Changes in a glycerol-degrading bacterial community in an upflow anaerobic reactor for 1,3-propanediol production.

ABSTRACT: The evolution of the bacterial community in an up-flow anaerobic reactor with silicone support, continuously fed with pure glycerol (day 0-293) and crude glycerol (day 294-362), was studied. Biomass from a former glycerol-degrading reactor was used as inoculum. The maximum yield and productivity of 1,3-propanediol (PDO) (0.62 mol.mol-gly^-1 and 14.7 g.L^-1.d^-1, respectively) were obtained with crude glycerol. The inoculum had low diversity, with dominance of Lactobacillus (70.6%) and Klebsiella/Raoultella (23.3%). After 293 days of feeding with pure glycerol, the abundance of both taxa decreased to less than 10%, either in the attached biofilm or in the biomass growing in suspension. The genus Clostridium and members of the Ruminococcaceae family then became

SUBMITTER: Cordeiro CN 

PROVIDER: S-EPMC11787190 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature