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Title: Development of Agave as a dedicated biomass source: production of biofuels from whole plants

Journal Article · · Biotechnology for Biofuels

Background: Agave species can grow well in semi-arid marginal agricultural lands around the world. Selected Agave species are used largely for alcoholic beverage production in Mexico. There are expanding research efforts to use the plentiful residues (bagasse) for ethanol production as the beverage manufacturing process only uses the juice from the central core of mature plants. Here we investigate the potential of over a dozen Agave species, including three from cold semi-arid regions of the United States, to produce biofuels using the whole plant. Results: Ethanol was readily produced by Saccharomyces cerevisiae from hydrolysate of ten whole Agaves with the use of a proper blend of biomass degrading enzymes that overcomes toxicity of most of the species tested. Unlike yeast fermentations, Clostridium beijerinckii produced butanol plus acetone from nine species tested. Butyric acid, a precursor of butanol, was also present due to incomplete conversion during the screening process. Since Agave contains high levels of free and poly-fructose which are readily destroyed by acidic pretreatment, a two step process was used developed to depolymerized poly-fructose while maintaining its fermentability. The hydrolysate from before and after dilute acid processing was used in C. beijerinckii acetone and butanol fermentations with selected Agave species. Conclusions: Results have shown Agave s potential to be a source of fermentable sugars beyond the existing beverage species to now include species previously unfermentable by yeast, including cold tolerant lines. This development may stimulate development of Agave as a dedicated feedstock for biofuels in semi-arid regions throughout the globe.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
Grant code:ID0EQFAE160; AC05-00OR22725
OSTI ID:
1503060
Alternate ID(s):
OSTI ID: 1185897
Journal Information:
Biotechnology for Biofuels, Journal Name: Biotechnology for Biofuels Vol. 8 Journal Issue: 1; ISSN 1754-6834
Publisher:
Springer Science + Business MediaCopyright Statement
Country of Publication:
Netherlands
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (10)

Recent developments in Agave performance as a drought‐tolerant biofuel feedstock: agronomics, characterization, and biorefining
  • Pérez‐Pimienta, José A.; López‐Ortega, Mónica G.; Sanchez, Arturo
  • Biofuels, Bioproducts and Biorefining, Vol. 11, Issue 4 https://doi.org/10.1002/bbb.1776
journal May 2017
Recalcitrance Assessment of the Agro-industrial Residues from Five Agave Species: Ionic Liquid Pretreatment, Saccharification and Structural Characterization journal May 2018
Putting the Mess in Order: Aspergillus welwitschiae (and Not A. niger) Is the Etiological Agent of Sisal Bole Rot Disease in Brazil journal June 2018
Renewable Energy from Wildflowers—Perennial Wild Plant Mixtures as a Social‐Ecologically Sustainable Biomass Supply System journal May 2020
Review and in silico analysis of fermentation, bioenergy, fiber, and biopolymer genes of biotechnological interest in Agave L. for genetic improvement and biocatalysis journal October 2018
Sugar release and growth of biofuel crops are improved by downregulation of pectin biosynthesis journal February 2018
A model of environmental limitations on production of Agave americana L. grown as a biofuel crop in semi-arid regions journal December 2018
CE-UV/VIS and CE-MS for monitoring organic impurities during the downstream processing of fermentative-produced lactic acid from second-generation renewable feedstocks journal May 2016
Conversion of lignocellulosic agave residues into liquid biofuels using an AFEX™-based biorefinery journal January 2018
Optimization of Alkaline and Dilute Acid Pretreatment of Agave Bagasse by Response Surface Methodology journal September 2015

Figures / Tables (7)