Biorefinery potential of sustainable municipal wastewater treatment using fast-growing willow.

Autor: Sas E; University of Montreal, Institut de recherche en biologie végétale (IRBV), 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada., Hennequin LM; Imperial College London, Department of Chemical Engineering, London SW7 2AZ, United Kingdom., Frémont A; University of Montreal, Institut de recherche en biologie végétale (IRBV), 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada., Jerbi A; University of Montreal, Institut de recherche en biologie végétale (IRBV), 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada., Legault N; University of Montreal, Institut de recherche en biologie végétale (IRBV), 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada., Lamontagne J; University of Montreal, Institut de recherche en biologie végétale (IRBV), 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada., Fagoaga N; University of Montreal, Institut de recherche en biologie végétale (IRBV), 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada; Institut de recherche en économie contemporaine (IRÉC), 10555 Avenue de Bois-de-Boulogne, Montreal, QC H4N 1L4, Canada., Sarrazin M; Collège de Maisonneuve, CÉPROCQ, 6220 Sherbrooke Est, Montreal, QC H1N 1C1, Canada., Hallett JP; Imperial College London, Department of Chemical Engineering, London SW7 2AZ, United Kingdom., Fennell PS; Imperial College London, Department of Chemical Engineering, London SW7 2AZ, United Kingdom., Barnabé S; Université du Québec à Trois-Rivières, Département de chimie, biochimie et physique, 3351 boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada., Labrecque M; University of Montreal, Institut de recherche en biologie végétale (IRBV), 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada; Montreal Botanical Garden, 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada., Brereton NJB; University of Montreal, Institut de recherche en biologie végétale (IRBV), 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada. Electronic address: nicholas.brereton@umontreal.ca., Pitre FE; University of Montreal, Institut de recherche en biologie végétale (IRBV), 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada; Montreal Botanical Garden, 4101 Sherbrooke Est, Montreal, QC H1X 2B2, Canada.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2021 Oct 20; Vol. 792, pp. 148146. Date of Electronic Publication: 2021 Jun 01.
DOI: 10.1016/j.scitotenv.2021.148146
Abstrakt: The use of willow plantations can be a sustainable approach for treating primary municipal wastewater, potentially reducing both the environmental and economic burdens associated with conventional treatment. However, the impact of wastewater irrigation upon the willow biorefinery potential has not yet been established. To investigate this effect, three-year-old field grown willows were harvested from plots kept as either controls or irrigated with primary municipal wastewater effluent at 29.5 million L ha -1 yr -1 . Biomass compositional analysis, ionic liquid pretreatment and enzymatic saccharification were assessed and differential abundance of persistent extractable phytochemicals was evaluated using untargeted metabolite profiling. Glucan significantly increased by 8% in wastewater treated trees, arabinose and galactose were significantly decreased by 8 and 29%, respectively, while xylose, mannose and lignin content were unaltered. Ionic liquid pretreatment and enzymatic saccharification efficiencies did not vary significantly, releasing >95% of the cell wall glucose and recovering 35% of the lignin. From a total of 213 phytochemical features, 83 were significantly depleted and 14 were significantly enriched due to wastewater irrigation, including flavonoids and lignan derivatives. Considered alongside increased biomass yield from wastewater irrigation (+200%), lignocellulosic bioenergy yields increased to 8.87 t glucose ha -1 yr -1 and 1.89 t ha -1 yr -1 recovered lignin, while net extractives yields increased to 1.48 t ha -1 yr -1 , including phytochemicals of interest. The maintenance of glucose accessibility after low-cost ionic liquid pretreatment is promising evidence that sustainable lignocellulose bioenergy production can complement wastewater treatment. Untargeted metabolite assessment revealed some of the phytochemical toolkit employed by wastewater irrigated willows, including accumulation of flooding and salinity tolerance associated flavonoids glabraoside A and glabrene. The extractable phytochemicals underpin a novel high biomass phenotype in willow and, alongside lignocellulosic yields, could help enhance the economic feasibility of this clean wastewater treatment biotechnology through integration with sustainable biorefinery.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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