Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Treatment of synthetic tannery wastewater in a continuous two-phase partitioning bioreactor: Biodegradation of the organic fraction and chromium separation |
| Abstract | A continuous two-phase partitioning bioreactor has been tested for treating a synthetic leather tannery wastewater with the objective of achieving effective removal of the organic load and complete chromium separation. The bioreactor was operated with 5.5 m of Hytrel 8206 polymeric tubing fed with a synthetic tannery wastewater consisting of 4-chlorophenol (concentration in the range of 1000-2500 mg L-1) and potassium dichromate (100 mg L-1 as Cr (VI)), and immersed in a 4 L bioreactor containing the microbial culture acclimatized to the compound. This configuration prevents the direct contact between the toxic wastewater and the microorganisms themselves, and provides the gradual organic substrate delivery through the tubing walls. Abiotic partition and mass transfer tests were performed to investigate the transport of dichromate and 4-chlorophenol across the tubing into the bulk phase of the bioreactor. No appreciable mass transfer of dichromate was detected. During biotic testing, the influent organic load in tubing has been varied in the range of 19-94 mg h(-1) and the hydraulic retention time from 3 to 6 h. Achieved biological removal efficiencies were in the range of 89-95% for the highest applied loads. Process kinetics (which included consideration of both mass transfer and biological rates) were evaluated, and it was found that the increased load did not result in any decrease in 4-chlorophenol removal rate. This work has shown that the continuous two-phase partitioning bioreactor has significant potential in enhancing the biological treatment of tannery wastewater, which is a typical representative of industrial "hostile" wastewater. (C) 2017 Elsevier Ltd. All rights reserved. |
| Source | Journal of cleaner production 152, pp. 321–329 |
| Keywords | Continuous two-phase partitioning bioreactorTannery wastewaterBiological treatmentChromium separationPolymer tubing |
| Journal | Journal of cleaner production |
| Editor | Butterworth-Heinemann,, Oxford, Regno Unito |
| Year | 2017 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.jclepro.2017.03.135 |
| Authors | Mosca Angelucci, Domenica; Stazi, Valentina; Daugulis, Andrew J.; Tomei, M. Concetta |
| Text | 372085 2017 10.1016/j.jclepro.2017.03.135 ISI Web of Science WOS 000401379700029 Scopus 2 s2.0 85017648551 Continuous two phase partitioning bioreactor Tannery wastewater Biological treatment Chromium separation Polymer tubing Treatment of synthetic tannery wastewater in a continuous two phase partitioning bioreactor Biodegradation of the organic fraction and chromium separation Mosca Angelucci, Domenica; Stazi, Valentina; Daugulis, Andrew J.; Tomei, M. Concetta Water Research Institute, C.N.R., Via Salaria km 29.300, CP 10, 00015, Monterotondo Stazione, Rome, Italy; Department of Chemical Engineering, Queen s University, Kingston, Ontario K7L 3N6, Canada A continuous two phase partitioning bioreactor has been tested for treating a synthetic leather tannery wastewater with the objective of achieving effective removal of the organic load and complete chromium separation. The bioreactor was operated with 5.5 m of Hytrel 8206 polymeric tubing fed with a synthetic tannery wastewater consisting of 4 chlorophenol concentration in the range of 1000 2500 mg L 1 and potassium dichromate 100 mg L 1 as Cr VI , and immersed in a 4 L bioreactor containing the microbial culture acclimatized to the compound. This configuration prevents the direct contact between the toxic wastewater and the microorganisms themselves, and provides the gradual organic substrate delivery through the tubing walls. Abiotic partition and mass transfer tests were performed to investigate the transport of dichromate and 4 chlorophenol across the tubing into the bulk phase of the bioreactor. No appreciable mass transfer of dichromate was detected. During biotic testing, the influent organic load in tubing has been varied in the range of 19 94 mg h 1 and the hydraulic retention time from 3 to 6 h. Achieved biological removal efficiencies were in the range of 89 95% for the highest applied loads. Process kinetics which included consideration of both mass transfer and biological rates were evaluated, and it was found that the increased load did not result in any decrease in 4 chlorophenol removal rate. This work has shown that the continuous two phase partitioning bioreactor has significant potential in enhancing the biological treatment of tannery wastewater, which is a typical representative of industrial hostile wastewater. C 2017 Elsevier Ltd. All rights reserved. 152 Published version https //biblioproxy.cnr.it 2114/science/article/pii/S0959652617305875 via%3Dihub Treatment of synthetic tannery wastewater in continuous two phase partitioning bioreactor biodegradation of organic fraction and chromium separation Pdf dell articolo Treatment of synthetic tannery wastewater in a continuous two phase partitioning bioreactor biodegradation of organic fraction and chromium separation JCP2017_Treatment of synthetic tannery wastewater.pdf Articolo in rivista Butterworth Heinemann, 0959 6526 Journal of cleaner production Journal of cleaner production J. clean. prod. Journal of cleaner production. STAZI VALENTINA domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA TA.P07.002.005 Rimozione di composti xenobiotici da acque di scarico |