Research Abstracts

Studies of extraction of short peptides using supported liquid membranes containing Aliquat 336 as a carrier are presented. The extractions are carried out from an aqueous donor phase with pH ≥ 10 to an acceptor phase containing salt. The mass transfer is driven by the gradient of salt concentration

In modern blood oxygenators, microporous membranes (flat sheet or hollow fibre) are used to separate the blood and gas phases. Blood flows on one side of the membrane while gas (usually oxygen or air) flows on the other side. Since the membranes used are hydrophobic (e.g., polypropylene, Teflon), th

The objective of this work is the future concept of a continuous multiphase enzyme membrane reactor to produce and extract an intermediate opioid peptide (LVVH-7) from a complex hydrolysate of bovine hemoglobin. We report in the first part of this work the production of a decolorized (heme free) fra

This work investigates the use of supported liquid membranes (SLM) in the pertraction of fructose from a mixture of sugars contained in a fermentation broth. Membranes consisted in a porous polypropylene support impregnated with different kinds of carriers using 2-nitrophenyl octyl ether as solvent.

Simultaneous membrane based solvent extraction (MBSE) and membrane based solvent stripping (MBSS) in HF contactors of a heterocyclic carboxylic acid (HCA) of industrial importance from sulphate solutions with solvent containing trioctylamine (TOA) were studied. An effective transport of HCA was achi

D,L-lactic acid and D,L-alanine solutes resolution was studied in supported liquid membrane using a polypropylene hollow-fiber module. The enantioselective transport of solutes was facilitated by N-3,5-dinitrobenzoyl-L-alanineoctylester chiral selector, which was dissolved in toluene organic solvent

Ultrafiltration has been investigated for the concentration of diluted biopolymer solutions. Trials were realized with membranes of different molecular weight cut off (MWCO) and configuration modules. Results indicates that hollow fiber module gives the best results with the membrane of 6 kilodalton

Evaluation of ultrafiltration performance for the purpose of isolation of clavulanic acid from fermentation broths was carried out using two tubular ceramic membranes with molecular weight cut-offs (MWCO) of 15 and 150 kDa and two flat sheet organic membranes with MWCO of 20 and 5 kDa in order to es

An hybrid membrane process for the recovery of citric acid from fermentation broth’s which involves electrodialysis with bipolar membranes (EDBM) is being developed. In this paper the results of EDBM tests performed in a laboratory pilot loop are presented. The most suitable cell configuration and r

Affinity ultrafiltration can provide stereoselective separations using a large macroligand to selectively bind and retain one of the enantiomers. The detailed binding interactions can be strongly influenced by the solution pH and salt concentration, although there is currently little understanding o