FIELD: sewage water treatment. SUBSTANCE: submerged carrier has a favorable buoyancy. The carrier frame is made from parallel plates with rods fixed between them. Bed members have the form of foam plastic sheets 1-2 cm thick and 3-10 cm long and wide. The members are strung on the rods. EFFECT: higher efficiency and lower cost due to using foam plastic sheets. 1 dwg, 1 tbl
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