Solvents can hinder MSP Participating Units: Embrapa Agroindústria de Alimentos Definition Of The Limiting Flux In The Nanofiltration Of A Grape Marc Extract Containing 30% Ethanol Ana Paula Gil Cruz¹*, Natalia Barbosa Eitel², Luiz Fernando Menezes da Silva³, Suely Pereira Freitas², Alexandre Guedes Torres¹, Lourdes Maria Correa Cabral3 1. Universidade Federal do Rio de Janeiro/UFRJ, Instituto de Química, Rio de Janeiro, Brasil. - ana_gil@uol.com.br. 2. Universidade Federal do Rio de Janeiro/UFRJ, Escola de Química, Rio de Janeiro, Brasil. 3. Embrapa Agroindústria de Alimentos. Avenida das Américas, 29501, CEP 23020-470 Rio de Janeiro – RJ Introduction Methods - Energy savings - Selectivity - Separation of thermolabile comp. - Simplicity Solvents can hinder MSP Pros Limiting Factor Nanofiltration Hydration without stirring at T = 30 ° C Extraction at 50 ° C for 120 minutes at 48RPM Centrifugation Determination of the limiting flux at 20, 30 and 40°C at a flow rate of 700 L h-1 Economic viability of NF depends on defining some important parameters such as: Membrane properties Membrane-solute affinity Temperature and transmembrane pressure Results Figure 1 – Limiting flux These parameters influence directly the limiting flux! Aim of this Study Determine the limiting flux in the nanofiltration of a Pinot noir grape marc extract containing 30% ethanol. Materials Conclusion Pinot Noir Grape Marc NF system: composed of a polyamide spiral wound membranes with Tmax= 45°C. Increasing temperature and pressure had a positive influence in the permeate flux (Fig. 1) Limiting flux reached at 20°C and 30°C with P=16 bar, and at 40°C with P=12 bar