Microbial conversion pathways of particulate organic substrate conversion in aerobic granular sludge systems: limited anaerobic conversion and the essential role of flocs

Abstract

Particulate organic substrate (XB) represents the major fraction of organic substrate in low-strength municipal wastewater (MWW) but its hydrolysis, conversion and utilisation in aerobic granular sludge (AGS) is not well...

Full-scale aerobic granular sludge for municipal wastewater treatment – granule formation, microbial succession, and process performance

“…Floccular biomass can originate from eroded granular fragments but also from suspended growth. 52,53 Probably, the complex organic matter in the influent was not entirely hydrolysed and consumed in the anaerobic phase, but also supported the growth of heterotrophic bacteria in the floccular and granular sludge during the subsequent aerobic phase. Several genera of heterotrophic bacteria were indeed detected in the biomass samples.…”

Modelling of aerobic granular sludge reactors: the importance of hydrodynamic regimes, selective sludge removal and gradients

“…The diameter of the granules is fixed (input variable). The thickness of the four outer layers is fixed to 25 μm to increase resolution at the granule surface, while inner layers were distributed evenly depending on the chosen granule radius and the total number of layers (Layer et al 2020b(Layer et al , 2022. The thickness of the inner layers is therefore calculated with the following equation: Z inner,layer ¼ r granule À n outer,layer Á Z outer,layer n total,layer À n outer,layer…”

“…Default SBR cycle parameters, biofilm model parameters and influent WW composition are also not predicted. All details including a list of all parameters and default values of the fully-mixed AGS model can be found inLayer et al (2020bLayer et al ( , 2022.…”