Xylitol Development Study of a Liquid Sweetener derived from Hemicellulose of Tomato Agricultural Wastes

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Filipa Carvalho
Francisca Duarte
Laura Pedreiras
Vanessa Posada
Margarida S. C. A. Brito

Abstract

The main purpose of this project was the eco-valorisation of the tomato plant residues. The chemical product design method was used to select the best idea based on 4 steps: needs, ideas, selection, and manufacturing.
Liquid xylitol is here proposed for the valorisation of tomato plant residues, which is an alternative sweetener with a lower glycemic index that can be produced from the hemicellulose found in leaves and stems. Its production would require an alkaline extraction with sodium hydroxide, enzymatic hydrolyses using endo-1,4-β-xylanase, and yeast fermentation with Candida tropicalis.
Liquid sweetener with 72% xylitol and other components (D-glucose, D-mannose, D-galactose, L-arabinose, and lignin), commercialised as NITS - Natural Incredible Tomato Sweetener, could be sold for 2.25 €·L-1 for companies and the same price per bottle of 500 mL for individual consumption.

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Author Biographies

Filipa Carvalho, Faculty of Engineering, University of Porto

Department of Chemical Engineering

Faculty of Engineering

University of Porto

Rua Dr. Roberto Frias

4200-465 PORTO

Portugal

Francisca Duarte, Faculty of Engineering, University of Porto

Department of Chemical Engineering

Faculty of Engineering

University of Porto

Rua Dr. Roberto Frias

4200-465 PORTO

Portugal

Laura Pedreiras, Faculty of Engineering, University of Porto

Department of Chemical Engineering

Faculty of Engineering

University of Porto

Rua Dr. Roberto Frias

4200-465 PORTO

Portugal

Vanessa Posada, Faculty of Engineering, University of Porto

Department of Chemical Engineering

Faculty of Engineering

University of Porto

Rua Dr. Roberto Frias

4200-465 PORTO

Portugal

Margarida S. C. A. Brito, LEPABE; ALiCE; Faculty of Engineering, University of Porto

LEPABE - Laboratory for Process, Environment, Biotechnology and Energy

Department of Chemical Engineering

Faculty of Engineering

University of Porto

Rua Dr. Roberto Frias

4200-465 PORTO

Portugal

 

ALiCE - Associate Laboratory in Chemical Engineering

Faculty of Engineering

University of Porto

Rua Dr. Roberto Frias

4200-465 PORTO

Portugal