Print Email Facebook Twitter Optimizing landfill aeration strategy with a 3-D multiphase model Title Optimizing landfill aeration strategy with a 3-D multiphase model Author van Turnhout, A.G. (TU Delft Geo-engineering) Oonk, Hans (Oonkay!) Scharff, Heijo (NV Afvalzorg Holding) Heimovaara, T.J. (TU Delft Geoscience and Engineering) Department Geoscience and Engineering Date 2020 Abstract In order to reduce the environmental and financial burden for future generations, approaches are needed to shorten aftercare of landfills. Aeration of the waste-body is a promising approach, however, the poor understanding of transport of gas and water through a waste-body makes it difficult to design an effective aeration strategy. The aim of this study is to develop a tool to determine the optimal aeration strategy for landfills. This study presents a comparison of aeration strategies based on the air distribution they generate with a 3-D multiphase model. The implemented theory is based on parameter values obtained from (laboratory) experiments performed under conditions which are similar to those in a full scale landfill. Calibration with field scale gas extraction data from the Dutch pilot site Wieringermeer shows that the model gives a good description of the average gas flow under extraction. Scenario analyses for the case study landfill indicate that injection strategies reach a larger volume fraction of waste with a higher air flow compared with extraction strategies, especially at the bottom of the landfill. Extraction, however, supplies oxygen more homogeneously through-out the waste. An import design criterion is also the distance between the wells. Too large distances lead to ineffective treatment because too large volumes of waste/leachate remain untreated. In addition to the comparison of aeration strategies, an optimal aeration strategy for the pilot site is presented. A combination of (alternating) injection and extraction wells which are maximum 20m apart seems to be the optimal strategy. Subject 3-D multiphase modelAerationDesign criteriaField scaleLandfillsWaste treatment To reference this document use: http://resolver.tudelft.nl/uuid:d4db614b-5912-4045-b06f-25cae3ca968b DOI https://doi.org/10.1016/j.wasman.2019.10.051 Embargo date 2020-05-21 ISSN 0956-053X Source Waste Management, 102, 499-509 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2020 A.G. van Turnhout, Hans Oonk, Heijo Scharff, T.J. Heimovaara Files PDF 1_s2.0_S0956053X19306877_main.pdf 2.49 MB Close viewer /islandora/object/uuid:d4db614b-5912-4045-b06f-25cae3ca968b/datastream/OBJ/view