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Apr 26, 2012
Batch Leaching Test Focusing on Clod Size of Drinking Water Sludge and Applicability to Long-Term Prediction Using Column Leaching Test
Authors: Y. Watanabe [email protected], H. Komine, K. Yasuhara, and S. MurakamiAuthor Affiliations
Publication: Geo-Frontiers 2011: Advances in Geotechnical Engineering
Abstract
For environmental impact assessment, the Japanese leaching test (JLT) is frequently used in Japan. The grains in JLT are ordinarily smaller than 2.0 mm, but the grain size might be impractical. Therefore, this study investigated the influence of controlled clod size on the leaching characteristics of represented crushable waste; drinking water sludge (DWS). First, compaction tests were conducted using DWS. Second, batch and column leaching tests were performed using various clod size fractions of DWS. The Al concentration was analyzed to investigate the effect on plant growth. Consequently, 81% of DWS was crushed to less than 2.0 mm clod size by compaction, so the clod size in JLT is reasonable for environmental impact assessment of DWS utilization. Furthermore, results of batch leaching tests using clods smaller than 0.25 mm substituted for the maximum Al concentration in column leaching tests.
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© 2011 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Department of Urban and Civil Engineering, Ibaraki University, 4-12-1 Nakanarusawa-cho, Hitachi City, Ibaraki 316-8511 Japan.E-mail: [email protected]
H. Komine
Department of Urban and Civil Engineering, Ibaraki University, 4-12-1 Nakanarusawa-cho, Hitachi City, Ibaraki 316-8511 Japan
K. Yasuhara
Institute for Global Climate Change Adaptation Science, Ibaraki University, 2-1-1 Bunkyo, Mito City, Ibaraki 310-8512 Japan
S. Murakami
Department of Urban and Civil Engineering, Ibaraki University, 4-12-1 Nakanarusawa-cho, Hitachi City, Ibaraki 316-8511 Japan
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