an official journal of: published by:
Editor in Chief: RAFFAELLO COSSU


  • Nathali Meza - Geoscience & Engineering Department, Delft University of Technology, Netherlands
  • Hans Lammen - AFVALZORG, Netherlands
  • Carmen Cruz - AFVALZORG, Netherlands
  • Timo Heimovaara - Geoscience & Engineering Department, Delft University of Technology, Netherlands
  • Julia Gebert - Geoscience & Engineering Department, Delft University of Technology, Netherlands


Released under CC BY-NC-ND

Copyright: © 2022 CISA Publisher


In-situ aeration of landfills accelerates biodegradation of waste organic matter and hence advances waste stabilization. The spatial outreach of aeration greatly affects stabilization efficiency. This study analyzed the spatial variability of gas composition and flow in 230 wells spread over four compartments of a Dutch landfill which is under in situ aeration since 2017, as well as the carbon extraction efficiency, temperature, and settlement. Flow rates and gas composition in the extraction wells varied strongly. The highest variability was observed in the compartment with the highest water tables with submerged filter screens for most wells, with low flow rates, and elevated ratios of CH4 to CO2, indicating predominance of anaerobic processes (compartment 11Z). The compartment with the most uniform distribution of gas flow rates, composition and lower ratios of CH4 to CO2, suggesting a significant share of aerobic carbon mineralization, also showed higher temperatures, a carbon extraction efficiency, and larger cumulative settlement, all indicative of enhanced microbial activity (compartment 11N). In this compartment, the amount of extracted carbon exceeded the carbon generation predicted from landfill gas modeling by the factor of 2 over the hitherto four years aeration. The effect of water tables on gas flow and the correlation between the flow, and the ratio of CH4 to CO2 appeared weak, indicating that also other factors than water tables influence gas concentration and flow. Future work includes stable isotope probing to analyze the significance of microbial respiration and microbial CH4 oxidation for the composition of the final extracted gas mixture.


Editorial History

  • Received: 18 Jan 2022
  • Revised: 25 Mar 2022
  • Accepted: 12 May 2022
  • Available online: 30 Jun 2022


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