Extração de ácido fítico do farelo de arroz desengordurado por ultrassom auxiliado pelo processo de adsorção
Defatted rice bran (FAD) is a by-product of the rice industry. Among the main compounds present in FAD, there is the presence of phytic acid (FA), a highly chelating compound with antioxidant potential due to its ability to bind iron. The extraction of FA takes place in acidic medium followed by agi...
| Autor principal: | Campagnaro, Taís |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2023
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/30751 |
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| Resumo: |
Defatted rice bran (FAD) is a by-product of the rice industry. Among the main compounds present in FAD, there is the presence of phytic acid (FA), a highly chelating compound with antioxidant potential due to its ability to bind iron. The extraction of FA takes place in acidic medium followed by agitation. This work investigated the ultrasound-assisted extraction of FA from FAD, using a rotational composite central planning (DCCR), with the independent variables being the time and HCl concentration and the response variable the extraction yield, to determine the best conditions. of extraction. Then, the extraction of FA from FAD in a countercurrent system was studied, aiming at a yield of 97%, but with a reduction in the use of solvent (HCl solution) and an increase in the concentration of FA in the extract produced. As an alternative process to countercurrent extraction, extraction combined with adsorption process on A-111 ion exchange resin (Purolite®) was used. It was found that the extraction yield of AF increases quadratically with time and HCl concentration, defining an HCl concentration of 1.0 mol L-1 and a time of 3.5 minutes to obtain the maximum yield. In the study of countercurrent extraction, it was determined to be necessary 4 stages of extraction with a ratio of solvent (HCl solution) in FAD of 6.67 to obtain a yield of 97%, having obtained a concentration of FA in the extract produced of 23 .8 g L-1. The extraction of FA from FAD followed by adsorption on A-111 (Purolite®) with the recirculation of the HCl solution (process repeated 3 times), obtained a yield similar to that of the countercurrent extraction, but the process was of greater simplicity of execution. Finally, FA desorption was carried out from A-111 resin with 1.0 mol L-1 NaCl solution, obtaining an FA extract in saline solution that has the potential to be an excellent inhibitor of microorganism growth. |
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