FIELD: sewage purification. SUBSTANCE: the invention presents a method and a system of the biological purification of household sewage by an active silt in suspension state used in detached separate small houses, cottages, farm-houses. The method of the sewage purification includes two phases of operation of the system, provides for the sewage feeding into an adjusting basin with the active silt and a starting gauge and consequent swapping of a raw water in the activation basin with biological loading and with the gauge cutting off activity of the system, the purified water running in the settler and from it - in the chamber with the porous filter, swappings of the silt and an air supply in the basins and chambers, a shut-down of the system operation and offtake of the purified water. At that they previously fill in with water the adjusting basin and the chamber with the porous filter for 50 %, and the activation basin and the chamber of stabilization of the silt - for 100 %. In the adjusting basin the working gauges of minimum and a maximum level of sewage are installed, and a daily operating time of the system is divided for intervals, fixed by the time r with in succession alternation of the first and the second phases of the system operation. At that switching from one phase to another is exercised either by the timer in case the sewage feeding sopped, or by the working gauges of minimum and a maximum level of sewage in the case of the mass sewage discharge within the intervals. At that during the first phase they exercise swapping of the raw water from the adjusting basin into the activation basin and an overflow of the purified water from it in the settler, and from it - in the chamber with the porous filter, and swapping of the purified water from it into the collector of this chamber, with following overflow from it into the basin - downpour, and in the second phase execute swapping of a raw water from the adjusting basin into the activation basin, pumping out the silt from the adjusting basin into a damper of the chamber of the silt stabilization, an overflow of the water with suspended silt from the chamber of stabilization of silt into the adjusting basin, swapping of the silt from the activation basin into the adjusting basin, swapping of water from the collector into the chamber with the porous filter, actuate operation of the macrobubbled aerator and an airlift of the settler, a contaminated water and foam exhaust from the porous filter chamber in the adjusting basin. At that productivity on the silt swapping from the activation basin is set much more, than productivity on the raw water swapping from the adjusting basin. The system for implementation of the method includes a body with a cover, in which the adjusting basin with the active silt, the starting gauge, the sewage inlet, the aerator, the pump in a tubular filter for swapping of the raw water in the activation basin supplied with biological loading, with the cutting off the system gauge, the pump for swapping of the silt and the settler, the chamber with the porous filter and with the pump for swapping of the purified water into the basin - downpour, the chamber of stabilization of the silt with a damper and the control unit. The adjusting basin is supplied with an additional macrobubbled aerator for breaking the coarse fractions, located under the tubular filter, the ground pump located in the tubular filter for pumping-down the waste silt into the damper of the chamber of stabilization of silt, the working gauges of minimum and a maximum level of the raw water. The chamber with the porous filter is additionally supplied with a cylindrical container, the upper open but of which is supplied with a perforated cover and is located above the level the porous filter, and the collector of the purified water, linked by water overflow with the basin-downpour and supplied with a pump for fast swapping of water from the collector into in the aeration chamber. Inside the cylindrical container there is a ump for swapping of water from it into adjusting basin. At that the pump for swapping of the purified water from the aeration chamber into the purified water collector is provided with the cap-type filters and the switch, that allows to switch on either the pump or an air supply into the chamber with the porous filter. This group of inventions ensures a high-quality purification of sewage so that the purified water is suitable for usage in agricultural needs. EFFECT: decrease of power consumption at an intensification of purification; the system is reliable in operation and less consuming-consuming at manufacturing. 2 cl, 2 dwg
