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DatoValore
TitlePost-aerobic treatment to enhance the removal of conventional and emerging micropollutants in the digestion of waste sludge
AbstractLow content of micropollutants in sewage sludge, essential to allow its safe re-use in agriculture, requires effective removals during the digestion phase. To this purpose, we investigated the performance of the anaerobic-aerobic sequential digestion process applied to real waste sludge in the removal of several classes of standard pollutants, i.e. extractable organic halogens (EOXs), polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), di(2-ethylhexyl)phthalate and alkylphenolethoxylates. In addition, emerging pollutants were also investigated based on their widespread occurrence and on their physicochemical characteristics and eco-toxicological relevance: quaternary ammonium compounds, a number of pharmaceuticals and selected biocides. The anaerobic step was conducted at mesophilic conditions, while two operating temperatures were tested for the post-aerobic treatment, i.e. 20 and 37 °C, respectively. Results showed that the post-aerobic digestion step enhanced the removal of all investigated standard and emerging micropollutants, even in presence of high accumulation in the anaerobic digestate (occurred for some PAHs and PCB congeners). Increased removals (up to 30%) have been generally observed at 37 °C aerobic temperature in comparison with tests at T = 20 °C for all investigated organic micropollutants, with the only exception of halogenated compounds (i.e. EOXs and PCBs). Low biodegradability and high bioaccumulation of the investigated pollutants were successfully faced by the sequential process, which has been demonstrated as an effective alternative solution to produce digested sludge for safe agricultural re-use.
SourceWaste management (Elmsford) 96, pp. 36–46
KeywordsSequential anaerobic-aerobic digestionOrganic micropollutantsEmerging micropollutantsHeavy metalsEnhanced digestionSewage sludge
JournalWaste management (Elmsford)
EditorPergamon Press,, New York, Stati Uniti d'America
Year2019
TypeArticolo in rivista
DOI10.1016/j.wasman.2019.07.013
AuthorsTomei M.C.; Mosca Angelucci D.; Mascolo G.; Kunkel U.
Text420419 2019 10.1016/j.wasman.2019.07.013 Scopus 2 s2.0 85068797419 ISI Web of Science WOS WOS 000482245200005 Sequential anaerobic aerobic digestion Organic micropollutants Emerging micropollutants Heavy metals Enhanced digestion Sewage sludge Post aerobic treatment to enhance the removal of conventional and emerging micropollutants in the digestion of waste sludge Tomei M.C.; Mosca Angelucci D.; Mascolo G.; Kunkel U. Water Research Institute, C.N.R., Via Salaria km 29.300, Monterotondo Stazione Rome , CP 10, 00015, Monterotondo Stazione Rome , Italy; Water Research Institute, C.N.R., Via Salaria km 29.300, Monterotondo Stazione Rome , CP 10, 00015, Monterotondo Stazione Rome , Italy; Water Research Institute, C.N.R., Via de Blasio 5, Bari BA , 70132, Italy; Bavarian Environment Agency, Burgermeister Ulrich Str. 160, Augsburg, 86179, Augsburg, Germany Low content of micropollutants in sewage sludge, essential to allow its safe re use in agriculture, requires effective removals during the digestion phase. To this purpose, we investigated the performance of the anaerobic aerobic sequential digestion process applied to real waste sludge in the removal of several classes of standard pollutants, i.e. extractable organic halogens EOXs , polychlorinated biphenyls PCBs , polycyclic aromatic hydrocarbons PAHs , di 2 ethylhexyl phthalate and alkylphenolethoxylates. In addition, emerging pollutants were also investigated based on their widespread occurrence and on their physicochemical characteristics and eco toxicological relevance quaternary ammonium compounds, a number of pharmaceuticals and selected biocides. The anaerobic step was conducted at mesophilic conditions, while two operating temperatures were tested for the post aerobic treatment, i.e. 20 and 37 °C, respectively. Results showed that the post aerobic digestion step enhanced the removal of all investigated standard and emerging micropollutants, even in presence of high accumulation in the anaerobic digestate occurred for some PAHs and PCB congeners . Increased removals up to 30% have been generally observed at 37 °C aerobic temperature in comparison with tests at T = 20 °C for all investigated organic micropollutants, with the only exception of halogenated compounds i.e. EOXs and PCBs . Low biodegradability and high bioaccumulation of the investigated pollutants were successfully faced by the sequential process, which has been demonstrated as an effective alternative solution to produce digested sludge for safe agricultural re use. 96 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85068797419 origin=inward Post aerobic treatment to enhance the removal of conventional and emerging micropollutants in the digestion of waste sludge Pdf dell articolo Post aerobic treatment to enhance the removal of conventional and emerging micropollutants in the digestion of waste sludge Micropollutant WM 2019.pdf Articolo in rivista Pergamon Press, 0956 053X Waste management Elmsford Waste management Elmsford Waste management. Elmsford domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA giuseppe.mascolo MASCOLO GIUSEPPE ROUTES Novel processing routes for effective sewage sludge management