Effect of In-situ Aeration on Leachate Qualities under Uncompacted Municipal Solid Waste Disposal Conditions

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Published: Aug 30, 2024
Keywords:
Landfill aeration Leachate generation Leachate quality Waste stabilization

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Chattrapha Suethep
Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
Noppharit Sutthasil
Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand ; School of Health Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Chart Chiemchaisri
Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
Wilai Chiemchaisri
Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
Kazuto Endo
National Institute for Environmental Studies, Ibaraki 305-8506, Japan
Masato Yamada
National Institute for Environmental Studies, Ibaraki 305-8506, Japan

Abstract

This research was carried out to investigate the effect of in-situ aeration on leachate qualities in simulated lysimeters containing uncompacted municipal solid wastes representing typical municipal solid waste disposal conditions in Thailand. The study was performed by applying different aeration conditions to the lysimeters and leachate volume and its chemical characteristics were monitored over 6 months. The air supply conditions varied from natural ventilation to active aeration at rates of 0.18 and 0.36 l/min. The generated leachate was compared to the control lysimeter representing typical anaerobic disposal conditions. The lysimeters operated at a high airflow rate of 0.36 l/min and natural ventilation had their leachate qualities in terms of organic (BOD, COD) and nitrogen (TKN) well stabilized by more than 90% within 30 days. Under low aerated conditions (0.18 l/min), organic stabilization in leachate required more than 100 days whereas TKN removals were also highly fluctuated. Based on the results from this study, waste disposal operation under natural aeration through a ventilation pipe installed into the uncompacted waste layer would be sufficient to reduce organic and nitrogen pollutants in leachate to the same level as the highly aerobic landfill condition.

Article Details

Issue
Vol. 38 No. 2 (2024): May-August
Section
Research Articles

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