Acceleration of Aerobic Granulation in Sidestream Treatment with Exogenous Autoinducer

Aerobic granular sludge (AGS) is a special type of biofilm formed by the self-aggregation microorganisms and extracellular polymers considered promising technology for wastewater treatment. However, new strategies are still being proposed as to how improve polymeric substances (EPS) production that influences formation AGS. Recently, acceleration aerobic granulation using autoinducers such N-acyl-homoserine lactone (AHL)-mediated quorum sensing has been reported. it not yet fully understood due knowledge gaps on correlations depending AHL used. In this study, evaluate effects various AGS activated sludge, secretion substances, formation, characteristics were comprehensively investigated. Among types, tightly bound EPS (TB-EPS) loosely (LB-EPS) in reactor with C8-HSL added 18.49 74.07 mg/g VSS, respectively, which represented increases 3.15% 53.76% compared control group. Additionally, increased relative hydrophobicity biomass volume 153% 218%, respectively. As result, had positive effect content, an increase size, improvement sedimentation early stage granulation, was found be most suitable initial among types.