EUBCE 2023 - Mariusz WADRZYK - Hydrothermal Liquefaction of Blackcurrant Pomace - Effect of Prior Removal of Water-extractives on Yield and Quality of Resultant Bioproducts.

Hydrothermal Liquefaction of Blackcurrant Pomace - Effect of Prior Removal of Water-extractives on Yield and Quality of Resultant Bioproducts.

Short Introductive summary

Herein, we have investigated a two-stage processing route of blackcurrant pomace. The raw material was subjected to water extraction at the first stage to isolate potentially usable compounds like monosaccharides, antioxidants and/or pigments. Subsequently, the resultant residue was hydrothermally processed towards high-energy density bioproducts at temperatures ranging from 225 °C up to 325 °C. It was found that 22.20 wt.% of the starting blackcurrant pomace dry matter was transferred to the aqueous phase during extraction, where monosugars with sucrose accounted for 8.15 wt.% of dry matter of the processed pomace. It was also noted that two-stage hydrothermal liquefaction at medium (275 °C), and high temperatures (325 °C) increase the yield of the biocrude by ca. 6 wt.% and 5 wt.%, respectively with regard to direct HTL. To sum up, it is worth emphasizing that the present investigation has shown that the implementation of the proposed approach allows for the simple isolation of some perspective groups (monosugars, pigments) and enhances the yield and quality of the resultant HTL biocrude.

M. Wadrzyk, AGH University of Science and Technology Kraków, Kraków, POLAND
M. Plata, AGH University of Science and Technology Kraków, Kraków, POLAND
L. Korzeniowski, AGH University of Science and Technology Kraków, Kraków, POLAND
R. Janus, AGH University of Science and Technology Kraków, Kraków, POLAND
M. Lewandowski, AGH University of Science and Technology Kraków, Kraków, POLAND