Influence of oxygen flow rate on reaction rate of organic matter in leachate from aerated waste layer containing mainly incineration ash |
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| Authors: | Hiroshi Asakura Kazuto Endo Masato Yamada Yuzo Inoue Yusaku Ono Yoshiro Ono |
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| Institution: | 1. School of Earth and Environmental Sciences (SEES), Queens College, CUNY, 6530 Kissena Blvd, Flushing, NY 11367-1507, USA;2. Institute of Marine Sciences (IMS), University of California, Santa Cruz (UCSC), 1156 High Street, Santa Cruz, CA 95064, USA;3. Dipartimento di Scienze della Terra, Universita'' degli Studi di Firenze, Via G. La Pira 4, 50121 Firenze, Italy;4. CNR-Institute of Geosciences and Earth Resources (Section of Florence) Via G. La Pira 4, 50121 Florence, Italy;5. GEOTOP, Université du Québec à Montréal, CP 8888, Montréal, Québec H3C 3P8, Canada;1. Instituto Geológico y Minero de España (IGME), Calle Ríos Rosas, 23, 28003, Madrid, Spain;2. Instituto Geológico y Minero de España (IGME), Calle Calera, 1, 28760 Tres Cantos, Madrid, Spain;3. Centro Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Av. Complutense, 40, 28040, Madrid, Spain;1. Universidade de Lisboa, Centro de Geologia_CeGUL, Campo Grande, 1749-016 Lisboa, Portugal;2. Universidade de Lisboa, Faculdade de Ciências, Departamento de Geologia, Campo Grande, 1749-016 Lisboa, Portugal;3. East Carolina University, Department of Geological Sciences, Greenville, NC 27858-4353, USA |
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| Abstract: | It is known that aeration reduces rapidly the concentration of organic matter in leachate. However, the oxygen flow rate required to attain a certain reaction rate of organic matter should be carefully estimated. In this study, using the oxygen ratio (the ratio of oxygen flow rate by aeration to oxygen consumption rate of waste layer) as a parameter, the reaction rate of organic matter in leachate from landfilled incineration ash and incombustible waste upon aeration was evaluated. Total organic carbon (TOC) in the leachate was reduced rapidly when the oxygen ratio was high. The decomposition rate exceeded the elution rate of TOC in the leachate from the waste layer for several days when the oxygen ratio was above 102. The results indicate that the oxygen ratio can be used as a parameter for the aeration operation in actual landfill sites, to rapidly stabilize organic matter in leachate. |
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