| Abstract | Landfill leachate is a highly polluted and toxic waste stream harmful to the environment and human health, its biological treatment, even if challenging, offers the opportunity of recovering valuable resources. In this study, we propose the application of an extractive membrane bioreactor equipped with a polymeric tubing, made of Hytrel, as an innovative device able to remove specific organic toxic compounds of the leachate and, at the same time, to produce an effluent rich in valuable chemicals suitable for recovery. The leachate treatment consists in a two-step process: the extraction of specific toxic compounds through the polymeric tubing based on the affinity with the polymer, and their subsequent biodegradation in controlled conditions in the bulk phase of the extractive membrane bioreactor, thus avoiding the direct contact of the microbial consortium with the toxic leachate. Three synthetic streams simulating leachates produced by landfills of typical industrial/hazardous waste, mixed municipal and industrial solid waste, and oil shale industry waste, whose toxic fraction is mainly constituted by phenolic compounds, have been tested. Successful performance was achieved in all the tested conditions, with high removal (>=98%) and biodegradation efficiencies (89-95%) of the toxic compounds. No mass transfer limitations across the tubing occurred during the operation and a marginal accumulation (in the range of 4-7%) into the polymer has been observed. Furthermore, volatile fatty acids and inorganic compounds contained in the leachates were fully recovered in the treated effluent. Feasibility study confirmed the applicability of the proposed bioreactor as a powerful technology able to achieve high toxic removal efficiency in leachate treatment and facilitate resource recovery. |
| Text | 477644 2022 10.1016/j.scitotenv.2021.150892 Scopus 2 s2.0 85117162717 Industrial/hazardous landfill leachate; Extractive membrane bioreactor; Polymeric tubing; Toxic fraction selective removal; Resource recovery Extractive membrane bioreactor to detoxify industrial/hazardous landfill leachate and facilitate resource recovery Mosca Angelucci D.; Donati E.; Tomei M.C. Water Research Institute, National Research Council IRSA CNR , Via Salaria km 29.300, CP 10, Monterotondo Stazione, Rome, 00015, Water Research Institute, National Research Council IRSA CNR , Via Salaria km 29.300, CP 10, 00015 Monterotondo Stazione Rome Italy, , , Italy; Water Research Institute, National Research Council IRSA CNR , Via Salaria km 29.300, CP 10, Monterotondo Stazione, Rome, 00015, Water Research Institute, National Research Council IRSA CNR , Via Salaria km 29.300, CP 10, 00015 Monterotondo Stazione Rome Italy, , , Italy; Institute for Biological Systems, National Research Council ISB CNR , Via Salaria km 29.300, CP 10, Monterotondo Stazione, Rome, 00015, Institute for Biological Systems, National Research Council ISB CNR , Via Salaria km 29.300, CP 10, 00015 Monterotondo Stazione Rome Italy, , Italy Landfill leachate is a highly polluted and toxic waste stream harmful to the environment and human health, its biological treatment, even if challenging, offers the opportunity of recovering valuable resources. In this study, we propose the application of an extractive membrane bioreactor equipped with a polymeric tubing, made of Hytrel, as an innovative device able to remove specific organic toxic compounds of the leachate and, at the same time, to produce an effluent rich in valuable chemicals suitable for recovery. The leachate treatment consists in a two step process the extraction of specific toxic compounds through the polymeric tubing based on the affinity with the polymer, and their subsequent biodegradation in controlled conditions in the bulk phase of the extractive membrane bioreactor, thus avoiding the direct contact of the microbial consortium with the toxic leachate. Three synthetic streams simulating leachates produced by landfills of typical industrial/hazardous waste, mixed municipal and industrial solid waste, and oil shale industry waste, whose toxic fraction is mainly constituted by phenolic compounds, have been tested. Successful performance was achieved in all the tested conditions, with high removal >=98% and biodegradation efficiencies 89 95% of the toxic compounds. No mass transfer limitations across the tubing occurred during the operation and a marginal accumulation in the range of 4 7% into the polymer has been observed. Furthermore, volatile fatty acids and inorganic compounds contained in the leachates were fully recovered in the treated effluent. Feasibility study confirmed the applicability of the proposed bioreactor as a powerful technology able to achieve high toxic removal efficiency in leachate treatment and facilitate resource recovery. 806 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85117162717 origin=inward Extractive membrane bioreactor to detoxify industrial/hazardous landfill leachate and facilitate resource recovery STOTEN 2022.pdf Articolo in rivista Elsevier 0048 9697 Science of the total environment Science of the total environment Sci. total environ. enrica.donati DONATI ENRICA domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA TA.P07.002.005 Rimozione di composti xenobiotici da acque di scarico |
