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Titolo:
Improvement of nitrogen-removal efficiency using immobilized microorganisms with oxidation-reduction potential monitoring
Autore:
Chen, KC; Chen, JJ; Houng, JY;
Indirizzi:
Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu, Taiwan Natl Tsing Hua Univ Hsinchu Taiwan niv, Dept Chem Engn, Hsinchu, Taiwan I Shou Univ, Dept Chem Engn, Kaohsiung, Taiwan I Shou Univ Kaohsiung Taiwan ou Univ, Dept Chem Engn, Kaohsiung, Taiwan
Titolo Testata:
JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY
fascicolo: 5, volume: 25, anno: 2000,
pagine: 229 - 234
SICI:
1367-5435(200011)25:5<229:IONEUI>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
REAL-TIME CONTROL; ACTIVATED-SLUDGE PROCESS; INTERMITTENT-AERATION; ORP; SYSTEM; DIGESTION; BACTERIA;
Keywords:
PVA immobilization; intermittent aeration process; oxidation-reduction potential; nitrification; denitrification;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, KC Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu, Taiwan Natl Tsing Hua Univ Hsinchu Taiwan Chem Engn, Hsinchu, Taiwan
Citazione:
K.C. Chen et al., "Improvement of nitrogen-removal efficiency using immobilized microorganisms with oxidation-reduction potential monitoring", J IND MIC B, 25(5), 2000, pp. 229-234

Abstract

The use of an immobilized - cell reactor for simultaneous carbon - nitrogen removal in wastewater with the monitoring of oxidation-reduction potential (ORP) in an intermittent aeration (IA) process was investigated. Under alternating aerated and nonaerated conditions, the ORP-time profile showed distinctive turning points that directly correlated with changes in the system chemistry and biological activity. The aeration ratio, defined as aeration time/cycle time, was optimum at 50% for obtaining the maximum efficiency of denitrification accompanied by sufficient nitrification. High simultaneous carbon-nitrogen removal efficiency could be achieved using the immobilized-cell reactor by applying the IA process. More than 90% of chemical oxygen demand (COD) -removal efficiency and over 80% of total nitrogen- removal efficiency were obtained using three aerobic-anoxic cycles per day at an aeration ratio of 50% and with a hydraulic retention time of 10 h.

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Documento generato il 24/09/20 alle ore 08:11:25