Production of purified hemicellulose-pectin fractions of different molecular weight from discarded carrots by hydrothermal treatment followed by multistep ultrafiltration/diafiltration
| Autor: | Beatriz Aguilera-Torre, Marta Ramos-Andrés, Juan García-Serna |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
food.ingredient
Chromatography Pectin Molecular mass Renewable Energy Sustainability and the Environment Chemistry Strategy and Management Dispersity Ultrafiltration Building and Construction Pectina Permeation Hemicelulosa Polydispersity Hemicellulose Industrial and Manufacturing Engineering Diafiltration chemistry.chemical_compound food Membrane Polidispersidad General Environmental Science |
| Zdroj: | UVaDOC. Repositorio Documental de la Universidad de Valladolid instname |
| Popis: | Producción Científica Hemicelluloses and pectins are good candidates as biopolymers for the formation of products such as packaging films. Purified freeze-dried fractions of hemicelluloses and pectins, of different molecular weights, were obtained by treating hydrothermal extracts (140, 160, and 180 °C) of discarded carrots with ultrafiltration membranes (30, 10, 5, and 1 kDa). After each ultrafiltration, several cycles of diafiltration with partial water reuse were applied, obtaining a better separation and purification. A cascade configuration (30-10-5-1 kDa) was used in the 140 and 160 °C extracts, and a mixed configuration (5-10-1 kDa) in the 180 °C extract. High molecular weight hemicelluloses increased in concentration by a factor of 5 in the cascade configuration and by a factor of 16.67 in the mixed configuration. A high removal of free sugars (98.9–99.5 wt%) and by-products (94.4–99.2 wt%) through 1 kDa permeate and diafiltration waters was obtained. The system allowed moving from feeds with molecular weight, polydispersity, and purity in the ranges 9.02–18.83 kDa, 16.2–31.6, and 30.12–33.51 wt% to fractions with values in the ranges 2.59–102.75 kDa, 1.2–4.0, and 73.1–100 wt%. Junta de Castilla y León - Fondo Europeo de Desarrollo Regional (project CLU-2019-04) Ministerio de Ciencia, Innovación y Universidades - Fondo Europeo de Desarrollo Regional (project PID2019-105975GB-I00) Ministerio de Educación, Cultura y Deporte (contract FPU15/06366) |
| Databáze: | OpenAIRE |
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