Sánchez-Arévalo Carmen M, Pérez García-Serrano Ane, Vincent-Vela María Cinta, Álvarez-Blanco Silvia
Research Institute for Industrial, Radiophysical and Environmental Safety (ISIRYM), Universitat Politècnica de València, Camino de Vera, s/n, 46022 Valencia, Spain.
Department of Chemical and Nuclear Engineering, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
Membranes (Basel). 2023 Jan 17;13(2):119. doi: 10.3390/membranes13020119.
Despite the environmental concerns raised every year by the generation of high volumes of wet olive pomace, it contains valuable phenolic compounds that are essential for the valorization of this by-product. In this work, an integrated process to recover phenolic compounds from wet olive pomace is proposed. It consists of ultrasound-assisted solid-liquid extraction, followed by ultrafiltration and nanofiltration. Several commercial membranes were studied at different operational conditions. The ultrafiltration stage allowed the purification of biophenols, which were obtained in the permeate stream. Regarding organic matter, satisfactory rejection values were obtained with both commercial UH030 and UP005 membranes (Microdyn Nadir), but the latter provided more efficient purification and higher values of permeate flux, above 18 L·h·m at 2.5 bar and 1.5 m·s. Later, this permeate stream was concentrated by means of a nanofiltration process, obtaining polyphenol rejection values that surpassed 85% with the commercial NF270 membrane (DuPont), then achieving the concentration of the previously purified polyphenols.
尽管每年因产生大量湿橄榄果渣而引发环境问题，但它含有有价值的酚类化合物，这些化合物对于该副产品的增值至关重要。在这项工作中，提出了一种从湿橄榄果渣中回收酚类化合物的综合工艺。该工艺包括超声辅助固液萃取，随后进行超滤和纳滤。在不同操作条件下研究了几种商用膜。超滤阶段实现了生物酚的纯化，生物酚在渗透物流中获得。关于有机物，使用商用UH030和UP005膜（Microdyn Nadir）均获得了令人满意的截留值，但后者提供了更高效的纯化效果和更高的渗透通量值，在2.5巴和1.5米/秒的条件下，渗透通量超过18升·小时·平方米。随后，通过纳滤工艺对该渗透物流进行浓缩，使用商用NF270膜（杜邦）获得的多酚截留值超过85%，从而实现了对先前纯化的多酚的浓缩。
