Journal article
Optimization of autohydrolysis conditions to extract antioxidant phenolic compounds from spent coffee grounds
University of Minho1
Universidad Nacional de Colombia sede Manizales2
Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark3
Research Groups, Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark4
Biomass Conversion and Bioprocess Technology, Research Groups, Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark5
Autohydrolysis, which is an eco-friendly technology that employs only water as extraction solvent, was used to extract antioxidant phenolic compounds from spent coffee grounds (SCG). Experimental assays were carried out using different temperatures (160–200 °C), liquid/solid ratios (5–15 ml/g SCG) and extraction times (10–50 min) in order to determine the conditions that maximize the extraction results.
The optimum conditions to produce extracts with high content of phenolic compounds (40.36 mg GAE/g SCG) and high antioxidant activity (FRAP = 69.50 mg Fe(II)/g SCG, DPPH = 28.15 mg TE/g SCG, ABTS = 31.46 mg TE/g SCG, and TAA = 66.21 mg α-TOC/g SCG) consisted in using 15 ml water/g SCG, at 200 °C during 50 min.
Apart from being a green technology, autohydrolysis under optimized conditions was demonstrated to be an efficient method to extract antioxidant phenolic compounds from SCG.
| Language: | English |
|---|---|
| Year: | 2017 |
| Pages: | 1-8 |
| ISSN: | 02608774 and 18735770 |
| Types: | Journal article |
| DOI: | 10.1016/j.jfoodeng.2016.11.014 |
| ORCIDs: | Mussatto, Solange Ines |
