Anaerobic　ammonium　oxidizing　bacteria　were　stored　under　NH4+-N　and　NO2--N　conditions　(addition　ratio　1:1)　at　a　substrate　concentration　of　0,　60,　and　120　mg•L-1at　15±1　for　15　days.　The　effect　of　different　substrate　concentrations　on　the　short-term　storage　and　recovery　of　anaerobic　ammonia　oxidation　sludge　was　investigated.　After　a　short　period　of　storage,　a　recovery　experiment　was　performed.　The　results　show　that　the　anaerobic　ammonia　oxidation　activities　in　the　reactors　1,　2,　and　3　decrease　by　41.8%,　17.4%,　and　33.4%,　respectively.　Because　of　the　excessive　endogenous　respiration　and　high　substrate　concentration,　the　activities　of　the　bacteria　in　reactors　1　and　3　were　inhibited,　respectively.　Therefore,　the　activities　decreased　greatly.　Because　the　substrate　concentration　was　relatively　suitable　in　reactor　No.　2,　excessive　endogenous　respiration　and　high　substrate　concentration　inhibition　were　avoided　such　that　the　activity　of　the　bacteria　species　was　maintained　at　the　substrate　concentration.　Endogenous　respiration　occurred　during　the　storage　period.　Subsequently,　the　organic　matter　in　the　three　reactors　was　consumed.　As　a　result,　the　EPS　content　decreased　by　50.9%,　41.7%,　and　23.7%　and　the　particle　size　decreased　by　31.6%,　16.7%,　and　8.2%,　respectively.　This　shows　that　endogenous　respiration　is　maintained　by　the　bacteria　in　the　matrix-deficient　period　and　the　higher　concentration　of　the　substrate　can　to　some　extent　delay　the　endogenous　respiration.　During　the　recovery　period,　the　three　reactors　recover　the　denitrification　performances　after　15,　10,　and　7　d　respectively.　This　shows　that　the　denitrification　performance　of　the　system　has　a　faster　recovery　through　enhanced　strain　activities　compared　with　the　proliferation　of　the　strain.　©　2018,　Science　Press.　All　right　reserved.