publication . Article . 2020

Improving the recovery of phenolic compounds from spent coffee grounds by using hydrothermal delignification coupled with ultrasound assisted extraction

Pablo J. Arauzo; Michela Lucian; Lin. Du; Maciej P. Olszewski; Luca Fiori; Andrea Kruse;
Open Access
  • Published: 14 Jun 2020 Journal: Biomass and Bioenergy, volume 139, page 105,616 (issn: 0961-9534, Copyright policy)
  • Publisher: Elsevier BV
This study focuses on the maximization of the phenolic compounds of spent coffee grounds, by coupling hydrothermal delignification with ultrasonic assisted extraction. Temperatures of 200°C, 230 °C and 260 °C were applied for hydrothermal treatment for 1h and 3h. Produced hydrochars contain high values of fuel ratio (0.35 - 0.69) compared to raw feedstock (0.20). The increment of the reaction severity decreases the energy yield from 95.23 % to 82.99 %. After the hydrothermal treatment, the total phenolic content (TPC of the process water), determined relatively to a gallic acid standard (GAE), was found to be in a similar range for all process conditions (9.52 –...
Persistent Identifiers
free text keywords: Agronomy and Crop Science, Renewable Energy, Sustainability and the Environment, Waste Management and Disposal, Forestry, Hydrothermal delignification, spent coffee grounds, phenolic content, ultrasonic assisted extraction, Chemistry, Methanol, chemistry.chemical_compound, Phenols, Solvent, Bioenergy, Slurry, Hydrothermal circulation, Lignin, Nuclear chemistry, Biofuel
Related Organizations
Funded by
EC| MC2020
"Marie Curie Actions in Horizon 2020: regional and international impact"
  • Funder: European Commission (EC)
  • Project Code: 319454
  • Funding stream: FP7 | SP3 | PEOPLE
EC| GreenCarbon
Advanced Carbon Materials from Biowaste: Sustainable Pathways to Drive Innovative Green Technologies
  • Funder: European Commission (EC)
  • Project Code: 721991
  • Funding stream: H2020 | MSCA-ITN-ETN
Validated by funder
Agricultural and Food Sciences
Rural Digital Europe
Energy Research
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