The　formation　of　granular　sludge　in　a　bench-scale　anaerobic　sequencing　batch　reactor　(ASBR)　fed　with　glucose　as　substrate　was　investigated.　The　granulation　of　sludge　was　completed　in　about　120　days,　which　was　much　shorter　than　that　reported　before.　The　granular　sludge　had　good　settling　ability　(25　m/h)　and　specific　methanogenic　activity.　The　maximum　of　metabolic　activity　for　formic　acid,　acetate,　propionate　and　butyrate　were　0.22,　0.83,　0.24　and　0.70　g　COD/(g　VSS·d),　respectively.　Scanning　electron　microscope　images　showed　that　the　compact　granules　composed　predominantly　of　the　filamentous　bacteria　like　Methanosaeta　even　under　the　condition　of　high　acetate　concentration.