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An insight into the observed discrepancies in the effect of biochar on removing nitrate in the denitrifying bioreactors
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: 2018 ASABE Annual International Meeting 1800538.(doi:10.13031/aim.201800538)
Authors: Bahareh Hassanpour, Tammo S Steenhuis, Larry D Geohring
Keywords: Denitrifying bioreactors, biochar, denitrification, retention time, dissolved oxygen
Better performance of the biochar amended bioreactors in short HRTs was attributed its ability to lower the dissolved oxygen in the bioreactors more efficiently. With the elimination of dissolved oxygen from the influent, no significant difference was observed between the biochar amended bioreactors and the non-amended members. However, in long retention times, the biochar amended bioreactors performed poorly, possibly due to biochar not being bioavailable to denitrifiers. Therefore, its addition to the bioreactors decreased the share of the organic matter bacteria would otherwise obtain.
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