2.2.1. Reverse osmosis
The pre-concentration of the clarified juice by reverse osmosis
was performed in a plate and frame reverse osmosis system Lab
Unit 20 (DSS, Silkeborg, Denmark), composed of HR98PP thin film
composite membranes (DSS, Silkeborg, Denmark), with 98% nominal
rejection to a 0.25% NaCl solution and permeation area of
0.288 m2. The process was carried at 20 C and 60 bar, according
to Rodrigues et al. (2004).