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Treatment of textile wastewaters with dynamic membranes
Amorim, M. T. Pessoa de; Ramos, Ilia Rosa AfonsoThe use of dynamic membranes formed in situ by deposition of a colloidal suspension on a porous support as a pretreatment of membranes is an attractive method to reducing irreversible membrane fouling. A polyethersulfone, PVDF, membrane with a neutral load, hydrophilic character and a cut-off of 30,000 Dalton was studied after treatment with hydrophilic polymers, such as polyetylenoglycol and polyvinyl alcohol....
Yeast flocculation: a new method for characterising cell surface interactions
Azeredo, Joana; Ramos, Ilia; Rodrigues, L. R.; Oliveira, Rosário; Teixeira, J. A.Flocculation is a property of yeast cells that has been traditionally used in industrial fermentations, especially in the brewing and wine industries. It is a cell wall interaction and an increase in flocculation is strongly correlated with an increase in cell surface hydrophobicity. Methods to assay yeast cell surface hydrophobicity are only qualitative and while electrostatic interactions can play an importa...
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