FIELD: chemistry.
SUBSTANCE: invention relates to field of waste water purification in a device with filtering medium, which has sucking in tube system. Filtering medium can represent medium from walnut shell.
EFFECT: reduction of amount of washing water, formed during countercurrent washing of filtering installation with walnut shell, and reduction of quantity of dead zones, which do not contact with washing flowing medium.
16 cl, 10 dwg, 2 tbl, 4 ex
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