Naslov
Biological treatment of grape pomace by Rhyzopus oryzae – scale up in a tray bioreactor

Autori
Šelo, Gordana ; Planinić, Mirela ; Tišma, Marina ; Koceva Komlenić Daliborka, Bucić-Kojić, Ana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
European Biotechnology Congress 2022

Mjesto i datum
Prag, Češka Republika, 05.10.2022. - 07.10.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
solid-state fermentation, grape pomace, R. oryzae, phenolic compounds, scale up

Sažetak
Biological treatment of grape pomace by R. oryzae was carried out in laboratory jars under solid- state fermentation conditions and the process was scaled-up in a tray bioreactor. The aim of this work was to investigate the influence of R. oryzae on the recovery of phenolic compounds from grape pomace, chemical composition and activity of lignolytic and hydrolytic enzymes. A 15-day biological treatment with R. oryzae decreased the content of total phenolic compounds, total flavonoids, and total proanthocyanidins by 47 %, 43 % and 62 % in laboratory jars and by 34 %, 21 % and 42 % in a tray bioreactor, while it had a positive effect on the extractability of 10 of the 21 phenolic compounds quantified by the UHPLC method. Their content increased by 1.1- to 2.5- fold. After 15 days of fermentation in jars and tray bioreactor, respectively, a decrease in reducing sugar concentration by 53 % and 69 % and an increase in fat content by 44 % and 30 % were also observed. Of the enzymes studied, the highest activity was measured for xylanase (62.96 U/gdb).

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA