Pilot-scale simulation of landfill bioreactor and controlled dumping of fresh and partially stabilized municipal solid waste in a tropical developing country

Swati, M., Karthikeyan, O.P., Joseph, Kurian, Visvanathan, C., and Nagendran, R. (2011) Pilot-scale simulation of landfill bioreactor and controlled dumping of fresh and partially stabilized municipal solid waste in a tropical developing country. Journal of Hazardous, Toxic, and Radioactive Waste, 15 (4). pp. 321-330.

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Abstract

Four pilot-scale lysimeters were used to study the benefits of landfill operation with and without leachate recirculation in tropical weather conditions. Young and old landfills were simulated by filling lysimeters with a segregated fraction of fresh municipal solid waste (MSW) and MSW mined from an open dump site, respectively, and periodically monitoring leachate quantity and quality and biogas quality. For each substrate, one lysimeter was operated as a bioreactor with leachate recirculation and another lysimeter was operated as a controlled dump, for a period of 10 months. Densities between 652 and 825 kg/m3 could be achieved with fresh and mined MSW. Despite such compaction during waste placement, bioreactor technology helps in leachate management, especially in the case of the young landfill lysimeter operated in tropical weather. The benefits of leachate recirculation in the young landfill lysimeter were evident from the significant decrease in chemical oxygen demand (COD) (86), biochemical oxygen demand (BOD) (82), dissolved organic carbon (DOC) (85), and volatile solids (75) in leachates. However, ammonia nitrogen (amm-N) and chlorides in the leachates accumulated in bioreactor landfills. Operating an old landfill lysimeter as a bioreactor seemed to have no exceptional advantage in the context of leachate management, although leachate recirculation enhanced the methane potential of both fresh and mined MSW.

Item ID: 34696
Item Type: Article (Refereed Research - C1)
Keywords: bioreactor landfills, leachate recirculation, leachate management, tropical weather, lysimeters, municipal solid waste
ISSN: 2153-5515
Funders: Swedish International Development Cooperation Agency
Date Deposited: 10 Sep 2014 04:53
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050206 Environmental Monitoring @ 30%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050205 Environmental Management @ 30%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050207 Environmental Rehabilitation (excl Bioremediation) @ 40%
SEO Codes: 96 ENVIRONMENT > 9606 Environmental and Natural Resource Evaluation > 960604 Environmental Management Systems @ 100%
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