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Titolo:
Real-time control of an immobilized-cell reactor for wastewater treatment using ORP
Autore:
Chen, KC; Chen, CY; Peng, JW; Houng, JY;
Indirizzi:
Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 300, Taiwan Natl Tsing Hua Univ Hsinchu Taiwan 300 pt Chem Engn, Hsinchu 300, Taiwan I Shou Univ, Dept Chem Engn, Kaohsiung 815, Kaohsiung Count, Taiwan I ShouUniv Kaohsiung Kaohsiung Count Taiwan 815 Kaohsiung Count, Taiwan
Titolo Testata:
WATER RESEARCH
fascicolo: 1, volume: 36, anno: 2002,
pagine: 230 - 238
SICI:
0043-1354(200201)36:1<230:RCOAIR>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
BIOLOGICAL NUTRIENT REMOVAL; ANOXIC-AEROBIC DIGESTION; ACTIVATED-SLUDGE; NITROGEN REMOVAL; SYSTEM; WATER; MICROORGANISMS; PERFORMANCE;
Keywords:
PVA immobilization; intermittent aeration process; oxidation-reduction potentials; nitrification; denitrification; real-time control;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, KC Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 300, Taiwan Natl Tsing Hua Univ Hsinchu Taiwan 300 ngn, Hsinchu 300, Taiwan
Citazione:
K.C. Chen et al., "Real-time control of an immobilized-cell reactor for wastewater treatment using ORP", WATER RES, 36(1), 2002, pp. 230-238

Abstract

The performance of an immobilized-cell reactor for simultaneous carbon nitrogen removal in synthetic wastewater with an intermittent aeration (IA) process under real-time control of oxygen supply was investigated. The oxidation-reduction potential (ORP) was monitored during operation. The ORP-time profile showed distinctive turning points, which directly correlated with the changes in the system chemistry and biological activity. The reactor wasconducted by cyclic fixed-time aeration-nonaeration operation at the beginning, followed by real-time control technology using ORP setpoint. A movingwindow along the slope of the ORP curve was employed to search for the nitrate breakpoint of the aeration cycle. Once the breakpoint was found, the reactor was aerated for a fixed period. The treatment process could effectively avoid the anoxic fermentation state under the real-time control. The cycle time was reduced around 30%. The duration of aeration period was found to be optimum at 3 h under the consideration of the removal efficiencies ofCOD and total nitrogen. The real-time control system not only exhibited a better nitrogen removal efficiency than the fixed-time control operation, but it also showed a stable effluent quality during the change of HRT from 3to 8 h. Good operation stability was demonstrated even when a very high disturbance of the influent loading occurred. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/04/20 alle ore 15:29:09