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Phenolics Value Chain and l-Lactic Acid Bioproduction from Agricultural Biomass

  • Krista L. Morley
  • Peter C. K. LauEmail author
Chapter
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Part of the Green Chemistry and Sustainable Technology book series (GCST)

Abstract

To make the quantum leap from conceptualization of an idea to possible commercialization of a product, at first it would be desirable to have the opportunity to showcase the potential of a given product stream, successes, and the challenges involved. Using agricultural biomass as model feedstock, we feature in this chapter the tasks that were carried out in our laboratory in the context of bioproduction of vinyl phenols from two phenolic acids—vinyl guaiacol from ferulic acid and vinyl syringol from sinapic acid—as value-added chemicals. As a proof of concept, these monomers were polymerized to produce new biopolymers with improved properties. Along a similar product line, direct fermentation by a Rhizopus fungus of a nonfood feedstock to produce an optically pure l-lactic acid, a precursor to the well-known polyester, polylactic acid (PLA) was also featured. Technological advances made in these studies include the discovery and characterization of new enzymes viz. feruloyl esterases that release phenolic acids from lignocellulosic biomass. Guided by the 3-D structure of a phenolic acid decarboxylase (PAD), a novel sinapic acid decarboxylase (SAD) was evolved to effect the biotransformation of sinapic acid to vinyl syringol. Throughout the development, process optimization of various kinds was explored that include in situ recovery of water-insoluble compounds exemplified by vinyl guaiacol in a biphasic aqueous-solvent bioreactor system. We commented on some of the recent advances made in related areas and the necessity to push the green chemistry and innovation agenda forward for a sustainable future.

Keywords

Chemurgy Aromatic acids Phenolic acids Antioxidants Building blocks Biopolymers PLA Biphasic bioreactor system Biocatalysis Biorefinery Green chemistry Agricultural feedstock 

Notes

Acknowledgments

P.C.K.L. would like to thank the past members of his lab at the National Research Council Canada (NRCC) for their invaluable contributions to the work described here. Their names appeared in the cited references as well as those of numerous collaborators who provided samples or helped with analyses [42, 44, 45, 56, 57, 58, 61, 83]. Funding of various aspects of the work was provided by the Canadian Triticale Biorefinery Initiative (CTBI) of the Agricultural Bioproducts Innovation Program of Agriculture and Agri-Food Canada (AAFC), the National Bioproducts Program of NRCC-AFCC-NRCan (Natural Resource Canada), and NRC internal research programs. We also thank the Climate Change Technology and Innovation Biotechnology Program of the Canadian Biomass Innovation Network (CBIN) of NRCan for initial financial support. Current support by Tianjin “Thousand Talents” Program for Senior International Scientists to P.C.K.L. is gratefully acknowledged. The Fonds québécois de la recherche sur la nature et les technologies (FQRNT) Center for Green Chemistry and Catalysis is also acknowledged for partial support.

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Note

  1. For lack of reproducibility of results, the authors of reference 68 had made a retraction of their article in Appl Microbiol Biotechnol (2016) 100 (22):9807.Google Scholar

Copyright information

© Springer-Verlag GmbH Germany 2016

Authors and Affiliations

  1. 1.National Research Council CanadaMontrealCanada
  2. 2.Tianjin Institute of Industrial Biotechnology Chinese Academy of SciencesTianjinChina
  3. 3.McGill UniversityMontrealCanada

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