@inproceedings{c62b0a7ffda542adacc0bfe72d4facfa,
title = "Distinctive nitrogen oxides reduction capabilities of a Denitrifying Polyphosphate Accumulating Organisms (DPAOs) enrichment in a long-term nitrite fed sequencing batch reactor",
abstract = "Denitrifying polyphosphate accumulating organisms (DPAOs), are capable of nitrate and/or nitrite (NO2-) reduction coupled to P uptake when subjected to alternating anaerobic/anoxic conditions. However, strong accumulation of nitrous oxide (N2O) has been previously observed in DPAO enrichments under high NO2- concentrations. To date, denitrification capability and denitrifying P uptake rates of DPAOs using different electron acceptors after long-term exposure to elevated NO2- concentration hasn't been examined. To address this knowledge gap, we operated a lab-scale SBR under alternating anaerobic/anoxic conditions with high nitrite feed for >2 years. Ex-situ batch assays were performed to clarify capacity for reduction of various nitrogen oxides and P uptake of the DPAOs enrichment culture. These batch assays revealed distinct nitrogen oxides reduction and denitrifying P uptake capabilities. High-throughput 16S rRNA sequencing combined with qPCR assays revealed the selection of putative DPAOs and other potential denitrifying microbial consortia responsible for N2O accumulation under high nitrite-feeding regimes.",
keywords = "DPAOs, Denitrification, Granular biomass, Nitrite",
author = "Han Gao and Xiaotian Zhao and Lei Zhou and Wells, {George F.}",
year = "2017",
month = jan,
day = "1",
language = "English (US)",
isbn = "9781510863682",
series = "Water Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017",
publisher = "Water Environment Federation",
pages = "1755--1778",
booktitle = "Water Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017",
address = "United States",
note = "Water Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017 ; Conference date: 30-09-2017 Through 04-10-2017",
}