“…This may be because P g (1-2 kPa) reduced the activity of common Environmental Science: Water Research & Technology Paper heterotrophs and the thickness of the biofilm, 38 improved the mass transfer efficiency and ensured the partial nitrification process. 10,37 In addition, it was also verified that a partial nitrification MABR can entrap ANAMMOX bacteria and realize a PN/A MABR. 9 This study has proved that the PN/A MABR can effectively remove nitrogen under a low C/N ratio, but the operating parameters were extremely stringent.…”