Research Abstracts

A two-stage electrodialysis (ED) method was used for lactic acid recovery. In the first step sodium lactate was concentrated with desalting electrodialysis using ion exchange membranes Ralex (Mega, Czech Republic). The second step was the electroconversion of sodium lactate to lactic acid by electro

In the membrane phase contactor, the rate of reagent mass transfer from organic phase (a reservoir) to water phase (a reaction phase) depends on the three different resistances: the organic phase resistance, the resistance generated by the membrane and the water phase resistance. In the case when th

Equations describing a multi-phase bioreactor with a catalytic membrane located on the boundary of phases, of which one is a substrate reservoir, were formulated. A model analysis of the process was carried out and the effect of main operating parameters of such a reactor, i.e., the catalytic layer

To extend the service life and to improve the quality of degreasing solutions from surface refining processes in the metal working industry a process based on a membrane bioreactor (MBR) with submerged multi-channel flat sheet ceramic membranes was developed. This MBR-based regeneration process comb

This paper presents a study of enzymatic esterification of oleic-acid and i-amyl alcohol. The product of this reaction, i-amyl-oleate, is widely used as a bio-lubricant. During the esterification reaction, water is produced as a by-product, which has a disadvantageous effect on the reaction rate and

Membrane separation processes were applied in the fumaric acid — L-malic acid bioconversion. Electrodialysis was found suitable to recover the free malic acid from its salt (malate), formed in the reaction. Moreover the electrodialytic separation method can be on-line connected to the biochemical pr

Concentrated must is a natural sweetener in wine production, and in addition, it is a vitamin- and aroma-rich drink. In this study the basis of a complex membrane process was developed for must concentration. Modeling the experimental results and using recent economic data, the optimal process param

Currently it is very important that good-quality products are produced at an adequate price. In the case of instant coffee there are several production technologies. Some of these technologies do not provide good quality, and others — while the quality of the product is good — the cost is too high a

Whey is a by-product of cheese production which is used mainly as animal feed or released into the wastewater treatment process, although it is rich in valuable components. Recent developments in membrane filtration have provided exciting new opportunities for large-scale protein and lactose fractio

The aim of this study was to investigate membrane filtration for must processing and to carry out a complex method for preservation and concentration of grape must. In the experiments white and red grape-juice samples were used. After the transportation of the samples in to the laboratory the impact