Hybrid process

The purpose of this study is to investigate, through fractionation experiments, the efficiency with which secondary effluents can be treated using UF and MF membranes alone or coupled with coagulation and/or adsorption. The results obtained prove that there are two mains fractions in a secondary eff

The study has been aimed at finding out the specific features in purification of the water contaminated by Co(II) and Ni(II) ions by use of ultrafiltration in combination with chelation. Within an operating pressure range of 200 to 500 kPa, the maximum retention coefficient of Co(II) and Ni(II) ions

Donnan Dialysis is an adequate process to recover metals from dilute solutions, however, when the enrichment is needed, the osmosis phenomenon occurs and reduces the efficiency of the operation. Moreover, a lot of ion exchange membranes are so far from the ideal permselectivity. In this work, the co

A hybrid process combining electrodialysis and a membrane bioreactor was investigated to treat ground waters with excessive nitrate concentrations. Electrodialysis (ED) allowed the nitrate separation producing, on one hand, partially demineralized waters whose ion concentrations were in agreement wi

This study focuses on an hybrid process which couples ultrafiltration and stripping. The aim is to treat spring water to disinfect it and to enhance its pH without adding reactants. The first part of the study focused on stripping in a batch stirred reactor without UF. Air was chosen as the strippin

An electrodeionization post-reverse osmosis (RO/EDI) system was developed for the continuous production of high-purity water without the use of chemicals. The study was carried out with a laboratory pilot. The ion-exchange membrane stack has eight cell-pairs of which four dilute compartments were fi