Accumulated flux and resistances in clarification of sugarcane juice by microfiltration - Impact of operational parameters

 International Food Research Journal, Volume 23, Issue 5, 2016, pp. 2151-2158

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Accumulated flux and resistances in clarification of sugarcane juice by microfiltration - Impact of operational parameters

 Ferreira R.E. * 1, Cozar C.A. 1, Schmidt F.L. 1

Abstract : Effects of operational parameters of microfiltration on permeate flux and individual resistances were evaluated. Assays were undertaken using ceramic membranes (pore size of 0.2 μm). Operational parameters - temperature and transmembrane pressure (TMP) - varied from 25.9 to 54.1°C, and from 1.8 to 3.2 bar, respectively. The main influence on time of processing was exerted by temperature (lowest values for highest temperatures, indicating a relationship to the viscosity). Resistance by irreversible fouling (R) was the most representative, while by membrane (R) was the least. R was influenced by temperature and TMP, although temperature had been the most important. Reversible fouling (R) was also influenced by temperature and TMP, with the first presenting the highest impact. Mathematical models proposed for R and R exhibits good fit to the experimental data, respectively, 95 and 93%. Results found suggest that: higher temperatures contribute for shorter periods of processing; higher TMP contribute for higher initial fluxes; the highest contribution of R to the general total resistance occurred as a function of a considerable blockage of pores of membrane by suspended and colloidal particles; and models proposed for the resistances (R and R) can be applied to predict the experimental data with good accuracy.

Keywords : Ceramic membrane,Fouling,Temperature,Transmembrane pressure

Subject Area : Food Science

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