2012•Journal of Heilongjiang Institute of Science and TechnologyRequires access
Effect of sludge loading on operation stability of aerobic granular sludge
Zhang Yue
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Abstract
Aimed at the realization of the industrial application of aerobic granular sludge,this paper describes the cultivation of aerobic granular sludge in sequencing batch airlift reactor(SBAR),using conventional flocculent activated sludge as seeding sludge in synthetic domestic wastewater and presents a study of effect of sludge loading on the stability of aerobic granular sludge after the maturity of aerobic granular sludge.Aerobic granular sludge exhibits better settling properties and degradation effects in the presence of sludge loading of 1.0 kg/(kg·d) in SBAR than in the presence of sludge loading of 0.6 and 1.4 kg/(kg·d),with the consequent SVI of 28.04 mL/g,and removal efficiency of COD,NH3-N of 91.37%、86.04% respectively.With the reactor operation of 77 d,the particles greater than 0.6 mm still accounts for 6.13%.