Process of aerobic granules formation: state of the art. The aerobic granular activated sludge process is a promising technology for compact wastewater treatment plants. This system is superior to conventional activated sludge processes, in termsof high biomass retention, high conversion capacity, less biomass production, excellent settleabilty and resistance to inhibitory and toxic compounds. Aerobic granules were successfully cultivated in a sequencing batch reactor (SBR). These systems fulfi l most of the requirements for their formation as: substrate composition, feast-famine regime, hydrodynamic shear force, short settling time, high extracellular polymeric substances (EPS) content, inclusion of divalent cations. In this review the current knowledge of aerobic granules formation is present.
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