Detoxification of chestnut burrs hydrolyzates to produce biomolecules
| Autor: | Alicia Paz, Iván Costa-Trigo, José Manuel Domínguez, David Outeiriño, Patricia Otero-Penedo, Ricardo Pinheiro de Souza Oliveira |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0303 health sciences Langmuir Environmental Engineering technology industry and agriculture Biomedical Engineering CARVÃO ATIVADO food and beverages Bioengineering Sorption 01 natural sciences Lactic acid Chemical kinetics 03 medical and health sciences chemistry.chemical_compound Adsorption Activated charcoal chemistry 010608 biotechnology Acid hydrolysis Freundlich equation 030304 developmental biology Biotechnology Nuclear chemistry |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1369-703X |
| Popis: | Activated charcoal was proposed to detoxify the streams rich in carbohydrates generated after the acid hydrolysis of chestnut (Castanea sativa) burrs. Adsorption isotherms, kinetics and thermodynamics parameters were evaluated under different ratios of adsorbent/adsorbate (0.25–5.0% w/v). Results showed that Langmuir equations fitted better the equilibrium sorption than the Freundlich isotherm, while pseudo-second-order reaction kinetics explained the reaction mechanism most effectively. An exothermic and non-spontaneous adsorption process was defined by negative enthalpies and positive free energies; meanwhile negative entropies showed the affinity of phenolic compounds for the adsorbent. Mid temperatures (30 °C) and higher amounts of charcoal (5.0 % (w/v)) stimulated the adsorption process, with a higher percentage of phenolic compounds removal (95.50 ± 0.03%). Lactobacillus plantarum CECT-221 was unable to consume raw hydrolyzates; however, it was capable to produce bacteriocins with antimicrobial activity against Listeria monocytogenes CECT-934, cell-bond biosurfactants and lactic acid on detoxified hydrolyzates in biotechnology processes carried out in Erlenmeyer flasks and 2 L stirred tank bioreactors. |
| Databáze: | OpenAIRE |
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