Denitrification bioreactors are an effective edge-of-field conservation practice for nitrate (NO3) reduction from subsurface drainage. However, these systems may produce other pollutants and greenhouse gases during NO3 removal. Here a dual-chamber woodchip bioreactor system experiencing extreme low-flow conditions was monitored for its spatiotemporal NO3 and total organic carbon dynamics in the drainage water. Near complete removal of NO3 was observed in both bioreactor chambers in the first two years of monitoring (2019–2020) and in the third year of monitoring in chamber A, with significant (p 2 mg N L−1.This is a manuscript of an article published as Hartfiel, Lindsey M., Natasha L. Hoover, Steven J. Hall, Thomas M. Isenhart, Carmen L. Gomes, and Michelle L. Soupir. "Extreme low-flow conditions in a dual-chamber denitrification bioreactor contribute to pollution swapping with low landscape-scale impact." Science of The Total Environment 877 (2023): 162837.
DOI: 10.1016/j.scitotenv.2023.162837.
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