期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 61, 期 15, 页码 3683-3692出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf4005059
关键词
agri-food industry wastes; alcoholic fermentation; cell wall polysaccharides; Solanum lycopersicurn L.; supercritical fluids; tomato pomace
资金
- MIUR [MIUR 7885/55 PAR2001]
- Department of Energy [DE-FG09-93ER-20097]
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 similar to 383 and similar to 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.
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