Start-Up of Upflow Sludge Bleoket Reactor and Sludge Granulation under Two-Phase Anaerobic Digestion
两相厌氧条件下升流式污泥床的起动和污泥颗粒化

Start-up of sludge blanket reactor and granulation of sludge are investigated, with highly active and poorly set-tleable sludge as seed and glucose as substrate, under two-phase mcsophlic anaerobic digestion (the acid phase is an upflow reactor of 4.71 without three phase separator within it and methane phase is a typical tower-shaped UASB reactor of 12.31). Requirements for the cultivation of granules are presented. And physicochemical properties of the cultivated granules are analysed systematically. It is shown that the granules are well settleable and highly methanogenic, with settling velocity of 97.1% of granules >2mm/s and methanogenic activity of 811.2 ml CH4 STP/gVSS.d and 2.73g COD/gVSS.d. The reactor can retain large amounts of granules with its concentration of 56g VSS/I., resulting in a high treatability, up to 80kg COD/m3.d with soluble COD removal of 75-80%.