Reverse osmosis

When using NF/RO membranes in large-scale (drinking) water applications a stable operation of the installation is required to minimize costs. Fouling of membranes will cause an increase in costs due to an increased energy demand, additional labor and costs for cleaning and a shorter lifetime of the

Membrane fouling is a frequent problem in most seawater reverse osmosis units, particularly when raw water is drawn from an open sea intake. Membranes tend to foul slowly, which makes it necessary to perform periodic cleanings with physical and chemical products, which in turn produce a decrease in

The need for good-quality water in Cyprus continues to be the driving force for the use of reverse osmosis to desalinate brackish water and seawater for irrigation and potable use. Much work continues both to optimize the process designs for new plants and to refine the operation of existing ones. T

Silica is one of the major foulants in desalination of brackish water. Its presence limits the water recovery and in addition once foulant is formed, the removal and cleaning is almost impossible. Therefore, the aim is to prevent silica fouling from the inception. One of the many complicating factor

To prevent reverse osmosis (RO) membrane fouling, all the organic, colloidal and biological matter needs to be removed from the feed water to the RO system. A proper pretreatment is therefore considered to be the key to successful RO plant operation. A key component of the RO pretreatment process is

Desalination plays an important role in producing pure water from brackish water. Reverse osmosis (RO) is by far the most efficient way to remove colloidal and dissolved silica, which can be found in high concentrations in brackish water. The presence of silica and its ability to foul membranes limi

Recent studies dealing with the potential of Renewable Energy Sources (RES) for desalination along the Mediterranean Coast and in the Middle East choose to use RES to generate electricity first, and then use this electricity to power desalination. The present work eliminates the phase of electricity

The Larnaca desalination plant has been designed for extended capacity of 54,000 m³/d high-grade potable water. Deep-seated open intake, low velocity dual-media filters and low flux desalination process will give high plant availability. Lower power consumption is achieved by dividing the product in

This paper is related to potential problems associated with the desalination performance of reverse osmosis (RO) units in conditions when the feed may be contaminated with crude oil and fuel oil spillages. The work has involved the examination of the behaviour of polyamide seawater membranes and bra

The comparison between two membrane separation processes, like reverse osmosis (RO) and nanofiltration (NF), and the interaction between membrane and pollutant in water cleaning-up were studied. The separation efficiency of pollutants like silica, nitrate, manganese and humic acids (HA) by means of