| Title | Analysis of the performance and criteria for rational design of a sequencing batch reactor for xenobiotic removal |
| Abstract | Substrate toxicity can impose operability challenges in the biological treatment of xenobiotic compounds. These can arise from transients in the feed to conventional continuous processes, as well as in more challenging systems, sequencing batch reactors (SBRs), whose operation is always inherently dynamic. Via the use of the classic Haldane model for microbial toxicity, and unsteady-state material balance equations for SBR operation, we have analysed the behaviour of an SBR reactor operating over multiple cycles and have shown that both high performance and low performance can be obtained depending on the feed substrate concentration and the selected SBR exchange ratio. That is, both the intrinsic microbial kinetics as well as the selection of process operating conditions can lead either to high performance (high removal efficiency) or low performance (low removal efficiency) operation. Using this approach, we have also discussed the performance for the SBR treatment of 2 "real" substrates possessing widely different kinetic parameters, showing the impact of these parameters, as well as process operating conditions, on the operability of SBR biotreatment systems handling xenobiotic compounds. This could be of significant value to practitioners wishing to select high performance operating regimes for the treatment of a specific xenobiotic compound. To our knowledge, this is the first systematic study of the impact of substrate toxicity on SBR operability, and is also a first step in modeling the impact of substrate detoxification, via the use of discontinuous Two-Phase Partitioning Bioreactors, on the dynamic performance of xenobiotic biotreatment processes. (C) 2013 Elsevier B.V. All rights reserved. |
| Source | Chemical engineering journal ( Print) 235, pp. 167–175 |
| Keywords | SBRModelingXenobioticsBioremediation |
| Journal | Chemical engineering journal ( Print) |
| Editor | Elsevier Sequoia, Lausanne, Svizzera |
| Year | 2014 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.cej.2013.09.004 |
| Authors | Annesini, M. Cristina; Piemonte, Vincenzo; Tomei, M. Concetta; Daugulis, Andrew J. |
| Text | 323453 2014 10.1016/j.cej.2013.09.004 ISI Web of Science WOS 000328804200019 SBR Modeling Xenobiotics Bioremediation Analysis of the performance and criteria for rational design of a sequencing batch reactor for xenobiotic removal Annesini, M. Cristina; Piemonte, Vincenzo; Tomei, M. Concetta; Daugulis, Andrew J. Sapienza University Rome; University Campus Bio Medico Rome Italy; Consiglio Nazionale delle Ricerche CNR ; Queens University Canada Substrate toxicity can impose operability challenges in the biological treatment of xenobiotic compounds. These can arise from transients in the feed to conventional continuous processes, as well as in more challenging systems, sequencing batch reactors SBRs , whose operation is always inherently dynamic. Via the use of the classic Haldane model for microbial toxicity, and unsteady state material balance equations for SBR operation, we have analysed the behaviour of an SBR reactor operating over multiple cycles and have shown that both high performance and low performance can be obtained depending on the feed substrate concentration and the selected SBR exchange ratio. That is, both the intrinsic microbial kinetics as well as the selection of process operating conditions can lead either to high performance high removal efficiency or low performance low removal efficiency operation. Using this approach, we have also discussed the performance for the SBR treatment of 2 real substrates possessing widely different kinetic parameters, showing the impact of these parameters, as well as process operating conditions, on the operability of SBR biotreatment systems handling xenobiotic compounds. This could be of significant value to practitioners wishing to select high performance operating regimes for the treatment of a specific xenobiotic compound. To our knowledge, this is the first systematic study of the impact of substrate toxicity on SBR operability, and is also a first step in modeling the impact of substrate detoxification, via the use of discontinuous Two Phase Partitioning Bioreactors, on the dynamic performance of xenobiotic biotreatment processes. C 2013 Elsevier B.V. All rights reserved. 235 Analysis of the performance and criteria for rational design of a sequencing batch reactor for xenobiotic removal CEJ_14.pdf Articolo in rivista Elsevier Sequoia 1385 8947 Chemical engineering journal Print Chemical engineering journal Print Chem. eng. j. Print Chemical engineering journal. Print mariaconcetta.tomei TOMEI MARIA CONCETTA TA.P07.002.005 Rimozione di composti xenobiotici da acque di scarico |
