TY - JOUR
T1 - Valorization of olive pomace by a green integrated approach applying sustainable extraction and membrane-assisted concentration
AU - Nunes, M. Antónia
AU - Pawlowski, Sylwin
AU - Costa, Anabela S. G.
AU - Alves, Rita C.
AU - Oliveira, M. Beatriz P. P.
AU - Velizarov, Svetlozar
N1 - info:eu-repo/grantAgreement/FCT/5876/147218/PT#
The authors thank the financial support to the project Operacao NORTE-01-0145-FEDER-000011 - denominada Qualidade e Seguranca Alimentaruma abordagem (nano) tecnologica. This work was also supported by the Associated Laboratory for Sustainable Chemistry - Clean Processes and Technologies (LAQV), which is financed by Portuguese national funds from FCT/MEC (UID/QUI/50006/2013) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265).
M. Antonia Nunes acknowledges the PhD fellowship (SFRH/BD/130131/2017) funded by the Foundation for Science and Technology (Portugal).
PY - 2019/2/20
Y1 - 2019/2/20
N2 - Olive pomace is a semi-solid paste resulting from the two-phase olive oil production, being the most significant waste generated by this agro-industry. Olive pomace is reported as an environmental hazard due to its high content in phenolic compounds (phytotoxic). Nevertheless, these compounds, when recovered, can have impactful actions in different human physiological conditions, namely, skin protection, dysfunction treatment or diseases prevention. Therefore, their recovery from olive pomace is crucial for environmental and economical sustainability, without forgetting the functional challenge. In a previous work, lipid and aqueous fractions of olive pomace were studied regarding its major bioactive compounds. The present research aims to describe an environmentally friendly integrated approach to extract and concentrate (by a pressure-driven membrane processing) the phytotoxic compounds of olive pomace. Three types of polymeric composite membranes (NF90, NF270 and BW30) were tested. The composition of the resulting streams (permeates and concentrates) were compared and the process efficiency assessed based on: (1) antioxidant activity and total phenolic and flavonoid contents; (2) inorganic elemental composition (by Inductively Coupled Plasma Atomic Emission Spectroscopy); (3) pH, conductivity and total organic carbon; and (4) permeate flux, membranes' apparent target solutes rejection and fouling index. The BW30 membrane presented the lowest fouling index and was the most effective for extracts concentration, with no phenolic compounds in the permeates, preventing completely the loss of such compounds.
AB - Olive pomace is a semi-solid paste resulting from the two-phase olive oil production, being the most significant waste generated by this agro-industry. Olive pomace is reported as an environmental hazard due to its high content in phenolic compounds (phytotoxic). Nevertheless, these compounds, when recovered, can have impactful actions in different human physiological conditions, namely, skin protection, dysfunction treatment or diseases prevention. Therefore, their recovery from olive pomace is crucial for environmental and economical sustainability, without forgetting the functional challenge. In a previous work, lipid and aqueous fractions of olive pomace were studied regarding its major bioactive compounds. The present research aims to describe an environmentally friendly integrated approach to extract and concentrate (by a pressure-driven membrane processing) the phytotoxic compounds of olive pomace. Three types of polymeric composite membranes (NF90, NF270 and BW30) were tested. The composition of the resulting streams (permeates and concentrates) were compared and the process efficiency assessed based on: (1) antioxidant activity and total phenolic and flavonoid contents; (2) inorganic elemental composition (by Inductively Coupled Plasma Atomic Emission Spectroscopy); (3) pH, conductivity and total organic carbon; and (4) permeate flux, membranes' apparent target solutes rejection and fouling index. The BW30 membrane presented the lowest fouling index and was the most effective for extracts concentration, with no phenolic compounds in the permeates, preventing completely the loss of such compounds.
KW - Bioactive compounds
KW - Nanofiltration
KW - Olive pomace
KW - Phytotoxicity
KW - Reverse osmosis
KW - Sustainability
UR - http://www.scopus.com/inward/record.url?scp=85055122329&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2018.10.204
DO - 10.1016/j.scitotenv.2018.10.204
M3 - Article
C2 - 30352345
AN - SCOPUS:85055122329
SN - 0048-9697
VL - 652
SP - 40
EP - 47
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -