Simulation of Anaerobic Treatment of Vinasse Generated from the Ethanol Production Process

Vinasse is a primary byproduct of the sugarcane distillation process used in ethanol production. It is characterized by high concentrations of nitrogen, phosphorus, and sulfates, along with elevated levels of chemical oxygen demand (COD) and biochemical oxygen demand (BOD). If not managed properly, vinasse can have detrimental environmental effects, particularly on soil quality. Therefore, its treatment is essential not only to mitigate environmental risks but also to capitalize on potential energy and economic opportunities, such as bioenergy production and the generation of valuable byproducts. This study aimed to develop a virtual model using ASPEN PLUS® software for the treatment of vinasse generated in an ethanol biorefinery. The simulation achieved a theoretical organic matter removal efficiency of 100%, with biogas compositions consisting of 59 mol% methane, 32 mol% carbon dioxide, 5.5 mol% water, and 3 mol% nitrogen. Furthermore, this research contributes to the limited body of literature on vinasse treatment simulations, underscoring its potential as an eco-friendly and cost-effective waste management solution.