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Biorefinery concept for discarded potatoes: Recovery of starch and bioactive compounds
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Orientador(es)
Resumo(s)
The integral valorisation of discarding potatoes from three local varieties using processes of low environmental
impact to recover the starch contained in the flesh as well as the bioactive compounds present in the skin or in
the processing wastewaters was studied. The remaining flesh after starch extraction was also recovered to further
processing. The extraction of starch and active extracts using environmentally friendly technologies, the physicochemical
and phytochemical characterisation of the extracts, the formulation and mechanical characterisation
of the corresponding functional hydrogels, have allowed proposing potential food and non-food applications.
Results indicated that subcritical water extraction (220 ºC) was an efficient technology to recover antioxidants
from the potato skin. Processing wastewaters exhibited high protein content. The extracted starch featured
comparable physicochemical properties to that available commercially and the corresponding hydrogels
exhibited enhanced mechanical properties with absence of syneresis. It should be remarked that Agria and Neiker
varieties provided the highest total starch and bioactive content in terms of phenolics, TEAC value and DPPH
inhibition percentage, respectively
Descrição
Palavras-chave
autohydrolysis bioactives foodstuff hydrogels skin flesh starch wastes
Contexto Educativo
Citação
Journal of Food Engineering 275 (2020) 109886
Editora
Elsevier