The　strain　JQ1004　with　capability　of　heterotrophic　nitrification　were　able　to　grow　and　metabolism　under　different　initial　ammonium　concentrations　in　range　of　0~2000mg/L.　However,　the　strain　were　completely　inhibited　in　concentration　of　2500mg/L.　When　strain　JQ1004　was　cultivated　at　30,　pH　7.5,　160rpm　with　the　initial　ammonium　of　100,　300,　500,　700,　1000,　1500,　2000mg/L,　the　maximum　specific　growth　rates　were　0.251,　0.308,　0.286,　0.243,　0.197,　0.115,　0.088h-1,　and　the　corresponding　ammonium　specific　removal　rates　reached　1.335,　1.906,　1.859,　1.759,　1.562,　1.286,　0.965g/g　(DCW•d),　respectively.　Due　to　the　inhibition　of　free　ammonia　and　high-strength　concentration　of　ammonium,　the　specific　growth　rate　and　degradation　rate　of　ammonia　increased　at　first　and　decreased　with　the　increase　of　initial　concentration　of　ammonia　nitrogen　(free　ammonia).　Three　kinetic　models　(Haldane,　Yano,　Aiba)　were　fitted　well　to　the　experimental　growth　kinetic　data　with　the　correlation　coefficients　(R2)　of　0.9944,0.9983　and　0.9929.　For　Haldane　model,　the　values　of　μmax,　Ks,　and　Ki　were　2.604h-1,　22.57mg/L,　and　1445.31mg/L,　respectively.　The　large　values　of　Ki,　far　greater　than　that　of　autotrophic　nitrifiers　or　anaerobic　ammonium-oxidizing　bacteria,　indicated　that　JQ1004　had　good　tolerance　against　high　ammonium　concentrations.　Besides,　the　specific　growth　rate　reached　a　maximum　value　of　0.583h-1　when　the　concentration　of　free　ammonia　was　5.436mg/L.These　results　indicated　possible　future　applications　of　JQ1004　in　removing　nitrogen　and　organic　carbon　from　high-strength　ammonium　wastewater.　©　2018,　Editorial　Board　of　China　Environmental　Science.　All　right　reserved.