At　4℃　and　with　no　substrate,　the　activity　recovery　of　ANAMMOX　granular　sludge　was　examined　after　230　days　of　storage,　and　the　effect　of　adding　two　organic　carbon　sources　(glucose　and　sodium　propionate)　on　the　recovery　was　explored.　After　230　days　of　long-term　storage,　the　activity　of　ANAMMOX　bacteria　was　0.013　g·(g·d)-1,　which　was　just　6.02%　of　the　baseline,　and　the　average　particle　size　was　135.05　μm,　which　was　38.23%　lower.　The　sludge　disintegration,　black　in　color.　In　the　activity　recovery　stage,　the　R2　and　R3　reactors　added　glucose　and　sodium　propionate　as　organic　carbon　sources.　The　recovery　results　showed　that　after　15　days　of　recovery,　the　PN　content　of　the　R1,　R2,　and　R3　reactors　reached　126.30,　188.86,　and　168.82　mg·g-1,　respectively,　and　the　activity　of　the　ANAMMOX　bacteria　was　improved,　reaching　0.145,　0.185,　and　0.126　g·(g·d)-1,　respectively.　The　R2　reactor　with　glucose　as　the　organic　carbon　source　had　the　highest　ANAMMOX　bacteria　activity,　which　recovered　85.65%　before　preservation,　and　the　total　nitrogen　removal　rate　reached　81.61%.　On　the　20th　day,　the　particle　sizes　of　the　ANAMMOX　granular　sludge　in　the　R1,　R2,　and　R3　reactors　were　289.81,　359.66,　and　314.37　μm,　respectively,　indicating　that　the　long-term　preservation　of　ANAMMOX　granular　sludge　is　not　an　insurmountable　problem.　Furthermore,　adding　glucose　during　the　recovery　phase　can　not　only　effectively　increase　the　EPS　content　and　promote　particle　growth　and　adhesion,　but　also　enrich　the　reaction　pathways　of　ANAMMOX,　enhancing　recovery　rates.