Institutional Repository [SANDBOX]
Technical University of Crete
EN  |  EL

Search

Browse

My Space

Treatment of municipal landfill leachate by catalytic wet air oxidation: Assessment of the role of operating parameters by factorial design

Anglada Angela, Urtiaga Ane , Ortiz Inmaculada, Mantzavinos Dionysis, Diamantopoulos Evaggelos

Simple record


URIhttp://purl.tuc.gr/dl/dias/E25228BB-7791-40DD-BB2A-927CE89C5061-
Identifierhttps://doi.org/10.1016/j.wasman.2011.03.023-
Identifierhttps://www.sciencedirect.com/science/article/pii/S0956053X11001681-
Languageen-
Extent8 pagesen
TitleTreatment of municipal landfill leachate by catalytic wet air oxidation: Assessment of the role of operating parameters by factorial designen
CreatorAnglada Angelaen
CreatorUrtiaga Ane en
CreatorOrtiz Inmaculadaen
CreatorMantzavinos Dionysisen
CreatorΜαντζαβινος Διονυσηςel
CreatorDiamantopoulos Evaggelosen
CreatorΔιαμαντοπουλος Ευαγγελοςel
PublisherElsevieren
Content SummaryThe wet air oxidation (WAO) of municipal landfill leachate catalyzed by cupric ions and promoted by hydrogen peroxide was investigated. The effect of operating conditions such as WAO treatment time (15–30 min), temperature (160–200 °C), Cu2+ concentration (250–750 mg L−1) and H2O2 concentration (0–1500 mg L−1) on chemical oxygen demand (COD) removal was investigated by factorial design considering a two-stage, sequential process comprising the heating-up of the reactor and the actual WAO. The leachate, at an initial COD of 4920 mg L−1, was acidified to pH 3 leading to 31% COD decrease presumably due to the coagulation/precipitation of colloidal and other organic matter. During the 45 min long heating-up period of the WAO reactor under an inert atmosphere, COD removal values up to 35% (based on the initial COD value) were recorded as a result of the catalytic decomposition of H2O2 to reactive hydroxyl radicals. WAO at 2.5 MPa oxygen partial pressure advanced treatment further; for example, 22 min of oxidation at 200 °C, 250 mg L−1 Cu2+ and 0–1500 mg L−1 H2O2 resulted in an overall (i.e. including acidification and heating-up) COD reduction of 78%. Amongst the operating variables in question, temperature had the strongest influence on both the heating-up and WAO stages, while H2O2 concentration strongly affected the former and reaction time the latter. Nonetheless, the effects of temperature and H2O2 concentration were found to depend on the concentration levels of catalyst as suggested by the significance of their 3rd order interaction term.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2015-11-19-
Date of Publication2011-
SubjectWet oxidationen
SubjectWaste managementen
Bibliographic CitationÁ. Anglada, A Urtiaga, I. Ortiz, D. Mantzavinos and E. Diamadopoulos, "Treatment of municipal landfill leachate by catalytic wet air oxidation: Assessment of the role of operating parameters by factorial design," Waste Manage., vol. 31, no. 8, pp. 1833-1840, Aug. 2011. doi: 10.1016/j.wasman.2011.03.023en

Services

Statistics