Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Controlling factors for simultaneous nitrification and denitrification in a two-stage intermittent aeration process treating domestic sewage
Autore:
Zhao, HW; Mavinic, DS; Oldham, WK; Koch, FA;
Indirizzi:
Univ British Columbia, Dept Civil Engn, Vancouver, BC V6T 1Z4, Canada UnivBritish Columbia Vancouver BC Canada V6T 1Z4 ver, BC V6T 1Z4, Canada Stanley Associates Engn Ltd, Surrey, England Stanley Associates Engn Ltd Surrey England es Engn Ltd, Surrey, England
Titolo Testata:
WATER RESEARCH
fascicolo: 4, volume: 33, anno: 1999,
pagine: 961 - 970
SICI:
0043-1354(199903)33:4<961:CFFSNA>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUSPENDED-GROWTH REACTOR; POTENTIAL ORP REGULATION; ACTIVATED-SLUDGE PROCESS; AEROBIC DENITRIFICATION; THIOSPHAERA-PANTOTROPHA; DISSOLVED-OXYGEN; REMOVAL; LIMITATION; METHANOL; NITRATE;
Keywords:
acetate; aerobic denitrification; anoxic denitrification; autotrophic nitrification; heterotrophic nitrification; intermittent aeration; methanol; ORP control; simultaneous nitrification and denitrification;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Mavinic, DS UnivZ4,itish Columbia, Dept Civil Engn, 2324 Main Mall, Vancouver, BC V6T 1 Univ British Columbia 2324 Main Mall Vancouver BC Canada V6T 1Z4
Citazione:
H.W. Zhao et al., "Controlling factors for simultaneous nitrification and denitrification in a two-stage intermittent aeration process treating domestic sewage", WATER RES, 33(4), 1999, pp. 961-970

Abstract

This bench-scale research investigated the controlling factors for simultaneous nitrification and denitrification (SND) in a 2-stage, intermittent aeration (IA) process, designed for nitrogen and phosphorus removal. The 2-stage process consisted of an anaerobic zone followed by an oxidation-reduction potential (ORP) controlled, intermittently aerated, completely mixed (IACM), tank. The three independent variables examined were the average ORP level, organic substrate (acetate and methanol) dosage and aeration cycle. The sewage used was completely of residential origin. Nitrogen balance clearly indicated that the nitrogen loss, due to SND in the aeration tank, contributed 10% to 50% of the influent TKN to the overall nitrogen removal. Significant differences in both nitrification and denitrification in the IACM tank were observed, when different average ORP levels were applied to the aeration control; this proved that absolute ORP can be used as a real-time control parameter for SND. Under low DO and intermittent aeration conditions, acetate and methanol additions improved nitrification over the entire dosage range and denitrification at relatively low dosages. Finally, a longer aeration cycle, with a zero-DO period, appeared to favor sequential nitrification and denitrification (SQND), not SND. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 01:48:41