Aplicação do caroço de açaí no processo de estonagem do denim

Abstract

This work proposes the use of açaí seeds as a sustainable alternative to the conventional denim stone-washing process, which employs pumice stones and requires high water consumption while generating toxic waste. The study includes a theoretical review of denim, its dyeing and finishing processes, and the properties of açaí seeds as a natural abrasive material. Using a factorial design, the effects of time, liquor ratio, and abrasive quantity were evaluated in both physical and physicoenzymatic processes. The results indicated that the physico-enzymatic process was more efficient, achieving a color difference (ΔE) of 4.15 under optimal conditions of 1.5 hours, 150 mL of water, and 750% seeds, whereas in the physical process, time was the most influential factor. Microscopic analysis confirmed dye removal without damage to the textile structure. It is concluded that açaí seeds represent a technically, economically, and environmentally viable alternative for stone-washing, contributing to more sustainable industrial practices aligned with the United Nations Sustainable Development Goals, particularly SDGs 9 (Industry, Innovation, and Infrastructure), 11 (Sustainable Cities and Communities), and 12 (Responsible Consumption and Production).