With water plant projects that produce millions of gallons of potable water per day, Seven Seas Water has an impressive track record of delivering abundant, safe and reliable fresh water to communities in water scarce regions. We are committed to solving water challenges with desalination water treatment solutions and producing dependable fresh water supplies.
Dissolved Air Flotation is a water treatment process which removes suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank or basin. The released air forms tiny bubbles, which adhere to the suspended matter causing the suspended matter to float to the surface of the water where it may then be removed by a skimming device. Dissolved air flotation is very widely used in treating the industrial wastewater effluents from oil refineries, petrochemical and chemical plants, natural gas processing plants, paper mills, general water treatment and similar industrial facilities.
Natural water contains dissolved impurities, which can impart a quality known as hardness. Hardness is determined by the concentration of multivalent cations in the water, with the most common being Ca2+ and Mg2+. The most common precipitation process used to remove harness when the raw water contains little or no noncarbonated hardness is lime softening. If a nominal amount of magnesium hardness is present, both lime and soda ash are necessary. When lime or soda ash is added, minerals form nearly insoluble precipitates, which are then removed by the conventional processes of flocculation, sedimentation, and filtration.
Multimedia filtration is a pressurized filtration process where water is filtered through three or more different media. The types of media used can include sand, anthracite, and garnet. This type of filtration can remove particles from 10-25 microns. They are typically operated at loading rates of 3-8 gpm/ft2. They must be backwashed periodically to remove the contaminants which become trapped in the media.
Seawater Reverse Osmosis and Brackish Water Reverse Osmosis are pressure-driven membrane processes. Hydraulic pressure is used to overcome the feed solution’s osmotic pressure and induces diffusion of pure water referred to as permeate, through a semi-permeable membrane. The solutes in the feed stream are concentrated during the process and leave the system as concentrated brine, also known as reject. These systems effectively remove all organic and inorganic constituents, including monovalent species. Seawater (SWRO) systems compared to brackish water (BWRO) systems are capable of more selective separation of water from other constituents in the feed stream due to higher pressures and smaller membrane pore sizes. Operating pressures for SWRO range from 750-1000 psi while BWRO ranges from 200-400 psi.
Our team of experts has designed, installed and operated reverse osmosis facilities around the world over the course of their careers, solving potable water challenges for municipal and private clients. From the largest desalination plant in the Western Hemisphere that supplies fresh water to the large population of Trinidad, to some of the top travel destinations in the world; our team has the deepest understanding of how to deliver a quality, dependable supply of fresh water.