초록 ▼

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 us

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.

대표청구항 ▼

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 ve

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.