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DYNA

versão impressa ISSN 0012-7353

Resumo

FORERO LONGAS, FREDDY  e  VELEZ PASOS, CARLOS ANTONIO. OPTIMIZATION OF THE CONCENTRATION BY OSMOTIC EVAPORATION OF PASSION FRUIT JUICE (Passifora edullis). Dyna rev.fac.nac.minas [online]. 2013, vol.80, n.179, pp.90-98. ISSN 0012-7353.

Passion fruits were harvested in Gigante, Huila (Colombia), selected and characterized physicochemically, the juice was ultrafiltered in a Pellicon2® system with flat membranes (10 kDa) and area 0.5 m2. For optimization was used an experimental design kind response surface, studying the effect of 3 factors: juice flow rate, brine flow rate and temperature, over the flux and final soluble solids. The osmotic evaporator was a hydrophobic hollow fiber module (MD020CP2N®) with area 0.104 m2 and brine 45% w/v (CaCl2) as stripping solution. The concentrated presented excellent quality characteristics, ultrafiltration was effective in preventing fouling in evaporation membrane, by lowering viscosity and turbidity of juice. Were found to be optimal operating conditions: temperature 31 (°C), brine flow 242 (ml/min), flow juice 146 (ml/min), with which it reached a final concentration of 52.25 ± 0.36 °Brix and a flux of 0.52 (kg/m2h).

Palavras-chave : Concentration; Osmotic Evaporation; Ultrafiltration; Membranes; fruit juices.

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