Seawater reverse osmosis

Water quality sampling and analysis conducted at four global locations, along the shorelines of the Arabian Sea, the Red Sea, the Mediterranean Sea, and the Caribbean Sea, demonstrated that subsurface intakes (wells) provide a robust degree of feed water treatment close to that provided by energy-in

As known, positive displacement (PD) energy recovery device (ERD) transfers hydraulic energy from the ejected brine of the RO modules directly to the seawater feed and its energy recovery efficiency achieved can be as high as 95% or more. The PD type ERD has been concerned widely in the market place

A simple and new effective electrochemical method was used prior to reverse osmosis for seawater desalination. The influences of three main factors in electrochemical methods—current density, operating time and sedimentation time on the efficiency of pretreatment—have been investigated. It was shown

The removal of particulate matter and dissolved organic matter from seawater by the use of biofiltration was investigated. Granular activated carbon (GAC) and anthracite were used as biofilter media at two different filtration velocities. Filtrate quality was measured in terms of silt density index

The intention of this paper is to to provide a general overview of the commercial and technical development of seawater reverse osmosis (SWRO) from the perspective of a manufacturer of spiral-wound reverse osmosis membranes. It illustrates the rapid rate of growth of the capacity of SWRO plants arou

Photovoltaic powered brackish water reverse osmosis (PV-BWRO) desalination systems have been proved to be a technically and economically mature choice for water supply in isolated communities and islands suffering from lack or poor water quality. However, photovoltaic seawater reverse osmosis (PV-SW

Pre-treatment of seawater feeding reverse osmosis (RO) membranes is a key step in designing desalination plants. The pre-treatment process must be adapted to the seawater quality to be treated (wells, open intake, etc.), especially when treating surface seawater with highly variable quality. After a

A special process control was required to cope with partial production during peak hours in order to take profit of lower electricity tariffs. The process control philosophy was based on separation of the system to independent subsequences with the purpose to achieve fully automatic start-up and nor

This paper describes the upgrade of a seawater reverse osmosis (SWRO) unit by replacing the hydraulic turbocharger energy-recovery system with a Dual Work-Exchanger Energy-Recovery (DWEER) system. Before the upgrade, the unit operated at a capacity of 1,071 m³/d, and a specific electricity of 3.00 k

The paper presents the latest developments and field experiences made with the large area, high rejection FilmTec** SW30HR-380 and SW30HR-320 membrane elements and focuses on technical-economical considerations with special emphasis on energy consumption and possible operational savings. Fouling in