• An Experimental Study on Denitrification Efficiency of Agricultural Byproducts for Prevention of Nitrate Contamination from LID or Groundwater Recharge Facilities

  • 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

  • 지하수 함양시설 또는 LID시설에서의 질산성질소 오염방지를 위한 농업부산물의 탈질효율 실험연구

  • 이진원1·Phung Thanh Huy1·이병선2·김강주1*·이규상2

  • 1군산대학교 환경공학과
    2한국농어촌공사 농어촌연구원

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

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

This Article

  • 2021; 26(6): 82-94

    Published on Dec 31, 2021

  • 10.7857/JSGE.2021.26.6.082
  • Received on Nov 28, 2021
  • Revised on Dec 6, 2021
  • Accepted on Dec 13, 2021

Correspondence to

  • Kangjoo Kim

  • Department of Environmental Engineering, Kunsan National University

  • E-mail: kangjoo@kunsan.ac.kr