Fig. 1: The nitrogen conversion performance under the effect of SMFs.
From: Using static magnetic field to recover ammonia efficiently by DNRA process
The concentrations of nitrate, nitrite, and ammonium in (a) RCK, b R1, and c R2 reactors in long-term operation were monitored. d Average ammonium conversion efficiency in three reactors. e Potential DNRA rates on day 80. Within the box, horizontal line denotes median value; box extend from the 25th to the 75th percentile of the group’s distribution of values; vertical extending lines denote the most extreme values within 1.5 interquartile range of the 25th and 75th percentile of the group; dots denote observations. The significance of differences obtained by Kruskal–Wallis nonparametric test was indicated by asterisks: p < 0.05 (*), p < 0.01 (**), p < 0.001 (***).
