FIELD: cleaning waste water through filtration. SUBSTANCE: filtering device includes well whose lower portion is engageable with exit for discharge of filtrate and waste filtering material, hopper with meter for dosed delivery of grainy filtering material to well, cleaned liquid supply branch pipe and vibrating platforms for discharge of waste filtering material. EFFECT: enhanced efficiency. 3 cl, 7 dwg
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Authors
Dates
1997-10-10—Published
1995-07-04—Filed