The　current　research　regarding　anaerobic　ammonium　oxidation　(anammox)　for　the　treatment　of　landfill　leachate　mainly　focuses　on　a　temperature　range　of　30-35　degrees　C.　However,　achieving　and　maintaining　anammox　at　lower　temperatures　would　widen　its　application　for　the　treatment　of　landfill　leachate.　This　study,　attempts　to　address　this　issue　by　using　a　combined　process　involving　an　upflow　anaerobic　sludge　blanket　(UASB),　anoxic/oxic　(A/O)　reactor,　anammox　reactor　(ANAOR),　and　anaerobic　sequencing　batch　reactor　(ASBR)　to　enrich　anammox　bacteria　at　relatively　low　temperatures.　The　rapid　start-up　of　the　partial　nitrification-anammox　process　for　landfill　leachate　treatment　was　achieved　and　maintained　at　13-22　degrees　C.　The　experiment　was　divided　into　phase　1　(20-22　degrees　C)　and　phase　2　(13-15　degrees　C).　The　results　showed　that　87.1%　of　the　chemical　oxygen　demand　(COD),　97.4-97.7%　of　the　ammonium　nitrogen　(NH4+-N),　and　93.3-94.7%　of　the　total　nitrogen　(TN),　were　removed.　At　least　29.3%　and　11.4%　of　NH4-N　was　removed　through　anammox　in　phases　1　and　2,　respectively,　with　an　accumulation　NO2--N　ratio　of　86.1-88.6%.　Candidatus　Kuenenia　was　the　dominant　anammox　bacteria　in　the　anammox　process.　A　low　temperature　of　13-15　degrees　C　did　not　affect　ammonia　oxidizing　bacteria　(AOB),　and　their　relative　abundance　in　the　A/O　reactor　ranged　from　27.29%　to　33.22%.