Active　sludge　was　from　a　pilot-scale　synthetic　ammonia　industrial　wastewater　treatment　plant　with　a　strengthen　anoxic-oxic　(A/O)　technology.　The　zero　order　kinetic　model　was　suit　for　describing　shortcut　and　complete　denitrification　process.　Experimental　results　showed　that　shortcut　denitrification　could　reduce　14.1%　carbon　source　consumption　and　55.7%　denitrification　time,　respectively,　comparing　with　complete　denitrification.　The　maximum　specific　denitrification　rate　was　0.509　g·(g·d)-1　with　an　initial　NO2--N　concentration　of　36.82　mg·L-1　and　pH　7.5.　In　the　industrial　practice,　it　must　be　avoided　pH　higher　than　9.0　in　anoxic　zone　for　industrial　treatment.　Replication-selective　denitrifying　bacteria　showed　a　strong　adaptability　to　methanol　and　ethanol,　but　showed　maladaptation　to　other　small　molecular　and　easily　biodegradable　organics,　such　as　glucose　and　acetic　acid.