Impact of Pectin, Cellulose, and Lignin on Membrane Fouling Indicators during Cross-flow Microfiltration of Model Solutions

Abstract

Microfiltration performance has been analysed by evaluating the influence of three macro-compounds as a function of the cross-flow velocity (CFV), transmembrane pressure (TMP) and pore size of the membranes. Four mathematical models were evaluated to relate the permeate flow rate (J p) to the concentration of the macrocompounds in the retentate (C b) during filtration in concentration mode. Pectin has a greater impact than cellulose and lignin on the permeate flux (J p). The largest value of K 2 was found for pectin in the model 1 1 2 − = + ⋅ p b J K K C. The optimum operating conditions and pore size to reduce fouling of the membranes depend on the pore size to particle size ratio and the physicochemical interactions between the solute and membrane. The mathematical model is useful in the region where the permeate flow is nearly independent of pressure, the pore size and cross-flow velocity but is dependent on the diffusional phenomenon of mass transfer.

Influence of the pectin and cellulose on the performance of cross-flow microfiltration

“…Model solutions of pectin and cellulose were prepared based on the content found in tropical fruit juice reported in the literature [6,[11][12][13][14][15][16][17][18][19][20][21][22][23][24] . Different mixtures of these solutions were used, varying the concentration for pectin between 0.25 and 1.5% (%w/w) and for cellulose between 0.04 and 0.15%.…”

Cleaning Methods for Ceramic Ultrafiltration Membranes Affected by Organic Fouling

“…The adherence of hydrophilic and hydrophobic organic substances, generally proteins and polysaccharides, on the membrane surface is referred as organic fouling [19,22]. Higher polysaccharide concentrations in filtering solutions are linked to higher membrane fouling rates [23,24]. In water filtration systems, natural organic matter is considered the main foulant [12].…”