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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; GaiĆ£o, 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.
- Wet-blue retanning process optimization for reducing water and energy consumption, and environmental impactPublication . Filipe, T.; Alves, C.; Freitas, T.; Crispim, A.; Dias, S.The process of transforming animal skin into leather comprises a range of chemical processes and mechanical operations that can be divided in four sectors such as beamhouse, tanning, dyeing, and finishing. In the dyeing sector, the chemical process (normally called retanning or dyeing process) has four main steps: neutralization, retanning, dyeing, and fatliquoring. A very important part of research in field of tanning industry is focused on develop and adapt alternative and clean processes, contributing to the sustainability of the planet. These new processes and methods enable an improvement of the quality of the leathers obtained while achieving a reduction in the energy and water consumption, as well as pollution generated.