Reverse Osmosis

The concentration of pretreated blackcurrant (Ribes nigrum L.) juice by reverse osmosis (RO) membrane was investigated in this study. The pretreatment steps were crushing, enzyme dosage, pressing and then clarification of the raw juice by ultrafiltration (UF). Polyethersulphone, tubular UF membrane

By-products obtained from red currant processing still contain large amounts of useful components, e.g. pectin. Pectin was extracted from red currant marc with water at a solid/liquid ratio of 1:10. To reduce the operating costs of further possessing, we concentrated the pectin solution by membrane

The aim of this study was to examine the applicability of reverse osmosis (RO) for the concentration of blackcurrant juice by AFC-80 polyamide tubular membrane that has a salt rejection greater than 80%. The fresh juice had a total soluble solids content of about 16.58Brix. The effect of centrifugat

The mining industry uses large amounts of explosives and a part of them remains undetonated. Since most commercial blasting agents contain ammonium nitrate, there is a direct relationship between explosives use and the ammonium and nitrate levels in mine effluents. Water contamination with nitrogeno

Wastewater reclamation and reuse are being widely implemented due to the lack of fresh water. When salinity is a limiting parameter to obtain the required water quality for agricultural uses, a desalination step is necessary to achieve it. Therefore, techniques such as nanofiltration (NF) or reverse

Copper rejections of a nanofiltration (NF) and a reverse osmosis (RO) membrane are investigated with coppersulfate and copper-nitrate solutions as test wastewaters. The copper content of the solutions represents the typical copper ion concentration of process waters from a textile coating plant, i.e

The paper deals with evaluation of adsorption-membrane filtration (AMF) hybrid process in removal of trace amounts of boron from the first stage RO permeate. Finely ground boron selective resin, Dowex XUS 43594.00, was used as sorbent while polypropylene capillaries with pore dimension of 0.4 mm as

Desalination of brines produced from oil and gas fields is a potential resource for potable water in the southwestern U.S. and other semi-arid areas. Oilfield brines typically contain high concentrations of Na+ and Cl!, as well as other multivalent cations and anions that can reduce efficacy of reve

Pressure driven membrane processes are characterized by their low specific energy consumption. Since they constitute a mechanical separation without phase or temperature change, they are least energy intensive. This study focused on further energy reduction. Process industries (chemical, food, mecha

An investigation was conducted to determine the feasibility of using reverse osmosis (RO) membranes to treat water containing up to 50% (by volume) oil. The effect of varying the feed pressure, pH and temperature on separation performance of two thin film composite polyamide RO membranes was evaluat