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Optimization of landfill leachate management in the aftercare period
School of Engineering, Aalto University, Espoo.
LuleƄ University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
School of Engineering, Aalto University, Espoo.
2012 (English)In: Waste Management & Research, ISSN 0734-242X, E-ISSN 1096-3669, Vol. 30, no 8, p. 789-799Article in journal (Refereed) Published
Abstract [en]

The management of sanitary landfills after closure is an important engineering, economic and sustainability issue and is referred to as the greatest unresolved landfill challenge. Most sanitary landfills are operated according to the dry tomb principle, resulting in aftercare periods of hundreds of years. To study landfill body behaviour, long-term leachate emissions were studied with anaerobic landfill simulators, and a forecast model was developed targeting the behaviour of NH4-N, COD and chlorides as a function of temperature and the L/S-ratio (liquid-to-solid). It was found that NH4-N is the decisive factor in leachate management, requiring the highest L/S-ratio (around 6) to meet the direct discharge limit values. Various scenarios were constructed to find optimal leachate management strategies both in large (waste height H = 25 m) and medium-sized landfills (H = 10 m) with corresponding temperature ranges. The results show that by minimizing the aftercare period length with leachate pre-treatment and recirculation, both sustainability and economic benefits can be achieved. The results provide new views on how to manage the long-term leachate aftercare problem. In the case of large landfills, further efforts are needed to reach stabilization within a reasonable time frame.

Place, publisher, year, edition, pages
2012. Vol. 30, no 8, p. 789-799
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-5853DOI: 10.1177/0734242X12440483ISI: 000306837200005PubMedID: 22605021Scopus ID: 2-s2.0-84864744230Local ID: 40a3a6fc-5932-46fd-930d-ea10e0423213OAI: oai:DiVA.org:ltu-5853DiVA, id: diva2:978729
Note
Validerad; 2012; 20120521 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2023-05-08Bibliographically approved

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Pelkonen, Markku

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