Recovery of phenolic compounds from residual table olive fermentation brines by nanofiltration at different operating conditions
[EN] Nanofiltration membrane process has been investigated for the recovery of phenolic compounds from residual pickle industries, such as residual table olive fermentation brines. Two polyamide membranes were considered: NF245 and NF270 (DOW Chemical). Tests were performed varying the transmembrane...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/220087 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/220087 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanofiltration Polyamide membranes Residual table olive fermentation brine: Phenolic compounds Kedem-Spiegler model 02.- Poner fin al hambre, conseguir la seguridad alimentaria y una mejor nutrición, y promover la agricultura sostenible 11.- Conseguir que las ciudades y los asentamientos humanos sean inclusivos, seguros, resilientes y sostenibles 15.- Proteger, restaurar y promover la utilización sostenible de los ecosistemas terrestres, gestionar de manera sostenible los bosques, combatir la desertificación y detener y revertir la degradación de la tierra, y frenar la pérdida de diversidad biológica |
| Sumario: | [EN] Nanofiltration membrane process has been investigated for the recovery of phenolic compounds from residual pickle industries, such as residual table olive fermentation brines. Two polyamide membranes were considered: NF245 and NF270 (DOW Chemical). Tests were performed varying the transmembrane pressure (TMP) and crossflow velocity (CFV) from 5 to 15 bar and from 0.5 to 1.5 m¿s 1 , respectively. The NF245 membrane provided a better separation between organic matter and phenolic compounds. With this membrane, the largest phenolic compounds/chemical oxygen demand (COD) ratio in the permeate stream (0.195 mg ty eq/mg O obtained at the following operating conditions: CFV of 1.5 m¿s 1 2 ) was and a TMP of 15 bar. Under these conditions the permeate flux was 31.9 L¿h 1 ¿m 2 , while the elimination of turbidity was complete and color reduction was close to 91 %. The salts rejection, COD and phenolic compounds were 25 %, 64.7 % and 35.2 %, respectively. The pH of the permeate samples did not vary respect to the feed solutions. Furthermore, the values of permeate flux were compared to the predictions from the Kedem-Spiegler model. The permeate flux reduction in comparison with pure water flux was mainly caused by the osmotic pressure gradient. Moreover, NF270 membrane suffered greater membrane fouling than NF245 membrane. |
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