The　application　of　nitritation　in　domestic　wastewater　treatment　is　very　meaningful.　In　this　study,　nitritation　for　low-strength　wastewater　in　a　moving　bed　biofilm　reactor　was　achieved　at　different　temperatures　(25　degrees　C,　20　degrees　C,　15　degrees　C　and　10　degrees　C)　under　high　dissolved　oxygen.　Partial　nitritation　was　achieved　with　aerobic　flow-separated　ball　filling　cubic　sponges　through　sequencing　batch　feed　mode　even　at　temperature　of　10　degrees　C.　Results　indicated　that　the　negative　effects　of　the　decrease　in　temperature　on　nitritation　can　be　compensated　by　positive　operation　conditions,　such　as　reducing　hydraulic　residence　time　to　improve　effluent　concentration　of　ammonia.　The　contribution　of　aerobic　flow-separated　ball　to　nitritation　recovery　is　due　to　the　enhanced　internal　oxygen　inhibition　on　nitrite　oxidizing　bacteria　(NOB)　without　negatively　affecting　reaction　efficiency.　Improving　effluent　concentration　of　ammonia　under　continuous　mode　is　also　beneficial　for　internal　oxygen　repression　on　NOB　meanwhile　free　ammonia　inhibition　on　NOB　is　strengthened.　Hysteretic　growth　of　NOB　compared　to　ammonia-oxidizing　bacteria　(AOB)　in　each　cycle　should　be　the　main　reason　for　the　superiority　of　sequencing　batch　feed　mode　to　recover　nitritation.　The　finding　that　nitritation　fails　more　slowly　at　lower　temperature　is　good　for　maintaining　stable　nitritation　at　low　temperature　because　we　can　find　the　nitrification　deterioration　in　time.