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Combined antioxidant-biofuel production from coffee silverskin

  • Alessandra ProcenteseEmail author
  • Francesca Raganati
  • Giuseppe Olivieri
  • Maria Elena Russo
  • Antonio Marzocchella
Bioenergy and biofuels
  • 67 Downloads

Abstract

Biorefinery concept asks for an integrated processing approach to exploit all biomass components. The self-sustainability target may be approached if molecules characterized by high added value and fermentable sugars are produced simultaneously. In the present study, sequential (i) mild hydrothermal pretreatment to produce antioxidants and (ii) NaOH pretreatment to produce a fermentable sugar solution were carried out on coffee silverskin. Twenty-minute treatment and biomass to liquid ratio 1:30 (g mL−1) were identified as optimal operating conditions to extract bioactive compounds characterized by antioxidant activity (22.2 mgGAE/gCSS; 13.9 mgTE/gCSS). Twenty-minutes and biomass to liquid ratio of 1:20 (g mL−1) were identified as optimal operating conditions to maximize sugar recovery and ABE production (solvent yield YABE/Sugars and ABE productivity of 0.21 g g−1 and 0.12 g L−1 h−1 were obtained, respectively). The study marks the highly economic potential of the process aimed to exploit the CSS as feesdstock for antioxidant and biofuel production.

Keywords

Agro-industrial waste Butanol Coffee silverskin Antioxidant Biorefinery 

Notes

Funding

This study was funded by the the European Union’s Horizon 2020 research and innovation program, grant agreement no. 654623 “Sustainable production of next generation biofuels from waste streams-Waste2Fuels”.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Istituto di Ricerche sulla Combustione – Consiglio Nazionale delle RicercheNaplesItaly
  2. 2.Dipartimento di Ingegneria Chimicadei Materiali e della Produzione Industriale–Università degli Studi di Napoli Federico IINaplesItaly
  3. 3.Bioprocess Engineering, Algae PARCWageningen UniversityWageningenThe Netherlands

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