Optimization and modeling of two-phase olive-oil washing wastewater integral treatment and phenolic compounds recovery by novel weak-base ion exchange resins Ochando Pulido, Javier Miguel Vellido Pérez, José Antonio González Hernández, Rubén Martínez Férez, Antonio Olive-oil washing wastewater Ion exchange Resins Phenolic compounds Wastewater reclamation Sustainability In light of the Circular Economy concept, recently emerged as a need for sustainable production, olive oil industry should be concerned to transform the whole process into environmentally friendly, which necessarily implies the treatment of the wastewater by-produced in olive mills. In this work, concentration and recovery of high-added value phenolic compounds from two-phase olive-oil washing wastewater (OOWW) and parallel effluent treatment by a ‘green process’ based on novel weak-base ion exchange (IE) resins was addressed. The key operating input factors of the resin process for the treatment and valorization of OOWW were studied, optimized and further modelled. A Box-Behnken design was implemented and the obtained data were analyzed by ANOVA and interpreted by RSM methodology. The process was ulteriorly modelled by a second-grade quadratic fitting equation comprising the significant operating variables. The optimization of the IE process performance (20.3 °C, pH0 6.7 and 114 g/L Mresin) ensured up to 92.5% recovery of total phenols concentration. Moreover, the purified stream presented good quality (56.6–83.7 mg L−1 total phenols), following standard recommendations by the FAO. The obtained information would be of key importance for the scale-up of the proposed IE operation. Both the treatment and revalorization of OOWW would help implement a definite sustainable production process of olive-oil. 2023-01-16T07:53:05Z 2023-01-16T07:53:05Z 2020-05-24 info:eu-repo/semantics/article J.M. Ochando-Pulido, J.A. Vellido-Perez, R. Gonzalez-Hernandez, A. Martinez- Ferez. Optimization and modeling of two-phase olive-oil washing wastewater integral treatment and phenolic compounds recovery by novel weak-base ion exchange resins. Sep. Purif. Technol. 249 (2020), 117084. [https://doi.org/10.1016/j.seppur.2020.117084] https://hdl.handle.net/10481/79001 https://doi.org/10.1016/j.seppur.2020.117084 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier