Patent FR-2990428-A1 (FR)
Title: Installation, used to treat e.g. gray waste water obtained from buildings, comprises water tank with inner walls for forming four chambers, and lid to seal tank in which lid is provided with inspection pit to provide access to chambers
Inventor: BOUTELIGIER RAF
IPC: C02F9/14
Filed: 2013-05-10
Abstract: The installation comprises: a water tank (2) comprising inner walls (3, 4) for forming four chambers (10, 20, 30, 40) in the volume of the tank, where each chamber has a maximum average volume of 25% of the volume of the tank; and a lid (5) to seal the water tank, in which the lid is provided with an inspection pit to provide access to the chambers. The first chamber is intended to collect and transmit gray waste water and includes an input (11) and an output. The second chamber is intended to collect and accumulate the water of the first chamber and includes an input and an output. The installation comprises: a water tank (2) comprising inner walls (3, 4) for forming four chambers (10, 20, 30, 40) in the volume of the water tank, where each chamber has a maximum average volume of 25% of the volume of the water tank; and a lid (5) to seal the water tank, in which the lid is provided with an inspection pit to provide access to the chambers. The first chamber is intended to collect and transmit gray waste water and provided with an input (11) and an output. The second chamber is intended to collect and accumulate the water of the first chamber and provided with an input and an output. The third chamber is provided for the treatment of water in a biological manner and provided with an input and an output. The fourth chamber is intended to collect the water running out of the third chamber and is provided with an input and an output. The installation further comprises: a first unit for connecting the output of the first chamber to the input of the second chamber in order to transfer the water of the first chamber towards the second chamber when a water level in the first chamber is above a maximum water level in the first chamber that is less than 2 cm below the input of the first chamber and/or when the water level in the second chamber is below a maximum water level in the second chamber that is less than 2 cm below the input and/or the input of the first and second chamber and/or when the water level in the first chamber is above a minimal water level that is less than 20 cm below the maximum water level in the first chamber and/or less than 10 cm above the maximum level of storage of muds in the first chamber; a second unit for connecting the output of the third chamber to the input of the fourth chamber to transfer the water of third chamber towards the fourth chamber when the water level in the third chamber is above a maximum water level in the third chamber that is less than 2 cm below the input of the third chamber; a pump system to transfer a certain volume of water of the second chamber towards the third chamber; a third unit to transfer the water towards the first chamber when the water level in the first chamber is lower than a level of maximum water given in the first chamber and/or the water level in the second chamber is lower than the level of maximum water given in the second chamber, and to transfer the water towards the second chamber when the water level in the first chamber is higher than the level of water maximum in the first chamber and/or the water flow is higher than a given water flow and when the water level in the second chamber does not exceed the level of maximum water in the second chamber, and/or to transfer the water towards the output of the second chamber when the water level in the second chamber is higher than the level of maximum water in the second chamber and/or the water flow is higher than a given water flow; and a second pump system to transfer muds from the fourth chamber towards the first chamber. The output of the second chamber is located at a level that is below the input of the first chamber. The third unit includes a connection element that connects the input of the first chamber to the output of the second chamber and is provided with three elements to transfer the water towards the first chamber when the water level in the first chamber is lower than the maximum water level in the first chamber and/or the water level in the second chamber is lower than the maximum water level in the second chamber, and to transfer the water towards the second chamber or towards the output of the second chamber when the water level in the first chamber is higher than the level of maximum water and/or the water flow at the input of the first chamber is higher than the given water flow. An independent claim is included for a method for treating a gray waste water.