Jinwon Lee1·Thanh Huy Phung1·Byungsun Lee2·Kangjoo Kim1*·Gyusang Lee2
1Department of Environmental Engineering, Kunsan National University
2Korea Rural Community Corporation, Rural Research Institute
이진원1·Phung Thanh Huy1·이병선2·김강주1*·이규상2
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Facilities for low impact development (LID) or groundwater recharge have the high potential spreading groundwater nitrate contamination because of the rapid infiltration. This study was initiated to remove nitrate from the waters using agricultural byproducts as organic sources for denitrification during infiltration. As the first step of this purpose, we experimentally tested the denitrifying efficiency of 4 organic materials (pine tree woodchips, cherry leaves, rice straws, and rice hulls) and tried to identify the key factors controlling the efficiency. For this study, we precisely investigated the change of chemical reactions during the experiment by analyzing various geochemical parameters. The result shows that the denitrification efficiency is not simply linked to the availability of the easily decomposable contents in the organic matter. It is found that avoiding the severe pH decrease due to the CO2 generation is the essence to derive the efficient denitrifying conditions when organic matters were used.
Keywords: denitrification, groundwater, nitrate, organic matter, agricultural byproducts, carbon dioxide
2021; 26(6): 82-94
Published on Dec 31, 2021
Department of Environmental Engineering, Kunsan National University