A novel upflow anaerobic–anoxic sludge blanket reactor, AnoxAn, is presented.
Separate anoxic and anaerobic conditions were achieved inside the AnoxAn reactor.
The single reactor successfully performed denitrification and phosphate release.
Excellent nitrogen and phosphorus removal of AnoxAn coupled with an aerobic reactor.
AnoxAn promotes biomass retention and particulate organic matter hydrolysis.