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Plant biomass fermentation by the extreme thermophile Caldicellulosiruptor bescii for co-production of green hydrogen and acetone: Technoeconomic analysis

Journal Article · · Bioresource Technology
 [1];  [2];  [2];  [2];  [3];  [2]
  1. North Carolina State University, Raleigh, NC (United States); OSTI
  2. North Carolina State University, Raleigh, NC (United States)
  3. University of Georgia, Athens, GA (United States)
A variety of chemical and biological processes have been proposed for conversion of sustainable low-cost feedstocks into industrial products. Here, a biorefinery concept is formulated, modeled, and analyzed in which a naturally (hemi)cellulolytic and extremely thermophilic bacterium, Caldicellulosiruptor bescii, is metabolically engineered to convert the carbohydrate content of lignocellulosic biomasses (i.e., soybean hulls, transgenic poplar) into green hydrogen and acetone. Experimental validation of C. bescii fermentative performance demonstrated 82% carbohydrate solubilization of soybean hulls and 55% for transgenic poplar. A detailed technical design, including equipment specifications, provides the basis for an economic analysis that establishes metabolic engineering targets. This robust industrial process leveraging metabolically engineered C. bescii yields 206 kg acetone and 25 kg H2 per metric ton of soybean hull, or 174 kg acetone and 21 kg H2 per metric ton transgenic poplar. Beyond this specific case, the model demonstrates industrial feasibility and economic advantages of thermophilic fermentation.
Research Organization:
University of Georgia, Athens, GA (United States)
Sponsoring Organization:
National Institutes of Health (NIH); National Science Foundation (NSF); US Department of Agriculture (USDA); US DoEd GAANN Fellowship; USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0019391; SC0022192
OSTI ID:
1976891
Journal Information:
Bioresource Technology, Journal Name: Bioresource Technology Journal Issue: C Vol. 348; ISSN 0960-8524
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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