Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Modelling of Biodegradation Kinetics for Binary Mixtures of Substituted Phenols in Sequential Bioreactors |
| Abstract | Substituted phenols are extensively produced and utilized in chemical industry and therefore they are largely present in wastewater. In this paper we considered phenolic mixtures which are representative of industrial wastewater, usually containing multiple substrates. In these conditions, degradation process is strongly affected by the complex interactions among substrates, which include enhancement, inhibition and co-metabolism so a process model is an useful tool to explore and predict the process evolution. Objective of this work was to formulate a kinetic model for the biodegradation of binary mixtures performed in a sequencing batch reactor (SBR). Two model mixtures were investigated: a 4-nitrophenol (4NP) and 2,4-dimethylphenol (2,4DMP) mixture, and a more recalcitrant mixture of 4NP and 2,4-dichlorophenol (2,4DCP). Kinetic tests were performed at different feed concentrations, with single compounds and mixtures and each biodegradation process was kinetically characterized. Haldane equation was utilised to model the substrate inhibited kinetics for single compound while for the mixtures the model was modified with a "switching function" to account the mutual substrate interaction. The proposed model was initially calibrated with a preliminary set of data to evaluate the best-fitting parameters, then validated by simulating different runs with the estimated parameters. Satisfactory results with high correlation coefficients (>= 0.98) and reliable predictions were obtained for the two investigated mixtures. |
| Source | 11th International Conference on Chemical & Process Engineering, Milano, 02-06-2013Chemical Engineering transactions 32, pp. 1081–1086 |
| Keywords | binary mixtures; biodegradation; sequential bioreactor; |
| Journal | Chemical Engineering transactions |
| Editor | AIDIC, Milano, Italia |
| Year | 2013 |
| Type | Contributo in atti di convegno |
| DOI | 10.3303/CET1332181 |
| Authors | Angelucci, Domenica Mosca; Annesini, M. Cristina; Tomei, M. Concetta |
| Text | 343628 2013 10.3303/CET1332181 ISI Web of Science WOS 000335952100181 binary mixtures; biodegradation; sequential bioreactor; Modelling of Biodegradation Kinetics for Binary Mixtures of Substituted Phenols in Sequential Bioreactors Angelucci, Domenica Mosca; Annesini, M. Cristina; Tomei, M. Concetta Universita La Sapienza Roma Italia Substituted phenols are extensively produced and utilized in chemical industry and therefore they are largely present in wastewater. In this paper we considered phenolic mixtures which are representative of industrial wastewater, usually containing multiple substrates. In these conditions, degradation process is strongly affected by the complex interactions among substrates, which include enhancement, inhibition and co metabolism so a process model is an useful tool to explore and predict the process evolution. Objective of this work was to formulate a kinetic model for the biodegradation of binary mixtures performed in a sequencing batch reactor SBR . Two model mixtures were investigated a 4 nitrophenol 4NP and 2,4 dimethylphenol 2,4DMP mixture, and a more recalcitrant mixture of 4NP and 2,4 dichlorophenol 2,4DCP . Kinetic tests were performed at different feed concentrations, with single compounds and mixtures and each biodegradation process was kinetically characterized. Haldane equation was utilised to model the substrate inhibited kinetics for single compound while for the mixtures the model was modified with a switching function to account the mutual substrate interaction. The proposed model was initially calibrated with a preliminary set of data to evaluate the best fitting parameters, then validated by simulating different runs with the estimated parameters. Satisfactory results with high correlation coefficients >= 0.98 and reliable predictions were obtained for the two investigated mixtures. Published version 32 11th International Conference on Chemical Process Engineering Milano 02 06 2013 Internazionale Contributo Contributo in atti di convegno AIDIC 1974 9791 Chemical Engineering transactions Chemical Engineering transactions Chem.l Eng. trans. Chemical Engineering transactions. C.E.T. domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA TA.P07.002.005 Rimozione di composti xenobiotici da acque di scarico |