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Titolo:
Emission and control of nitrous oxide from a biological wastewater treatment system with intermittent aeration
Autore:
Park, KY; Inamori, Y; Mizuochi, M; Ahn, KH;
Indirizzi:
Korea Inst Sci & Technol, Environm & Proc Technol Div, Songbuk Gu, Seoul 136791, South Korea Korea Inst Sci & Technol Seoul South Korea 136791 ul 136791, South Korea Natl Inst Environm Studies, Div Reg Environm, Tsukuba, Ibaraki 3050053, Japan Natl Inst Environm Studies Tsukuba Ibaraki Japan 3050053 i 3050053, Japan
Titolo Testata:
JOURNAL OF BIOSCIENCE AND BIOENGINEERING
fascicolo: 3, volume: 90, anno: 2000,
pagine: 247 - 252
SICI:
1389-1723(200009)90:3<247:EACONO>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
DENITRIFYING ACTIVATED-SLUDGE; NITROSOMONAS-EUROPAEA; ALCALIGENES-FAECALIS; WATER TREATMENT; TREATMENT-PLANT; N2O PRODUCTION; NITRIFICATION; DENITRIFICATION; GAS;
Keywords:
nitrous oxide; intermittent aeration; nutrient removal; external carbon; wastewater treatment;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Park, KY Korea Inst Sci & Technol, Environm & Proc Technol Div, Songbuk Gu, 39-1 Hawolgok Dong, Seoul 136791, South Korea Korea Inst Sci & Technol 39-1 Hawolgok Dong Seoul South Korea 136791
Citazione:
K.Y. Park et al., "Emission and control of nitrous oxide from a biological wastewater treatment system with intermittent aeration", J BIOSCI BI, 90(3), 2000, pp. 247-252

Abstract

Nitrous oxide (N2O) can be emitted as a by-product of the process of nitrogen removal from wastewater. Two methods of complete denitrification and media application were studied in lab-scale intermittent aeration reactors fed with domestic wastewater to refine methods of controlling the N2O emission rate. A study on cyclic patterns showed that the highest N2O emission rate was at the beginning of the aerobic phase rather than the anoxic: phase. This was probably because the nitrifying bacteria had accumulated nitrite nitrogen (NO2-) under low DO conditions. Methanol as an external carbon source was added during the anoxic phase to reduce nitrate nitrogen (NO3-) whendenitrification was completed. The N2O emission rates in both the aerobic and anoxic phases were significantly influenced by residual NO3-, increasing monotonically as the concentration of NO3- in the reactor increased. Over95% of average N2O emissions in both the aerobic and anoxic phases were prevented when methanol was added. The biofilm reactor showed similar patterns to those of the non-biofilm reactor in track behavior, but the former wasmore effective in the reduction of N2O emissions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/10/20 alle ore 03:11:49