Abstract

This study provides information about the carbohydrate present in tomato pomace (skins, seeds, and vascular tissues) as well as in the byproducts of the lycopene supercritical carbon dioxide extraction (SC-CO2) such as tomato serum and exhausted matrix and reports their conversion into bioethanol. The pomace, constituting approximately 4% of the tomato fruit fresh weight, and the SC-CO2-exhausted matrix were enzyme saccharified with 0.1% Driselase leading to sugar yields of ∼383 and ∼301 mg/g dw, respectively. Aliquots of the hydrolysates and of the serum (80% tomato sauce fw) were fermented by Saccharomyces cerevisiae. The bioethanol produced from each waste was usually >50% of the calculated theoretical amount, with the exception of the exhausted matrix hydolysate, where a sugar concentration >52.8 g/L inhibited the fermentation process. Furthermore, no differences in the chemical solubility of cell wall polysaccharides were evidenced between the SC-CO2-lycopene extracted and unextracted matrices. The deduced glycosyl linkage composition and the calculated amount of cell wall polysaccharides remained similar in both matrices, indicating that the SC-CO2 extraction technology does not affect their structure. Therefore, tomato wastes may well be considered as potential alternatives and low-cost feedstock for bioethanol production.

Autore Pugliese

• Piro Gabriella , Lenucci Marcello Salvatore , Montefusco Anna

Tutti gli autori

• M. S. Lenucci , M. Durante , A. Montefusco , G. Dalessandro , G. Piro

Titolo volume/Rivista

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

Anno di pubblicazione

2013

ISSN

0021-8561

ISBN

Non Disponibile

Numero di citazioni Wos

15

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

15

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile