Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | BIODEGRADATION OF 4-NITROPHENOL IN A TWO PHASE SEQUENCING BATCH REACTOR: CONCEPT DEMONSTRATION, KINETICS AND MODELLING |
| Abstract | The objectives of this work were to demonstrate the potential of a two-phase sequencing batch reactor in degrading xenobiotics and to evaluate the kinetic parameters leading to a mathematical model of the system. 4- Nitrophenol (4NP), a typical representative of substituted phenols, was selected as the target xenobiotic; this compound has never been remediated in a two-phase bioreactor before. Partition tests were conducted to determine the most appropriate partitioning solvent, and among the three investigated solvents (1-undecanol, 2-undecanone and oleyl alcohol), 2-undecanone was chosen because of its favourable partition coefficient and its negligible emulsionforming tendencies. Moreover, the selected solvent showed satisfactory biocompatibility characteristics with respect to the biomass, with only minor effects on the intrinsic microbial kinetics. Kinetic tests were then performed in a sequencing batch reactor (2-l volume) operated in both conventional one- and two-phase configurations, with the two-phase system showing a significant improvement in the process kinetics in terms of reduced inhibition and increased maximum removal rate. The obtained kinetic parameters suggest that the two-phase sequencing batch system may find full-scale application, as the maximum removal rate kmax (~3 mg 4NP mgVSS-1 day-1) is of the same order of magnitude of heterotrophic bacteria operating in wastewater treatment plants. |
| Source | Applied microbiology and biotechnology 80, pp. 1105–1112 |
| Keywords | TPPB/SBR bioreactorXenobiotic biodegradation4-NitrophenolIndustrial wastewater treatment |
| Journal | Applied microbiology and biotechnology |
| Editor | Springer, Heidelberg ;, Germania |
| Year | 2008 |
| Type | Articolo in rivista |
| DOI | 10.1007/s00253-008-1604-1 |
| Authors | TOMEI M.C. (1) ; ANNESINI M.C. (2); RITA S. (1); DAUGULIS A.J (3) |
| Text | 42290 2008 10.1007/s00253 008 1604 1 ISI Web of Science WOS 000259670500017 TPPB/SBR bioreactor Xenobiotic biodegradation 4 Nitrophenol Industrial wastewater treatment BIODEGRADATION OF 4 NITROPHENOL IN A TWO PHASE SEQUENCING BATCH REACTOR CONCEPT DEMONSTRATION, KINETICS AND MODELLING TOMEI M.C. 1 ; ANNESINI M.C. 2 ; RITA S. 1 ; DAUGULIS A.J 3 1 Water Research Institute, C.N.R., Via Reno 1, 00198 Rome, Italy; 2 Department of Chemical Engineering Materials Environment, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy; 3 Chemical Engineering Department, Queen s University, Kingston, Ontario K7L 3N6, Canada The objectives of this work were to demonstrate the potential of a two phase sequencing batch reactor in degrading xenobiotics and to evaluate the kinetic parameters leading to a mathematical model of the system. 4 Nitrophenol 4NP , a typical representative of substituted phenols, was selected as the target xenobiotic; this compound has never been remediated in a two phase bioreactor before. Partition tests were conducted to determine the most appropriate partitioning solvent, and among the three investigated solvents 1 undecanol, 2 undecanone and oleyl alcohol , 2 undecanone was chosen because of its favourable partition coefficient and its negligible emulsionforming tendencies. Moreover, the selected solvent showed satisfactory biocompatibility characteristics with respect to the biomass, with only minor effects on the intrinsic microbial kinetics. Kinetic tests were then performed in a sequencing batch reactor 2 l volume operated in both conventional one and two phase configurations, with the two phase system showing a significant improvement in the process kinetics in terms of reduced inhibition and increased maximum removal rate. The obtained kinetic parameters suggest that the two phase sequencing batch system may find full scale application, as the maximum removal rate kmax 3 mg 4NP mgVSS 1 day 1 is of the same order of magnitude of heterotrophic bacteria operating in wastewater treatment plants. 80 http //www.springerlink.com/content/7421421r15522376/ MUD=MP Articolo pubblicato su rivista ISI AMBpublished.pdf Articolo in rivista Springer 0175 7598 Applied microbiology and biotechnology Applied microbiology and biotechnology Appl. microbiol. biotechnol. Applied microbiology and biotechnology. Applied microbiology and biotechnology Print mariaconcetta.tomei TOMEI MARIA CONCETTA TA.P07.001.001 Sviluppo di tecnologie depurative a regime non stazionario |