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- W2259572222 abstract "Abstract. As a relatively new technology to mitigate nitrate (NO 3 - ) losses in agricultural drainage water, denitrification bioreactors can take advantage of locally available carbon sources, otherwise considered waste, to address a water quality problem. This work compared the potential of three widespread, on-farm tree species in New Zealand to serve as woodchip denitrification bioreactor fill to treat pastoral drainage waters. A batch experiment tested woodchips made from three tree species, willow (Salix matsudana), pine (Pinus radiata) and cypress (Cupressus lusitanica), each with or without leaves/needles and either fresh or field-aged, and further column testing was done with two particle size ranges of pine and willow chips at four retention times. All species were able to remove NO 3 - in both tests with removal rates averaging 1.5-6.6 g N/day/m3 during column testing. However, willow was not recommended due to high and more sustained releases of ammonium. Woodchip carbon materials with a relatively large proportion of fines ( 3 - removal and potential for nitrogen loss. Although inclusion of green foliage materials in this short-term work did not consistently effect NO 3 - removal or ammonium losses, treatments that included needles had poor particle size uniformity. This would potentially allow greater compaction and altered hydraulic conductivity over time as well as having lower C:N than aged media, which may exacerbate nitrogen leaching concerns. Using field-aged woody media can help avoid these issues. This work illustrates the potential of denitrification bioreactors for NO 3 - reduction in pastoral drainage waters, though longer-term and larger-scale studies are needed." @default.
- W2259572222 created "2016-06-24" @default.
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- W2259572222 date "2014-07-16" @default.
- W2259572222 modified "2023-09-23" @default.
- W2259572222 title "SUITABILITY OF THREE WOOD SPECIES FOR DENITRIFICATION BIOREACTOR FILL" @default.
- W2259572222 doi "https://doi.org/10.13031/aim.20141896470" @default.
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