The　anammox　(anaerobic　ammonium　oxidation)　process　has　attracted　much　attention　for　its　cost-saving.　However,　excess　nitrate　is　usually　produced　which　should　be　further　treated.　In　this　study,　an　innovative　process　combined　anammox　with　partial　denitrification　(nitrate　-＞　nitrite)　was　proposed　for　advanced　nitrogen　removal　in　two　sequencing　batch　reactors　(SBRs).　The　nitrate　produced　in　anammox-SBR　(ASBR)　was　fed　into　partial　denitrification-SBR　(DSBR),　in　which　the　nitrate　was　reduced　to　nitrite,　and　then　removed　by　backflow　of　the　nitrite　to　ASBR　for　secondary　anammox　process.　Results　showed　that　similar　to　80%　nitrate　in　the　effluent　of　previous　anammox　was　converted　to　nitrite　in　DSBR.　And　the　maximum　nitrogen　removal　efficiency　(NRE)　of　94.06%　was　obtained　with　total　nitrogen　(TN)　in　the　effluent　of　10.98　mg/L　in　average.　It　indicated　that　desired　effluent　quality　could　be　achieved,　and　the　advanced　nitrogen　removal　performance　was　attributed　to　the　successful　achievement　of　partial　denitrification.　(C)　2014　Elsevier　Ltd.　All　rights　reserved.