Integration of chlorogenic acid recovery and bioethanol production from spent coffee grounds

Research output: Contribution to journalJournal articleResearchpeer-review

25 Downloads (Pure)

Abstract

Spent coffee grounds (SCG) are an abundant by-product of the coffee industry with a complex composition that makes them a promising feedstock for a biorefinery. The objective of this study was to evaluate SCG as a substrate for combined chlorogenic acid and bioethanol production after dilute acid hydrolysis. The effect of phenolics extraction on the downstream process was evaluated exhibiting no loss of sugars and an increase in the sugar release efficiency during the dilute acid hydrolysis. In order to suggest an economically feasible process, phenolics extraction and dilute acid hydrolysis prior to ethanol fermentation were optimised by means of experimental design. The responses of the designs were not only the efficiencies of the processes, but also a balance between product recovery and estimated costs. In both cases, decreased efficiencies obtained with low liquid-solid ratios were countervailed by increased products concentrations and higher economical performance. Under the optimised conditions, the purity of the phenolics extract (32%) could allow it to enter the market as a dietary supplement of chlorogenic acid, a product with high trade value. Moreover, a concentration of 3.9% (w/v) ethanol was reached upon fermentation of the hydrolysate of SCG after extraction and dilute acid hydrolysis.
Original languageEnglish
JournalBiochemical Engineering Journal
Volume116
Pages (from-to)54–64
Number of pages11
ISSN1369-703x
DOIs
Publication statusPublished - 2016

Keywords

  • Bioconversion
  • Chlorogenic acid
  • Ethanol
  • Fermentation
  • Process integration
  • Spent coffee grounds

Cite this

@article{f0382a247d2d493997a95ad54d039dee,
title = "Integration of chlorogenic acid recovery and bioethanol production from spent coffee grounds",
abstract = "Spent coffee grounds (SCG) are an abundant by-product of the coffee industry with a complex composition that makes them a promising feedstock for a biorefinery. The objective of this study was to evaluate SCG as a substrate for combined chlorogenic acid and bioethanol production after dilute acid hydrolysis. The effect of phenolics extraction on the downstream process was evaluated exhibiting no loss of sugars and an increase in the sugar release efficiency during the dilute acid hydrolysis. In order to suggest an economically feasible process, phenolics extraction and dilute acid hydrolysis prior to ethanol fermentation were optimised by means of experimental design. The responses of the designs were not only the efficiencies of the processes, but also a balance between product recovery and estimated costs. In both cases, decreased efficiencies obtained with low liquid-solid ratios were countervailed by increased products concentrations and higher economical performance. Under the optimised conditions, the purity of the phenolics extract (32{\%}) could allow it to enter the market as a dietary supplement of chlorogenic acid, a product with high trade value. Moreover, a concentration of 3.9{\%} (w/v) ethanol was reached upon fermentation of the hydrolysate of SCG after extraction and dilute acid hydrolysis.",
keywords = "Bioconversion, Chlorogenic acid, Ethanol, Fermentation, Process integration, Spent coffee grounds",
author = "{Burniol Figols}, Anna and Katarzyna Cenian and Skiadas, {Ioannis V.} and Gavala, {Hariklia N.}",
year = "2016",
doi = "10.1016/j.bej.2016.04.025",
language = "English",
volume = "116",
pages = "54–64",
journal = "Biochemical Engineering Journal",
issn = "1369-703X",
publisher = "Elsevier",

}

Integration of chlorogenic acid recovery and bioethanol production from spent coffee grounds. / Burniol Figols, Anna; Cenian, Katarzyna; Skiadas, Ioannis V.; Gavala, Hariklia N.

In: Biochemical Engineering Journal, Vol. 116, 2016, p. 54–64.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Integration of chlorogenic acid recovery and bioethanol production from spent coffee grounds

AU - Burniol Figols, Anna

AU - Cenian, Katarzyna

AU - Skiadas, Ioannis V.

AU - Gavala, Hariklia N.

PY - 2016

Y1 - 2016

N2 - Spent coffee grounds (SCG) are an abundant by-product of the coffee industry with a complex composition that makes them a promising feedstock for a biorefinery. The objective of this study was to evaluate SCG as a substrate for combined chlorogenic acid and bioethanol production after dilute acid hydrolysis. The effect of phenolics extraction on the downstream process was evaluated exhibiting no loss of sugars and an increase in the sugar release efficiency during the dilute acid hydrolysis. In order to suggest an economically feasible process, phenolics extraction and dilute acid hydrolysis prior to ethanol fermentation were optimised by means of experimental design. The responses of the designs were not only the efficiencies of the processes, but also a balance between product recovery and estimated costs. In both cases, decreased efficiencies obtained with low liquid-solid ratios were countervailed by increased products concentrations and higher economical performance. Under the optimised conditions, the purity of the phenolics extract (32%) could allow it to enter the market as a dietary supplement of chlorogenic acid, a product with high trade value. Moreover, a concentration of 3.9% (w/v) ethanol was reached upon fermentation of the hydrolysate of SCG after extraction and dilute acid hydrolysis.

AB - Spent coffee grounds (SCG) are an abundant by-product of the coffee industry with a complex composition that makes them a promising feedstock for a biorefinery. The objective of this study was to evaluate SCG as a substrate for combined chlorogenic acid and bioethanol production after dilute acid hydrolysis. The effect of phenolics extraction on the downstream process was evaluated exhibiting no loss of sugars and an increase in the sugar release efficiency during the dilute acid hydrolysis. In order to suggest an economically feasible process, phenolics extraction and dilute acid hydrolysis prior to ethanol fermentation were optimised by means of experimental design. The responses of the designs were not only the efficiencies of the processes, but also a balance between product recovery and estimated costs. In both cases, decreased efficiencies obtained with low liquid-solid ratios were countervailed by increased products concentrations and higher economical performance. Under the optimised conditions, the purity of the phenolics extract (32%) could allow it to enter the market as a dietary supplement of chlorogenic acid, a product with high trade value. Moreover, a concentration of 3.9% (w/v) ethanol was reached upon fermentation of the hydrolysate of SCG after extraction and dilute acid hydrolysis.

KW - Bioconversion

KW - Chlorogenic acid

KW - Ethanol

KW - Fermentation

KW - Process integration

KW - Spent coffee grounds

U2 - 10.1016/j.bej.2016.04.025

DO - 10.1016/j.bej.2016.04.025

M3 - Journal article

VL - 116

SP - 54

EP - 64

JO - Biochemical Engineering Journal

JF - Biochemical Engineering Journal

SN - 1369-703X

ER -