Lactic acid (LA) production performance with granulation in an UASBr.
As HRT decreased, the diameter and hydrophobicity of the granules increased.
LA productivity increased up to 16.7 g LA/L-fermenter/h at HRT 0.5 h.
Rod-shaped organisms with pores and internal channels at granule surface.
Next generation sequencing revealed that Lactobacillus was dominant.