Tipo di tesi
Tesi di laurea magistrale
Titolo
Pulsed electric field (PEF) and Ultrasound (US) assisted extraction of bioactive compounds from brewers' spent grain (BSG)
Dipartimento
SCIENZE AGRARIE, ALIMENTARI E AGRO-AMBIENTALI
Corso di studi
BIOSICUREZZA E QUALITÀ DEGLI ALIMENTI
Parole chiave
- extraction
- food waste recovery
- green economy
- phenolic compounds
Data inizio appello
18/05/2026
Consultabilità
Non consultabile
Data di rilascio
18/05/2029
Riassunto (Inglese)
This research stems from the growing commitment to a circular economy, aiming to upcycle brewer’s spent grain (BSG), a product that would otherwise be food waste, thereby promoting environmental sustainability.
The objective of this thesis was to analyze the effect of two emerging technologies, pulsed electric fields (PEF) and ultrasound (US), on the extraction and characterization of phenolic compounds from BSG. Both treatments are characterized by low energy consumption, rapid processing times, and a non-thermal impact. Furthermore, the extraction was conducted using water as the solvent to avoid additional production steps, environmental issues and ensure the entire process remained food-safe.
TPC and TFC were significantly higher following the US procedure as compared to the control (water extraction only by stirring) while the PEF treatment did not provide any increase in the content of these compounds. In line whit these results, both DPPH and ABTS assays showed a significant increase in the antioxidant capacity of the BSG following US treatment.
These findings are particularly relevant from a technological advancement perspective, in a world increasingly focused on maintaining or enhancing the nutritional properties of food and minimizing food waste, in line with green policies and sustainable economies.
