Denitrification and dissimilatory nitrate reduction to ammonium (DNRA) in a temperate re-connected floodplain

Dissimilatory nitrate reduction to ammonium conserves nitrogen in anthropogenically affected subtropical mangrove sediments in Southeast China

“…Table 2 lists DNRA rates and ratios of DNRA rates to the total NO 3 − reduction in different biological environments (e.g., bay, wetland, estuary, mangrove, and farmland) around the world. It is evident from the table that the ratios of DNRA to the total NO 3 − reduction could be low to zero (Sgouridis et al, 2011;Trimmer and Nicholls, 2009) as well as high enough to reduce most NO 3 − (Fernandes et al, 2012;Gilbert et al, 1997;Zhang et al, 2015). In this study, the DNRA rate is between 0.17 and 0.24 mmol N m −2 h −1 , which is considerably lower than the results of the previous studies (Table 2); however, in this study, the ratio of DNRA is relatively high (between 75.7% and 85.9%), showing that this mechanism deserves more attention and further studies are needed in both the research area and global context (Fig.…”

Subsurface nitrate reduction under wetlands takes place in narrow superficial zones

“…[22] Dissimilatory Nitrate Reduction to Ammonium (DNRA) could also be present. DNRA is a respiratory or fermentative pathway where nitrate is reduced step by step to ammonium competing with denitrification for the nitrate in groundwater [23] and in riparian zones [24], Equation 2.…”

Response of a sludge-minimizing lab-scale BNR reactor when the operation is changed to real primary effluent from synthetic wastewater

“…Another observation is that there was around 2.5 mg/L NO 3 À À N that disappeared during each anaerobic cycle. This could be explained through the occurrence of denitrification of nitrate to other reduced forms of nitrogen and/or a dissimilatory nitrate reduction to ammonium (DNRA) (Sgouridis et al, 2011).…”