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Effect of bioavailability on the fate of hydrophobic organic compounds and metal in treatment of young landfill leachate by membrane bioreactor.

Zolfaghari, Mehdi; Drogui, Patrick; Brar, Satinder Kaur; Buelna, Gerardo; Dubé, Rino (2016). Effect of bioavailability on the fate of hydrophobic organic compounds and metal in treatment of young landfill leachate by membrane bioreactor. Chemosphere , vol. 161 . p. 390-399. DOI: 10.1016/j.chemosphere.2016.07.021.

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Résumé

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 PO₄³⁻, 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.

Type de document: Article
Mots-clés libres: landfill leachate; Di 2-ethyl hexyl phthalate; heavy metals; submerged membrane bioreactor; biodegradation; bioavailability
Centre: Centre Eau Terre Environnement
Date de dépôt: 03 mai 2018 18:43
Dernière modification: 03 mai 2018 18:43
URI: http://espace.inrs.ca/id/eprint/4714

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