Hyperfiltration of Tomato Juice: Pilot Plant Scale High Temperature Testing |
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| Authors: | C A MERLO W W ROSE L D PEDERSEN E M WHITE J A NICHOLSON |
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| Affiliation: | The authors are with the National Food Processors Association, 1950 Sixth St., Berkeley, CA 94710. |
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| Abstract: | A two-stage tubular hyperfiltration (reverse osmosis) pilot plant equipped with 15.6 m2 of aromatic polyamide thin film composite membrance (ZF 99) was studied with tomato juice (4–6% natural tomato soluble solids NTSS]). It was operated over 100 hr in recirculation and single pass modes. The single pass mode was operated at33–38 bar (feed inlet pressure) and 70–93°C for 18.2 hr. Stage 1 flux was 48 to 34 Lm?2hr?1. Stage 2 flux was 30 to 20 Lm?2hr?1. Concentration went to 7.4–9.0% NTSS at 8.6 L/min, and to 6.3–6.4% NTSS at 18.6 L/min. NTSS rejection was >98%. Of permeate samples tested none showed detectable levels of sugars; only 25% showed detectable levels of organic acids. |
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