title: Effect of bioavailability on the fate of hydrophobic organic compounds and metal in treatment of young landfill leachate by membrane bioreactor.
abstract: Complex dissolved organic matter (DOM) present in landfill leachate provides reliable media for adsorption of highly hydrophobic contaminants, such as Di 2-ethyl hexyl phthalate (DEHP). In this research, the feasibility of submerged membrane bioreactor (SMBR) for treatment of landfill leachate (LFL) was determined. Later, the operating conditions were optimized for removal of DEHP, COD, NH4(+) and PO4(3-), and finally the effect of bioavailability was examined by introduction of different concentrations of humic acid into the influent. The result revealed that presence of complex agglomerated organic compounds increased the removal efficiency of DEHP and COD, even though DEHP biodegradation rate in sludge dramatically decreased (from 58.8% to 12.8%). MBR retention of different metals in the absence and in the presence of recalcitrant DOM was also studied. Like DEHP, ternary interaction between metals, DOM, and sludge play a pivotal role in their removal efficiency and their concentration in sludge.
authors.affiliation: Institut National de la Recherche Scientifique-Eau, Terre et Environnement (INRS-ETE), Université du Québec, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Zolfaghari
authors.affiliation: Institut National de la Recherche Scientifique-Eau, Terre et Environnement (INRS-ETE), Université du Québec, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada. Electronic address: patrick.drogui@ete.inrs.ca.
authors.forename: P
authors.initials: P
authors.lastname: Droguia
authors.affiliation: Institut National de la Recherche Scientifique-Eau, Terre et Environnement (INRS-ETE), Université du Québec, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada.
authors.forename: S K
authors.initials: SK
authors.lastname: Brar
authors.affiliation: Centre de Recherche Industrielle du Québec (CRIQ), 333 rue Franquet, Québec, QC, G1P 4C7, Canada.
authors.forename: G
authors.initials: G
authors.lastname: Buelna
authors.affiliation: Centre de Recherche Industrielle du Québec (CRIQ), 333 rue Franquet, Québec, QC, G1P 4C7, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Dubé
mesh_terms: D000327:Adsorption; D064751:Ammonium Compounds / Q000378:metabolism*; D001673:Biodegradation, Environmental; D001682:Biological Availability; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D004051:Diethylhexyl Phthalate / Q000378:metabolism*; D006812:Humic Substances; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D008670:Metals / Q000378:metabolism*; D010710:Phosphates / Q000378:metabolism*; D012037:Refuse Disposal; D012722:Sewage; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D064751:Ammonium Compounds; D006812:Humic Substances; D008567:Membranes, Artificial; D008670:Metals; D010710:Phosphates; D012722:Sewage; D014874:Water Pollutants, Chemical; D004051:Diethylhexyl Phthalate
keywords: Bioavailability; Biodegradation; Di 2-ethyl hexyl phthalate; Heavy metals; Landfill leachate; Submerged membrane bioreactor