In this paper, the biodegradation process of 4-nitrophenol (4NP) in a sequencing batch reactor has been investigated. Kinetic tests have been carried out on biomass grown on mixed substrate (4NP plus biogenic substrate) both in the presence of a biogenic substrate fraction in the feed and with 4NP as the sole carbon source. Removal kinetics for all tests is well described by the typical substrate inhibition pattern as predicted by the Haldane equation. In both sets, estimated kinetic parameters are very similar: no beneficial effect of the biogenic fraction is observed on the 4NP removal while increasing trend of 4NP maximum removal rate with the 4NP/CODTOT ratio in the feed has been observed. This finding has been modelled by estimating the fraction of the total biomass involved in 4NP biodegradation as a function of 4NP concentration in the feed. High removal rates, short acclimation times and good settling characteristics of produced sludge (observed during the whole working period) confirm the suitability of periodic systems in enhancing the bacterial potentialities for biodegradation of xenobiotic compounds. (C) 2003 Elsevier Science Ltd. All rights reserved.

Kinetics of 4-nitrophenol biodegradation in a sequencing batch reactor / M., Concetta Tomei; Annesini, Maria Cristina; Roberta, Luberti; Giorgia, Cento; Alessandro, Senia. - In: WATER RESEARCH. - ISSN 0043-1354. - 37:16(2003), pp. 3803-3814. [10.1016/s0043-1354(03)00297-5]

Kinetics of 4-nitrophenol biodegradation in a sequencing batch reactor

ANNESINI, Maria Cristina;
2003

Abstract

In this paper, the biodegradation process of 4-nitrophenol (4NP) in a sequencing batch reactor has been investigated. Kinetic tests have been carried out on biomass grown on mixed substrate (4NP plus biogenic substrate) both in the presence of a biogenic substrate fraction in the feed and with 4NP as the sole carbon source. Removal kinetics for all tests is well described by the typical substrate inhibition pattern as predicted by the Haldane equation. In both sets, estimated kinetic parameters are very similar: no beneficial effect of the biogenic fraction is observed on the 4NP removal while increasing trend of 4NP maximum removal rate with the 4NP/CODTOT ratio in the feed has been observed. This finding has been modelled by estimating the fraction of the total biomass involved in 4NP biodegradation as a function of 4NP concentration in the feed. High removal rates, short acclimation times and good settling characteristics of produced sludge (observed during the whole working period) confirm the suitability of periodic systems in enhancing the bacterial potentialities for biodegradation of xenobiotic compounds. (C) 2003 Elsevier Science Ltd. All rights reserved.
2003
haldane equation; sequencing batch reactor; 4-nitrophenol biodegradation; xenobiotics; kinetic parameters
01 Pubblicazione su rivista::01a Articolo in rivista
Kinetics of 4-nitrophenol biodegradation in a sequencing batch reactor / M., Concetta Tomei; Annesini, Maria Cristina; Roberta, Luberti; Giorgia, Cento; Alessandro, Senia. - In: WATER RESEARCH. - ISSN 0043-1354. - 37:16(2003), pp. 3803-3814. [10.1016/s0043-1354(03)00297-5]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/15024
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? 2
  • Scopus 109
  • ???jsp.display-item.citation.isi??? 108
social impact