US 4,946,600 A · Water repurification method of city water and its equipment

Abstract

A method of repurifying water from a public supply, comprising the steps of: taking water to be repurified continuously from the public supply; filtering the water slowly through a volume of particulate material; and accumulating the filtered water to provide a store of repurified water for later use as and when required. According to a second aspect of the present invention, there is provided an apparatus for repurifying water from a public supply, comprising: a water inlet adapted for connection to the public supply and operable to take a continuous flow of water from the supply; a filer comprising a volume of particulate filter material and arranged to receive the water from the water inlet; a container arranged to receive filtered water therefrom and to store the filtered water; and a water outlet connected to the container and operable to draw off filtered water as and when required.

Claims17

Dependent claims

A method for purifying water from a public supply which has been treated with chlorine to kill bacteria, said water containing oxidizing agents and solid impurities, comprising the steps of:

taking the water to be purified continuously from the public supply;
leading the water through piping to a vertical tube into which the water flows so that the water in said tube has a free water surface subject to air pressure;
leading the water from the bottom of said vertical tube to a settling zone of a filter basin;
filtering the water in said filter basin by using water pressure from water in said transparent vertical tube to slowly force the water from said settling zone upwards through a particulate filter material having voids, chlorine in the water being oxidized in said voids by said oxidizing agents and said solid impurities being retained in said particulate material;
leading the water from said filter basin to a water storage basin located above said filter basin;
storing the filtered water in said water storage basin;
and
draining overflow water from the top of said water storage basin when there is more than a given amount of water in said water storage basin.

5 more elements

Dependencies are inferred from the claim text.

Water repurification method of city water and its equipment

Life of this patent

Water repurification method of city water and its equipment

Life of this patent

Abstract

Claims17