Membranes

Three commercial membranes (NF70, NF90 and TFC-SR) were firstly characterized in terms of pure water flux and the: rejection of uncharged (alcohols and sugars) compounds. Subsequently, the rejection of monovalent (sodium and chloride) and divalent (calcium and sulphate) ions in single (NaC1, CaC12an

A pilot study for reclamation of secondary treated sewage effluent in Singapore was conducted using a MF/RO system with the capacity of 20 m3/d. A 0.1 µm MF membrane from Asahi and RE-4040-FL RO membrane from Saehan were used in this study. The pilot plant consists of six spiral-wound RO elements. T

Three commercial membranes (NF70, NF90 and TFC-SR) were firstly characterized in terms of pure water flux and the rejection of uncharged (alcohols and sugars) compounds. Subsequently, the rejection of monovalent (sodium and chloride) and divalent (calcium and sulphate) ions in single (NaCl, CaCl2 an

Supports for microfiltration and ultrafiltration were prepared with Tunisian silty marls. Plastic pastes were prepared from a ceramic powder of silty marls mixed with organic additives and water. The pastes could be extruded to elaborate a porous tubular configuration. The supports fired at 1190°C a

Aqueous dispersions of siloxane-urethane copolymers (polysiloxaneurethanes) containing 0–49% of siloxane moieties were synthesized by the modified prepolymer-ionomer method. The properties of the dispersions were determined. Dense membranes were prepared from those dispersions by crosslinking with a

Tajura seawater reverse osmosis desalination plant with a capacity of 10,000 m3/d is the biggest RO plant in Libya. The plant is designed to produce high quality drinking and industrial water. The plant consists of a seawater intake, pretreatment, two stages of reverse osmosis membranes in two lines

Controlling fouling of membrane filtration installations (nanofiltration and reverse osmosis) is a major challenge for the water industry. Fouling affects the plant performance and increases the costs of plant operation. Diagnosis of the type(s) and extent of fouling is the essential first step for

Agricultural drainage water (ADW) may be considered as a strategic reserve to cope with the ever-increasing demand for fresh water. Numerous technological solutions must be examined to enable safe reuse of the ADW. Three technological sets must be addressed simultaneously. The first set is related t

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

For more than 2 years, the extension of the Méry-sur-Oise plant has been producing water from the river Oise, using nanofiltration technology for a production capacity of 140,000 m3/d, a world premiere on surface water. After presenting the reasons for the nanofiltration choice and the treatment pro