An integrated two-step Fr 13 synthesis - demonstrated with membrane fouling in combined ultrafiltration-osmotic distillation (UF-OD) for concentrated juice

• Published in: Chemical engineering science 2016-10, Vol.152, p.213-226
• Main Authors: Zou, Wei, Davey, Kenneth R.
• Format: Article
• Language: English
• Subjects: Concentrated juices; Fr 13 risk; Fr 13 risk assessment; Membrane fouling; Pomegranate juice (Punica granatum); Ultrafiltration-osmotic distillation
• ISSN: 0009-2509; 1873-4405
• DOI: 10.1016/j.ces.2016.06.020

Here we synthesize a two-step Fr 13 risk assessment (Davey et al., 2015; Davey, 2015) for the first time. We demonstrate it with vulnerability to fouling in an apparent steady-state global process of integrated cross-flow ultrafiltration and osmotic distillation (UF-OD) for concentration of fruit juice. Integrated two-step membrane processing of juices is becoming widespread as an alternative to thermal treatment. The aim was to advance the Fr 13 framework to investigate how naturally occurring, random fluctuations in apparent steady-state plant parameters can be transmitted and impact in progressively multi-step complex (i.e. integrated not ‘complicated’) processes. Membrane behavior is simulated using Monte Carlo (with Latin Hypercube) sampling of transmembrane pressure (∆PUF 1-1) and filtration time (tUF 1-1) with independent data for concentrating pomegranate juice (Punica granatum). Membranes fouling is defined as a permeate flux less than the operational design flux. Overall global failure of the integrated two-step UF-OD is defined as an unwanted OD flux (JOD 1-2