Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 6, Issue 11, Pages 15361-15373Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b03794
Keywords
Arundo donax L.; Biohydrogen; Biorefinery; Organic acids; Polyhydroxyalkanoates; Sustainability
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Funding
- BIO-REFinery Integrated Lombardy Laboratories - BIOREFILL - Regione Lombardia [42611813]
- Fondazione Cariplo [2013-1734]
- U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research [DE-AC02-05CH11231]
- Cap Holding (Peschiera Borromeo plant, Italy)
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A highly productive Arundo donax L. clone (Clone AD-20) was produced at full field to give 54.6 Mg total solids biomass Ha(-1). Biomass was chemically and enzymatically pretreated, recovering 13.9 Mg Ha(-1) of glucose and 3.6 Mg Ha(-1) of xylose, i.e., 3.5-4.5 more than yield typically obtained from corn stover or switchgrass. The subsequent fermentation of the liberated sugars to organic acids (OA) by dark fermentation generated yields of 3850 Nm(3) Ha(-1) of biohydrogen and 14.2 Mg Ha(-1) of OAs. OAs were then used as a feed to produce polyhydroxyalkanoates (PHA), with 3-hydroxybutyrate the major monomer present (PHB > 95% PHA), from a biological process using mixed microbial culture producing 5.04 Mg Ha(-1) of PHA. An initial economic analysis indicated that this multistage biorefinery approach would result in a net revenue of 10,415 (sic) Ha(-1), which is approximately 9-fold greater than that obtained by a traditional biorefinery producing bioethanol.
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