Reverse osmosis

In nanofiltration and reverse osmosis membrane systems 75–90% of the feed water is conversed to product, and as a consequence dissolved compounds are concentrated in the membrane concentrate. Subsequently, sparingly soluble inorganic compounds such as calcium carbonate and barium sulphate become sup

This paper traces the history of large-scale work-exchanger energy recovery systems from early concepts; the first seawater reverse osmosis application in 1975; through the present state of the art. Work-exchanger technology, while fairly simple in concept, has undergone a tremendous amount of evolu

Wastewater reuse is a very reliable source of water supply for water short areas. Integrated membrane systems (IMS), microfiltration or ultrafiltration followed by reverse osmosis (RO), are frequently used for these applications to reliably produce high quality water for aquifer recharge, industrial

One of the major options for the remedy of water shortages in the Gaza Strip of Palestine, and the protection of its coastal aquifer from either depletion and/or becoming saline, is the utilization of desalination technology for brackish and seawater in that region. Other effective options for water

Following laboratory-scale research as part of the LIFE programme, a pilot plant with a capacity of 30 m3/d was built. This plant allowed the optimization of the parameters necessary for the engineering analysis, as well as the extrapolation of results and the development of a treatment plant with a

In 1996, construction was started at Alicante University for a reverse osmosis desalination plant, which began operating in 1997. The water produced has been used for irrigation of the green zones of the campus. The plant was working discontinuously, during trial periods, and when regular supplies o

This paper is intended to describe some of the experiences in Malta in the application of desalination technology. This is put in the context of its relevance to national development and the economy, to the technology environment where it fitted and to its contribution to and impact on integrated wa

Recent developments in desalination technology have resulted in significant savings in cost compared with earlier plants. Both distillation and reverse osmosis processes are now viable means of water production from a seawater source in the developing countries of the MENA area as well as in the mor

Reverse osmosis (RO) has been established as a reliable process for seawater desalination. The reliability of the RO technique depends upon the extent of the pretreatment that must be designed to reduce the suspended and colloidal materials in the feedwater. During the last 15 years of research and

We propose a network architecture based on adaptive receptive fields and a learning algorithm that combines both supervised learning of centers and unsupervised learning of output layer weights. This algorithm causes each group of radial basis functions to adapt to regions of the clustered input spa