FIELD: chemistry, water purification.
SUBSTANCE: invention refers to biological sewage treatment with activated sludge, and is applied as local treatment facilities in cottages, detached buildings or groups of buildings, drive-up public catering establishments. Invention concerns biological sewage treatment system containing integrated units: sewage receiver, denitrifier, aeration tank with aerator, secondary sedimentation tank, and sludge regenerator. Herewith secondary sedimentation tank is separated from aeration tank with vertical wall and inclined bottom; between inclined bottom and vertical wall of the case there is a gap formed; bottom part of aeration tank contains small bubbling aerator between bottom end of sludge regenerator and the gap.
EFFECT: easy-to-operate, reliable, durable and large-scale producible system.
2 dwg
