SEPTIC TANK Russian patent published in 2023 - IPC E03F1/00 C02F3/06 

FIELD: treatment facilities.

SUBSTANCE: septic tank contains a vertical discharge well (1) and a main well (3) with an inlet pipe (5) located on the ceiling (2) on the discharge well. The main well (3) is closed from above with a cover (4). The drain hole from the main well to the discharge well is made in the cover (6) that closes the hatch at the bottom of the main well. The hatch is made at the maximum distance from the inlet pipe (5) in the direction of wastewater flow in the main well. In the cover (6) of the manhole, there is a hole for mounting a coarse filter to it configured to communicate through the said filter of the main well (3) with the discharge well (1) and ensure the filtration of sewage and sewage waters before they are discharged into the discharge well (1). The coarse filter comprises a housing (8) plugged from below, a bypass perforated pipe (10) mounted in the housing, communicating the main well (3) with the discharge well (1) through the hole in the upper part of the filter housing (8), the hole at the bottom of the filter housing and hole in the cover (6) of the hatch. On the surface of the bypass pipe (10), over the perforation (11), a filter material (12) is mounted so that it is adapted to pass into the discharge well (1) for the water filtered from impurities using the filter material. The bypass pipe is detachably mounted into the hole on the bottom of the filter housing (8) and can be extracted from the said hole for replacement of the filter material (12). Inside the filter housing (8), between its side wall and the filter material (12), an indicator valve (7) is mounted in the second hole on the bottom of the filter housing, made in the form of a perforated pipe plugged from below, inside which there is a rod made of a material with positive buoyancy, which, as it fills with water, when the filter material (12) of the internal volume of the filter housing (8) is contaminated, rises and visually signals the degree of filling of the internal volume of the filter housing. The indicator valve (7) is detachably mounted into the hole at the bottom of the filter housing (8) and can be extracted from the said hole and drain water from the volume of the filter housing (8) into the main well (3).

EFFECT: increased life of the septic tank.

7 cl, 1 dwg