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- Wet-white shavings as a potential source for leather retanning bioagentsPublication . Freitas, Teresa; Marujo, I.; Ribeiro, D.; Crispim, Alfredo; Neto, Maria Paula; Gaião, J.; Oliveira, J.The tanning industry generates a high quantity of solid wastes, so there is a need to create ways to value these wastes with aim to reduce environmental impact. A lot of research work has been done recently and some authors have shown the potential for obtaining protein hydrolysates from solid wastes and its application. The present work had a main objective the wet-white shavings valorization by production of hydrolysed protein and biopolymrs for leather retanning.