FIELD: waste water treatment. SUBSTANCE: waste waters produced in mechanical engineering and metalworking areas are averaged, neutralized by ferrochrome slime, and filtered for 1-2 min under reduced atmosphere 0.03-0.06 MPa or for 15-20 min under pressure 0.1-0.3 MPa through ferrochrome slime bed 0.3-0.5 mm thick. EFFECT: accelerated filtration and increased performance of filtration equipment. 4 dwg, 5 tbl, 2 ex
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