKUBA IBARAKI 305 JAPAN
Titolo Testata:
Journal of environmental science and health. Part B. Pesticides, food contaminants, and agricultural wastes
fascicolo: 5, volume: 29, anno: 1994,
pagine: 1053 - 1078
SICI:
0360-1234(1994)29:5<1053:NDIAIA>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
NITRIFICATION; PHOSPHORUS; NITROGEN; REMOVAL; WATER;
Keywords:
INTERMITTENT AERATION; SWINE WASTE-WATER; NITRIFICATION; DENITRIFICATION; T-N/BOD RATIO;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
7
Recensione:
Indirizzi per estratti:
Citazione:
C.M. Liao e T. Maekawa, "NITRIFICATION DENITRIFICATION IN AN INTERMITTENT AERATION PROCESS FORSWINE WASTE-WATER/", Journal of environmental science and health. Part B. Pesticides, food contaminants, and agricultural wastes, 29(5), 1994, pp. 1053-1078

Abstract

Nitrogen removal by a methane fermentation plus activated sludge process with the intermittent aeration was presented based upon a full-scale pig farm experiment. Swine wastewater had a T-N/BOD ratio from 0.2-0.29. The BOD concentration input to the process ranged from 1050-1608mg l(-1) and the T-N concentration from 273-350 mg l(-1). More than 90% of organic carbon was removed in each experimental run. Only small concentrations of NO3-N were found in the effluent and higher than 60%of the T-N and 73% of NH4-N which were loaded to the intermittent aeration tank was removed. The nitrogen balance of each run was calculated. Denitrification was estimated to be accountable for 45-90% of the T-N removed in the intermittent aeration tank. Denitrification rate increased as the BOD concentration increased (> 1300 The T-N removal percentage was a function mg l(-1)) of the T-N/BOD ratio of the influent. Although higher DO concentration (> 3 mg l(-1)) did not enhance the denitrification rate, nitrification did maintain at relative higher rates at a lower DO concentration (ave. 1.5 mg l(-1)). An operational condition of intermittent interval of aeration/nonaeration at 1:1 hr is better than that of the condition at 3:1 hr. As a result, T-N and NH4-N were removed up to 30% and 40% respectively, and the denitrification rate reached 79% in the intermittent aeration tank. An experimental runin a pilot plant on treating anaerobically pretreated swine wastewater was observed to verify simultaneous nitrification/denitrification. The results of the full-scale plant experimentation seem to be confirmed by those obtained from the pilot plant runs.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 14:47:26