Device for filtering grey water from households

摘要

The device comprises a watertight tank (1) provided with vertical walls (2) comprising an input (4) of gray water to be filtered and an output of the filtered gray water. The tank comprises multiple superimposed layers of filtering media of decreasing size in a direction of gray water flow. The layers of filtering media are placed in cartridges removably mounted in the tank. Each cartridge comprises a filtration chamber (6) that is delimited by vertical or inclined side walls and two opposite open faces, and presents a truncated form to allow a cyclonic flow of gray water in the cartridges. The device comprises a watertight tank (1) provided with vertical walls (2) comprising an input (4) of gray water to be filtered arranged in its higher part and an output of the filtered gray water arranged in its lower part. The tank comprises multiple superimposed layers of filtering media of decreasing size in a direction of gray water flow. The layers of filtering media are placed in cartridges removably mounted in the tank. The cartridges are superimposed one above the other. The movement of greywater is downward from the cartridge located above the cartridge located in a lowest position. Each cartridge comprises a filtration chamber (6) inside which the layers of filtering media are contained. The filtration chamber is delimited by vertical or inclined side walls and two opposite open faces, where each one of the opposite open faces is provided with a grid authorizing the gray water flow. The filtration chamber presents a truncated form to allow a cyclonic flow of gray water in the cartridges. The tank is provided with a pulsated air intake (21) arranged in its low part to accentuate the cyclonic effect. Each cartridge is mounted in sealed sliding rails arranged inside the tank. The tank contains the three removable and superimposed cartridges arranged in the direction of gray water flow. The first cartridge has a coarse granulometry of 25-40 mm. The cartridge has an average granulometry of 10-25 mm. The third cartridge has a fine granulometry of 0.5-10 mm. The input is equipped with a pipe leading in the higher part of the tank and having an end upstream to be connected to a storage reservoir of gray water to be filtered and a downstream end equipped with tubes configured to distribute the gray water to an upper surface of the first cartridge in a homogeneous manner. The tank integrates a vat for collecting the filtered gray water. The vat is present in communication with a control unit equipping the output and connected to a pumping system to evacuate the filtered gray water. The tank is equipped with a grid placed in the vat and configured to retain the suspended particles having a size of 300-500 microns. An independent claim is included for an installation for noncollective treatment of the domestic gray water its later use.