title: Integrated treatment of landfill leachates including electrooxidation at pilot plant scale.
abstract: This paper reports the integration of advanced and conventional technologies to deal with the treatment of landfill leachates. The raw leachate, with average values of COD=4430 mg/L and N-NH(4)(+)=1225 mg/L, was first treated on site by an activated sludge large-scale process reducing the former parameters to 1750 mg/L (av.) of COD and 750 mg/L (av.) of N-NH(4)(+). Next, 50 L/h of the effluent were pumped to a pilot plant that included Fenton oxidation followed by an electrooxidation unit, provided with boron doped diamond anodes (anode area=1.05 m(2)); almost complete removal of the organic matter and ammonium nitrogen was achieved. Comparison of the results with those obtained in the laboratory (70 cm(2) of anode area) was performed observing a similar performance in the kinetics of COD removal, while differences were found in the ammonium removal rates. The specific energy consumption necessary to electro-oxidize the organic load below the disposal limit (COD<160 mg/L) at pilot plant scale was 35 kWh/m(3).
authors.affiliation: Department of Chemical Engineering, Universidad de Cantabria, Av. de los Castros s/n, 39005 Santander, Spain. urtiaga@unican.es
authors.forename: Ane
authors.initials: A
authors.lastname: Urtiaga
authors.forename: Ana
authors.initials: A
authors.lastname: Rueda
authors.forename: Angela
authors.initials: A
authors.lastname: Anglada
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Ortiz
mesh_terms: D000641:Ammonia / Q000302:isolation & purification; D055664:Electrochemical Techniques; D006861:Hydrogen Peroxide; D007501:Iron; D007700:Kinetics; D010084:Oxidation-Reduction; D010865:Pilot Projects; D012722:Sewage; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: C045076:Fenton's reagent; D012722:Sewage; D014874:Water Pollutants, Chemical; D000641:Ammonia; D006861:Hydrogen Peroxide; D007501:Iron