title: Landfill leachate treatment by sequential membrane bioreactor and electro-oxidation processes.
abstract: Combination of high performance membrane bioreactor (MBR) equipped with ultrafiltration and electro-oxidation process (EOP) by boron-doped diamond electrode (BDD) was used to effectively treat highly contaminated old landfill leachate. MBR and EOP were optimized for raw and pretreated landfill leachate. Seasonal changes dramatically affected the both processes' performance, as the landfill leachate was ¾ more concentrated in winter. For MBR, organic load rate of 1.2 gCOD/L/day and sludge retention time of 80 days was considered as the optimum operating condition in which COD, TOC, NH4+and phosphorous removal efficiencies reached the average of 63, 35, 98 and 52%, respectively. The best performance of EOP was in current intensity of 3 A with treatment of time of 120 min. Effluent of electro-oxidation was more toxic due to the presence of radicals and organochlorinated compounds. These compounds were removed by stripping or assimilation of sludge if EOP was used as a pretreatment method. Furthermore, the energy consumption of EOP was decreased from 22 to 16 KWh/m3for biologically treated and raw landfill leachate, respectively.
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: Mehdi
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.
authors.forename: Karama
authors.initials: K
authors.lastname: Jardak
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: Patrick
authors.initials: P
authors.lastname: Drogui
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: Satinder Kaur
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: Gerardo
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: Rino
authors.initials: R
authors.lastname: Dubé
mesh_terms: D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D001895:Boron; D018130:Diamond; D004566:Electrodes; D004867:Equipment Design; D006812:Humic Substances; D010084:Oxidation-Reduction; D011792:Quebec; D012722:Sewage; D014462:Ultrafiltration; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000378:metabolism
chemical_list: D006812:Humic Substances; D012722:Sewage; D014874:Water Pollutants, Chemical; D018130:Diamond; D001895:Boron
keywords: Di 2-ethyl hexyl phthalate; Electro-oxidation process; Energy consumption; Landfill leachate; Membrane bioreactor; Removal efficiency