Nanofiltration and reverse osmosis as a platform for production of natural botanic extracts: The case study of carob by-products

Abstract

a b s t r a c tCarob kibbles are a low-cost and renewable source of economically relevant phenolic compounds (high value catechin and its derivatives and gallic acid) and abundant in small sugars. This work aims at producing two distinct natural extracts from carob kibbles, one extract enriched in catechin and its derivatives for the nutraceuticals market and an extract enriched in sugars for the food industry. This valorisation strategy involves an integrated process based on membrane technology that fulfils the zero discharge principle and may be applied to other agro-industrial by-products. Different aqueous extraction schemes were considered (a one-step process and a two-steps approach). The aqueous extracts obtained were fractionated by diananofiltration and the fractions obtained were evaluated in terms of their content in target products. An integrated scheme for production of fractionated extracts is proposed based on the experimental work developed assuring, simultaneously, a minimal use of resources and emission of waste.Ó 2015 Published by Elsevier B.V.

Purification of Arabinoxylans from Corn Fiber and Preparation of Bioactive Films for Food Packaging

“…In Figure 3b, in the range of diafiltration volume values where the apparent rejection remained constant, the percentage of removal of charged contaminants (in. NaCl.eq) and contaminants (in FA.eq) may be estimated by Equation (6), explained in detail in the Supplementary Materials, based on [29]:…”

“…Membranes 2020, 10, x FOR PEER REVIEW 11 of 22 contaminants (in. NaCl.eq) and contaminants (in FA.eq) may be estimated by Equation 6, explained in detail in the Supplementary Material, based on [29]:…”

Continuous and pulsed ultrasound-assisted extraction of carob’s antioxidants: Processing parameters optimization and identification of polyphenolic composition

“…In addition, despite its extensive use in phytochemicals analysis, capillary electrophoresis (CE) has not been previously applied for both the qualitative and quantitative determination of carob pulp phenolics. Although Roseiro et al (2013) and Almanasrah et al (2015) attempted to analyse carob pulp phenolics by use of a CE system, they failed to achieve a complete separation, identification and quantification of the target analytes [7] , [22] , [23] .…”

Separation and purification of plant terpenoids from biotransformation

“…In terpenoids separation or purification, membrane is often applied to terpenoids with high added value and difficult separation, especially those terpenoids that are difficult to separate through simple extraction and crystallization. Depending on the physicochemical composition of membrane such as charge, pore size, surface topography or hydrophilicity/hydrophobicity, even the integrated function of separation processes, the most employed for the recovery of terpenoids include microfiltration(MF), ultrafiltration(UF), nanofiltration(NF), reverse osmosis, electrodialysis, and emulsification separation [31, 32]. The essence of them is to use different substances to pass through the membrane with different transfer rates to achieve separation.…”