Aeration of sea water
A serious environmental problem in the Baltic sea are the so called “dead bottoms”. Eutrophication causes excessive algal blooms, and as these algae die, they decompose on the sea floor. The decomposition requires oxygen and the result is a lack of oxygen that affects the marine biology negatively.
This section is split into the following subcategories: Aeration in bays, Aeration in lakes, Aeration in the ocean, Aeration with removal of algae, Wave or tide powered, Chemical or electrically powered, Sun or wind powered
Several ways of pumping air or oxygen-rich water to the bottom are proposed in the patent literature.
A system for sea water oxygen restoration. By means of a pump and two water tanks, compressed air is collected in a pressure tank. Air in the pressure tank may be pressed down to depths of 1500 meters below the sea surface. The pump may be powered by a wind mill.
Aerator for sea water, comprising an anchored floating pontoon with a sloping platform, a water tank and a outlet pipe. Due to the action of sea waves, oxygen-rich water at the surface will travel up the platform and accumulate in the tank. The oxygen-rich water in the tank will descend down the outlet pipe to the oxygen-depleted sea bottom.
Tidal powered aerator. A so called venturi tube is located at the bottom. The narrow section of the venturi tube has an air pipe connected to the atmosphere. At tide, water flows through the venturi tube. Because of the “venturi effect”, the pressure will be reduced in the narrow section. As a result, air will be sucked from the atmosphere through the air pipe and into the water.