Fermentative conversion of unpretreated plant biomass: A thermophilic threshold for indigenous microbial growth.

ABSTRACT: Naturally occurring, microbial contaminants were found in plant biomasses from common bioenergy crops and agricultural wastes. Unexpectedly, indigenous thermophilic microbes were abundant, raising the question of whether they impact thermophilic consolidated bioprocessing fermentations that convert biomass directly into useful bioproducts. Candidate microbial platforms for biomass conversion, Acetivibrio thermocellus (basionym Clostridium thermocellum; T_opt 60 °C) and Caldicellulosiruptor bescii (T_opt 78 °C), each degraded a wide variety of plant biomasses, but only A. thermocellus was significantly affected by the presence of indigenous microbial populations harbored by the biomass. Indigenous microbial growth was eliminated at ≥75 °C, conditions where C. bescii thri

SUBMITTER: Bing RG 

PROVIDER: S-EPMC10561188 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature