FIELD: purification of sewage water. SUBSTANCE: unit has conveyer in the form of endless belt formed by links made of flat catching hooks located along axis and forming a grate. Water wheel with mechanism of its immersion is installed above conveyer flight. Lower part of conveyer and motor in the form of water wheel are immersed into channel where sewage water flows. Water flow rotates blades of water wheel which transmits motion to unit mechanisms. Immersion mechanism is telescopic. Said unit is applicable in removal of coarse-dispersion impurities from sewage water at sewage purification works. EFFECT: economically efficient, safe and reliable in operation, and simple in design. 2 cl, 1 dwg
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