| Texto completo | |
| Autor(es): |
Campos, Brenda G.
;
Veloso, Ivan I. K.
;
da Silva, Maira M.
;
Badino, Alberto C.
;
Cruz, Antonio J. G.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CHEMICAL ENGINEERING AND PROCESSING; v. 210, p. 10-pg., 2025-02-16. |
| Resumo | |
This study proposes a novel approach to remove heat and maintain the broth temperature constant during fed- batch ethanol extractive fermentations by using a carbon dioxide (CO2) flow rate. The method offers an alternative to traditional cooling methods, such as water-based plate heat exchangers, which can be inefficient in distilleries located in hot regions. A mathematical model was developed and used to find the optimal CO2 flow rate to maintain constant the broth temperature in simulated fermentations at 30, 32, and 34 degrees C. The results showed that using multiple CO2 flow rates over an 8-hour stripping period could effectively reduce temperature deviations from the set-point while minimizing the total amount of CO2 used. However, finding the optimal combination of flow rates becomes computationally expensive as the stripping period is split in a greater number of time subintervals. A comprehensive study was carried out to assess the adequate number of time subintervals to keep the broth temperature constant. Experimental fermentation carried out at 34 degrees C using eight-time subintervals confirmed the accuracy of the model's predictions. A temperature deviation of less than 0.5 degrees C from the set-point highlights the potential of extractive fermentation for controlling temperature and offers insights to enhance process efficiency. (AU) | |
| Processo FAPESP: | 18/11405-5 - Fermentação Alcoólica Extrativa em Biorreatores Pneumáticos com Arraste de Etanol por CO2 Integrada a Etapas de Recuperação |
| Beneficiário: | Alberto Colli Badino Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |