Sugarcane bagasse performance in copper adsorption of pot still cachaça

Abstract

Pot still cachaça, which is a typical drink from Brazil, has been highlighted in the economy of Minas Gerais State, reaching the international spirit market. Cachaça is produced through sugarcane broth fermentation and is distilled in copper stills, which may sometimes cause metal contamination due to copper toxicity in high levels. Various adsorbents have already been used to reduce copper concentration, but these absorbents remove other important compounds besides copper, interfering in the sensory quality of the beverage. In search for new adsorbents, sugarcane bagasse was used with amount, size and pretreatment variations. The main result was that sugarcane bagasse, in the particle size range of 36-65 mesh, with 10 g L-1 concentration and 3 hours of contact with cachaça was efficient to remove 68% copper. Thus, sugarcane bagasse can be considered promising to reduce copper concentration during pot still cachaça production.