FIELD: treatment of sewage; biochemical cleaning and aftercleaning of domestic and industrial sewage. SUBSTANCE: device includes inlet unit, passages formed by berms and set of screens with floating water plants. Transversal dikes are perpendicular relative to water flow and are sunken to 0.5 - 0.7 m. Water and air plants are found on these dikes; their roots are sunken in water and their stalks are rigid. Dikes interchange with rows of floating carrier screens. EFFECT: enhanced efficiency. 2 dwg, 1 tbl, 1 ex
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