Methods for desalinating sea water to produce fresh water include making sea water acid to transform salts to solids filtration and sedimentation reverse osmosis and solar evaporation/collection of water treating sea water with salt-consuming marine bacteria treating with activated charcoal and clay

Seawater is denser than both fresh water and pure water(density 1.0 kg/L at 4 °C (39 °F)) because the dissolved salts increase the mass by a larger proportion than the volume.

reverse osmosis and solar evaporation

Explanation:

Reverse osmosis is a way to desalinate seawater, to do this in summary the seawater is placed in a cylinder and through a semipermeable membrane and thanks to the application of pressure on the salt water solution. This pressing  makes the water pass through the semipermeable membrane whose function is to allow the passage of water, but not the solute that are dissolved sales. Water passes through the membrane, from the side where the sales concentration is higher towards the side where the sales concentration is lower.

Direct solar desalination technology can process up to 10,000 meters. cubic of water a day. The heat from the sun evaporates the water, the purified steam is collected and recovered again in its liquid form.

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