GEAR TO TREAT DOMESTIC SEWAGE Russian patent published in 1998 - IPC

FIELD: purification of domestic sewage of separately located objects in sparsely populated areas and of individual houses, storage and utilization of purified water. SUBSTANCE: gear incorporates filter-averager 2, underground anaerobic biofilter 7, surface inclined soil-and-vegetation filter 4 divided into sectors, trench 5 with aqueous vegetation located at base of slope banked up on side opposite to slope and underground drain canal 6 connecting trench with anaerobic filter directly under slope. All these units are arranged with space- saving with due account of maximum efficiency of water treatment and temperature condition of gear. Quality conditioning of water is envisaged in filter-averager and in underground biofilter. Space 8 inside anaerobic filter as well as trenches with aqueous vegetation are used to collect water. Temperature condition of gear is maintained at specified level with the aid of heat exchanger 1 brought into poorly filtering base of soil-and-vegetation filter. Efficiency of biological purification of water is achieved thanks to complex physical, chemical and biological processes taking place in soil and water phase. EFFECT: improved efficiency of biological purification. 4 cl, 1 dwg