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Title: Biological lignocellulose solubilization: Comparative evaluation of biocatalysts and enhancement via cotreatment

Journal Article · · Biotechnology for Biofuels
 [1];  [1];  [1];  [2];  [2];  [3];  [2];  [2];  [4];  [4];  [5];  [5];  [1]
  1. Dartmouth College, Hanover, NH (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of California, Riverside, CA (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Georgia, Athens, GA (United States)

Feedstock recalcitrance is the most important barrier impeding cost-effective production of cellulosic biofuels. Pioneer commercial cellulosic ethanol facilities employ thermochemical pretreatment and addition of fungal cellulase, reflecting the main research emphasis in the field. However, it has been suggested that it may be possible to process cellulosic biomass without thermochemical pretreatment using thermophilic, cellulolytic bacteria. Thus, to further explore this idea, we examine the ability of various biocatalysts to solubilize autoclaved but otherwise unpretreated cellulosic biomass under controlled but not industrial conditions.

Research Organization:
NREL (National Renewable Energy Laboratory (NREL), Golden, CO (United States))
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1236762
Report Number(s):
NREL/JA--5100-65764
Journal Information:
Biotechnology for Biofuels, Journal Name: Biotechnology for Biofuels Journal Issue: 1 Vol. 9; ISSN 1754-6834
Publisher:
BioMed CentralCopyright Statement
Country of Publication:
United States
Language:
English

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Degradation of microcrystalline cellulose and non-pretreated plant biomass by a cell-free extracellular cellulase/hemicellulase system from the extreme thermophilic bacterium Caldicellulosiruptor bescii journal January 2013
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journal April 2009
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Genome sequencing and analysis of the biomass-degrading fungus Trichoderma reesei (syn. Hypocrea jecorina) journal May 2008
Application of monoclonal antibodies to investigate plant cell wall deconstruction for biofuels production journal January 2011
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Enhanced saccharification of lignocellulosic agricultural biomass and increased bioethanol titre using acclimated Clostridium thermocellum DSM1313 journal April 2017
Nanomechanics of cellulose deformation reveal molecular defects that facilitate natural deconstruction journal April 2019
Transgenic switchgrass ( Panicum virgatum L.) targeted for reduced recalcitrance to bioconversion: a 2-year comparative analysis of field-grown lines modified for target gene or genetic element expression journal February 2017
Dramatic performance of Clostridium thermocellum explained by its wide range of cellulase modalities journal February 2016
Strain and bioprocess improvement of a thermophilic anaerobe for the production of ethanol from wood journal June 2016
Engineering a highly active thermophilic β-glucosidase to enhance its pH stability and saccharification performance journal July 2016
Cellulosic ethanol production via consolidated bioprocessing by a novel thermophilic anaerobic bacterium isolated from a Himalayan hot spring journal March 2017
Efficient whole-cell-catalyzing cellulose saccharification using engineered Clostridium thermocellum journal May 2017
The effect of switchgrass loadings on feedstock solubilization and biofuel production by Clostridium thermocellum journal November 2017
Metabolome analysis reveals a role for glyceraldehyde 3-phosphate dehydrogenase in the inhibition of C. thermocellum by ethanol journal November 2017
Development and characterization of stable anaerobic thermophilic methanogenic microbiomes fermenting switchgrass at decreasing residence times journal September 2018
Multiple levers for overcoming the recalcitrance of lignocellulosic biomass journal January 2019
Metabolic and evolutionary responses of Clostridium thermocellum to genetic interventions aimed at improving ethanol production journal March 2020
Utilization of Monosaccharides by Hungateiclostridium thermocellum ATCC 27405 through Adaptive Evolution journal July 2021
Lignocellulose solubilization and conversion by extremely thermophilic Caldicellulosiruptor bescii improves by maintaining metabolic activity journal May 2019
Bioethanol from Lignocellulosic Biomass book January 2017
Bioethanol from Lignocellulosic Biomass book July 2018
Thermoanaerobacter species differ in their potential to reduce organic acids to their corresponding alcohols journal July 2018
Lignocellulosic biomass: Hurdles and challenges in its valorization journal November 2019
Structural features influential to enzymatic hydrolysis of cellulose-solvent-based pretreated pinewood and elmwood for ethanol production journal November 2017
Harnessing yeast organelles for metabolic engineering journal July 2017
Lignocellulose fermentation and residual solids characterization for senescent switchgrass fermentation by Clostridium thermocellum in the presence and absence of continuous in situ ball-milling journal January 2017
Nanomechanics of cellulose deformation reveal molecular defects that facilitate natural deconstruction journal April 2019
Cellulosomes localise on the surface of membrane vesicles from the cellulolytic bacterium Clostridium thermocellum journal June 2019
Global Distribution Patterns and Pangenomic Diversity of the Candidate Phylum “Latescibacteria” (WS3) journal March 2017
Bioavailability of Carbohydrate Content in Natural and Transgenic Switchgrasses for the Extreme Thermophile Caldicellulosiruptor bescii journal June 2017
Enhanced depolymerization and utilization of raw lignocellulosic material by co-cultures of Ruminiclostridium thermocellum with hemicellulose-utilizing partners journal April 2019
Strain and bioprocess improvement of a thermophilic anaerobe for the production of ethanol from wood journal June 2016
Engineering a highly active thermophilic β-glucosidase to enhance its pH stability and saccharification performance journal July 2016
Cellulosic ethanol production via consolidated bioprocessing by a novel thermophilic anaerobic bacterium isolated from a Himalayan hot spring journal March 2017
Efficient whole-cell-catalyzing cellulose saccharification using engineered Clostridium thermocellum journal May 2017
Metabolome analysis reveals a role for glyceraldehyde 3-phosphate dehydrogenase in the inhibition of C. thermocellum by ethanol journal November 2017
Multiple levers for overcoming the recalcitrance of lignocellulosic biomass journal January 2019
Metabolic and evolutionary responses of Clostridium thermocellum to genetic interventions aimed at improving ethanol production journal March 2020