Membrane

White biotechnology for the production of fine chemicals will substitute some chemistry based on petrol and gas in the near future. A standard process for this technology is fermentation. The downstream treatment with membranes is an essential and cost-intensive part of the processing. For downstrea

Integration of membrane technology into a new method for a recirculating aquaculture system (RAS) was investigated. Main objectives were: at first to reduce the water consumption, but not to exceed the critical concentrations for fish toxic water ingredients (especially nitrite and ammonium or ammon

The transport of zinc complexes ions through an anion exchange membrane was evaluated by the treatment of solutions with and without cyanide. The ionic transport was analyzed as a function of the applied current density and of the cyanide and hydroxyl concentration. Experimental results showed that

The aim of the study was to compare the removal efficiency of anionic surfactant (belonging to alkylbenzenesulfonate family) from water solutions by means of ultrafiltration and ion-exchange. During the first stage of the experiments, the influence of surfactant type and its concentration, membrane

The aim of this work is the performance study of the various stages of groundwater treatment in a pharmaceutical industry. We were particularly interested in the influence of the reverse osmosis on the data processing sequence. The water quality was evaluated in terms of conductivity; the performanc

The main objective of this work was to investigate and compare the removals of boron from model solutions (boron as single solute in distilled and deionized water) and seawater using two commercial high rejection SWRO membranes. The impacts of dissolved solids in seawater and pH on boron rejection a

Asymmetric blend hollow fiber membranes had been made from a new casting dope containing poly(vinylidene fluoride) (PVDF)/Thermoplastic polyurethane (TPU)/Polyvinylpyrrolidone (PVP) N, N-dimethylacetamide (DMAc). The effect of hydrophilic additive, polyvinylpyrrolidone, on the morphology and crystal

There has been a growing interest in the use of inorganic membrane for several industrial and laboratory applications. This is because they offer many advantages over organic counterparts in separation processes. These include resistance to compaction under high pressure, chemical stability at high

Infiltration of surface water into the ground and a retention time of 50 days is a natural method to remove color, iron and manganese — which are typical for Nordic lake waters — and to produce a good quality drinking water. However, due to the geological situation in the Southern parts of Finland,

Ultrafiltration (UF) and microfiltration (MF) are theoretically the best pre-treatment upstream reverse osmosis, removing from the feed water most of the potential elements responsible of desalinating membranes fouling such as particles, turbidity, bacteria and large molecular weight organic maters.