| Title | Enhancing biodegradation of toxic industrial wastewaters in a continuous two-phase partitioning bioreactor operated with effluent recycle |
| Abstract | In this study, we propose the application of a Continuous Two-Phase Partitioning Bioreactor (C-TPPB) operated with the tubing effluent recycle to enhance the biodegradation of toxic substrates in industrial wastewaters under severe loading conditions. Stepwise increasing influent concentrations (from 200 to 900 mg L) of 2,4-dichlorophenol (2,4-DCP) were fed to a C-TPPB operated with Hytrel G3548 tubing to simulate phenolic wastewater. Practically complete 2,4-DCP removal has been achieved during the entire experimental period, but the increased load reduced biodegradation efficiency. At influent concentration of 700 mg L, the first effluent recycle (recycle /influent flow rate ratio = 0.3) was applied: biodegradation efficiency doubled from 40 to 80% and was maintained until influent concentrations of 800 mg L. Higher influent concentrations caused a decrease in 2,4-DCP biodegradation, so the effluent recycle ratio was increased to 0.5 at 900 mg L and, also in this case, the bioreactor showed a fast recovery (~ 24 h) of the biodegradation efficiency at 80%. Mass transfer data analysis showed that the effluent recycle resulted in an increase of the mass transfer coefficient. This positive effect, joined with the reduction of the influent concentrations, demonstrated the feasibility of recycle application in enhancing the C-TPPB performance. |
| Source | Process safety and environmental protection 124, pp. 172–180 |
| Keywords | Industrial wastewater treatmentContinuous two-phase partitioning bioreactor (C-TPPB)Toxic organic compoundsProcess optimizationBiological treatment |
| Journal | Process safety and environmental protection |
| Editor | Elsevier Science, Rugby, Regno Unito |
| Year | 2019 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.psep.2019.02.011 |
| Authors | Tomei M.C.; Mosca Angelucci D. |
| Text | 420416 2019 10.1016/j.psep.2019.02.011 Scopus 2 s2.0 85062002522 ISI Web of Science WOS WOS 000465051000017 Industrial wastewater treatment Continuous two phase partitioning bioreactor C TPPB Toxic organic compounds Process optimization Biological treatment Enhancing biodegradation of toxic industrial wastewaters in a continuous two phase partitioning bioreactor operated with effluent recycle Tomei M.C.; Mosca Angelucci D. Water Research Institute, C.N.R., Via Salaria Km 29.300, Monterotondo Stazione, Rome, 10, 00015, Italy; Water Research Institute, C.N.R., Via Salaria Km 29.300, Monterotondo Stazione, Rome, 10, 00015, Italy. In this study, we propose the application of a Continuous Two Phase Partitioning Bioreactor C TPPB operated with the tubing effluent recycle to enhance the biodegradation of toxic substrates in industrial wastewaters under severe loading conditions. Stepwise increasing influent concentrations from 200 to 900 mg L of 2,4 dichlorophenol 2,4 DCP were fed to a C TPPB operated with Hytrel G3548 tubing to simulate phenolic wastewater. Practically complete 2,4 DCP removal has been achieved during the entire experimental period, but the increased load reduced biodegradation efficiency. At influent concentration of 700 mg L, the first effluent recycle recycle /influent flow rate ratio = 0.3 was applied biodegradation efficiency doubled from 40 to 80% and was maintained until influent concentrations of 800 mg L. Higher influent concentrations caused a decrease in 2,4 DCP biodegradation, so the effluent recycle ratio was increased to 0.5 at 900 mg L and, also in this case, the bioreactor showed a fast recovery 24 h of the biodegradation efficiency at 80%. Mass transfer data analysis showed that the effluent recycle resulted in an increase of the mass transfer coefficient. This positive effect, joined with the reduction of the influent concentrations, demonstrated the feasibility of recycle application in enhancing the C TPPB performance. 124 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85062002522 origin=inward Enhancing biodegradation of toxic industrial wastewater in a continuous two phase partitioning bioreactor operated with effluent recycle Pdf dell articolo Enhancing biodegradation of toxic industrial wastewater in a continuous two phase partitioning bioreactor operated with effluent recycle Tubing_recycle1_PSEP_2019.pdf Articolo in rivista Elsevier Science 0957 5820 Process safety and environmental protection Process safety and environmental protection Process saf. environ. prot. Process safety and environmental protection. Transactions of the Institution of Chemical Engineers. Part B, Process safety and environmental protection domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA |
