Heat Generation in Municipal Solid Waste Landfills
- 1 November 2005
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Geotechnical and Geoenvironmental Engineering
- Vol. 131 (11), 1330-1344
- https://doi.org/10.1061/(asce)1090-0241(2005)131:11(1330)
Abstract
This study was conducted to investigate thermal aspects of municipal solid waste landfills as a function of operational conditions and climatic region. Spatial and temporal distributions of waste temperatures were determined at four landfills located in North America (Michigan, New Mexico, Alaska, and British Columbia). Temperatures of wastes at shallow depths (extending to 6 to 8 m depth) and near the edges of a cell (within approximately 20 m) conformed to seasonal temperature variations, whereas steady elevated temperatures (23 to 57°C) with respect to air and ground temperatures were reached at depth and at central locations. Waste temperatures decreased from the elevated levels near the base of landfills, yet remained higher than ground temperatures. Thermal gradients in the range of approximately to with average absolute values typically less than were measured within the wastes. Heat content (HC) of wastes was determined as the difference between measured waste mass temperatures and unheated baseline waste temperatures at equivalent depths. Peak HC values ranged from 12.5 to . The peak HCs were directly correlated with waste placement rates and initial waste temperatures, and they occurred at a specific average precipitation beyond which further precipitation did not contribute to heat generation. HC was determined to conform to exponential growth and decay curve relationships as a function of climatic and operational conditions. Heat generation was determined based on HC using 1D heat transfer analysis. The heat generation values ranged from 23 to without losses and were significantly higher than biochemical prediction models, yet lower than values from incineration analyses. Overall, the highest values for temperatures, gradients, HC, and heat generation were observed in Michigan, followed by British Columbia, Alaska, and New Mexico. Integrated analysis of temperature and gas composition data indicated that temperature increases and HC values were greater during anaerobic decomposition than aerobic decomposition. Sustained high temperatures and heat generation occurred in wastes under anaerobic conditions.
Keywords
This publication has 9 references indexed in Scilit:
- Thermal Properties of High Water Content MaterialsPublished by ASTM International ,2008
- The role of aerobic activity on refuse temperature rise, I. Landfill experimental studyWaste Management & Research: The Journal for a Sustainable Circular Economy, 2000
- NUMERICAL MODELLING OF GENERATION AND TRANSPORT OF GAS AND HEAT IN LANDFILLS I. MODEL FORMULATIONWaste Management & Research: The Journal for a Sustainable Circular Economy, 1996
- Digesting the Organic Fraction of Municipal Solid Waste: Moving From Mesophilic (37°C) To Thermophilic (55°C) ConditionsWaste Management & Research: The Journal for a Sustainable Circular Economy, 1993
- Anaerobic Degradation of Municipal Wastes in LandfillWater Science & Technology, 1992
- Laboratory simulation of municipal solid waste fermentation with leachate recycleJournal of Chemical Technology & Biotechnology, 1986
- Optimisation of methane production and refuse decomposition in landfills by temperature controlJournal of Chemical Technology and Biotechnology, 1980
- The fate of carbon compounds in the landfill disposal of organic matterJournal of Chemical Technology and Biotechnology, 1980
- Gas production during refuse decompositionWater, Air, & Soil Pollution, 1973