METHOD OF CLEANING WASTE WATER FROM DYES AND/OR ORGANIC SUBSTANCE CONTAINING SULFONIC GROUPS Russian patent published in 1997 - IPC

Abstract RU 2083509 C1

FIELD: waste water purification. SUBSTANCE: invention relates to cleaning waste water from dyes and/or organic substance containing sulfonic groups and metal ions. Task is achieved by treating waste water at pH 9.5-11.5 with water-soluble salt of bi- or trivalent metal in weight proportion from 4: 1 to 15: 1, whereupon pH value is adjusted to 6.5-8.5 followed by mechanical cleaning and ultrafiltration separation. Method ensures intensification and increasing quality of cleaning waste water and also return of permeate from ultrafiltration separation into production process. EFFECT: enhanced efficiency of cleaning.

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RU 2 083 509 C1

Authors

Osadchij Jurij Pavlovich

Afanas'Eva Ekaterina Nikolaevna

Dates

1997-07-10—Published

1993-01-11—Filed