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DatoValore
TitleKinetics of 4-Nitrophenol biodegradation in a sequencing batch reactor
AbstractIn 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 benecial 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 forbiodegradation of xenobiotic compounds
Keywords4-Nitrophenol biodegradationXenobioticsSequencing batch reactorKinetic parametersHaldane equation
Year2003
TypeArticolo in rivista
AuthorsTOMEI M.C (1), ANNESINI M.C.(2), LUBERTI R.(3), CENTO G. (4)& SENIA A (5)
Text42072 2003 4 Nitrophenol biodegradation Xenobiotics Sequencing batch reactor Kinetic parameters Haldane equation Kinetics of 4 Nitrophenol biodegradation in a sequencing batch reactor TOMEI M.C 1 , ANNESINI M.C. 2 , LUBERTI R. 3 , CENTO G. 4 SENIA A 5 1 CNR Ist. di ricerca sulle acque. 2,4,5 Dipartimento di Ingegneria Chimica, Universita degli Studi di Roma ‘‘La Sapienza’’ 3 Borsista CNR Ist. di ricerca sulle acque 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 benecial 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 forbiodegradation of xenobiotic compounds 37 Articolo in rivista mariaconcetta.tomei TOMEI MARIA CONCETTA