Naslov
High voltage electric plasma discharge application in environmental preservation

Autori
Ivanov, Mia ; Vukušić Pavičić, Tomislava ; Stulić, Višnja ; Gajdoš Kljusurić, Jasenka ; Herceg Zoran

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

Skup
Natural resources green technology & sustainable development

Mjesto i datum
Zagreb, Hrvatska, 14.09.2022. - 16.09.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
HVED, OMWW, polyphenol degradation

Sažetak
High concentrations of polyphenols, in combination with other components present in olive mill wastewater, make a big environmental problem when released into nature due to high phytotoxicity and antimicrobial properties as well as genotoxicity, which limits the biodegradation of wastewater. The aim of the work was a degradation of model solutions by high voltage electrical plasma discharge (HVED). The model solution was composed of polyphenols commonly present in the highest concentrations in olive mill wastewater hydroxytyrosol, tyrosol, vanillic acid and oleuropein. Plasma treatment was operated at a frequency of 60 Hz, a voltage of 40 kV and through time 10, 20 and 30 minutes. The initial samples were adjusted to a pH value of 7 and 10. During the treatment nitrogen (N2) gas was bubbled into the liquid to improve treatment properties. Sample temperature, electrical conductivity, pH value and polyphenol reduction were monitored during the treatment and samples were also analysed by NIR spectroscopy. In all samples, polyphenol degradation is noticeable already after 10 minutes of treatment with a reduction of over 50% for hydroxytyrosol, tyrosol and vanillic acid and a reduction of over 99% for oleuropein.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

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