2014
EMSS 2014 Proceeding
A friday 13th risk model for failure in cross - flow membrane filtration of passion fruit juice
Authors: Wei Zou, Kenneth Davey
Abstract
Membrane filtration for clarification is a widespread unit-operation in the beverage industries. Unexpected membrane fouling (failure) can significantly reduce clarification efficiency. A Friday 13th (Fr 13) risk model for membrane failure is developed and illustrated with independent data for yellow passion fruit juice (Passiflora edulis var. flavicarpa) and a comparison made with a traditional evaluation. The aim was to gain insight into the risk of stochastic impact on failure in a well-operated cross-flow membrane plant used in juice clarification. A risk factor (p) is defined in terms of the design permeate (J?) and actual critical (Jcritical), flux. A refined Monte Carlo sampling of transmembrane pressure (?P) and filtration time (t) is used to simulate membrane behavior. Results reveal that some 7 % of all filtrations will fail to achieve Jcritical with a practical tolerance and typical commercial conditions over an extended period. This insight is not available from traditional evaluation.
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