Research Abstracts

Membrane separation technologies applied to protein purification is an interesting development that has seen growth in recent years. However, studies about the long-term effects of the cleaning stage, considering different chemical agents and operating conditions, on the performance of the membranes

Membrane-based virus filtration is used in biotechnological processes due to advantages such as easy scaleup but is currently lacking standardized validation protocols. Thus, ultrafiltration (UF) of a rod-shaped virus was assessed to contribute to the body of knowledge regarding the characterization

Physical, chemical and biological methods have been described to remove phenolic compounds. None of them are the definitively solution of the environmental problem caused by the discharge of this pollutants. Hybrid processes that combine pressure driven membrane processes with adsorption processes h

The possibility of olive mill wastewaters (OMW) treatment and concentration by membrane distillation has been investigated. The objective is to obtain pure water and a concentrate containing high amounts of polyphenols, which can be extracted later. Two types of commercial membranes, polytetrafluoro

Polyamide 6.6 (PA 6.6) membranes were modified with glutaraldehyde, in a phase inversion process. Immobilization of the enzyme laccase from Pleurotus sajor-caju in the modified PA 6.6 film was quantified in the presence of the reducer 2,2’-azino-bis-3-ethylbenzoazoline-6-sulfonate (ABTS). Under thes

The studies of a conversion of KCl with H2SO4 into KHSO4 were performed using a reactor associated with direct contact membrane distillation (DCMD). Polypropylene (PP) capillary membranes were used in the experiments. The feed comprised of solutions containing 1 mol of KCl with various initial conce

The separation of lactobionic acid (LBA), a product of a biotechnological process catalyzed by the enzymes glucose-fructose oxidoreductase and glucono-δ-lactonase of the bacteria Zymomonas mobilis, was studied using ion selective membranes in electrodialysis (ED). The recovery of LBA, present in a s

This study aims to find a new die purification for wastewater reuse. It consists of the filterability of biological sludge exits of the wastewater treatment plant at Staoueli (Algeria) on porous membranes. The membrane used is a mineral membrane M2 Carbosep (15 Kg/mol). we are interested for the fir

In nanofiltration it is important for predictive purposes to obtain retentions and/or reflection coefficients from known sizes of the pores and the molecules of uncharged solutes. This correlation is also needed in order to model the mass transport of salts or other charged species. To complete thes

The effect of sandwich configurations of paired ultrafiltration membranes on the transmission and rejection of proteins were evaluated using various sandwich arrangements. Data is presented for the fractionation of BSA and myoglobin, and for that of lysozyme and myoglobin. Two membranes were sandwic