METHOD OF PURIFYING SEWAGE AGAINST CHROMIUM Russian patent published in 1994 - IPC

Abstract RU 2006484 C1

FIELD: sewage purifying. SUBSTANCE: sewage is treated by composition which contains, mass % : ferrum (11) sulfate 21.9-32.6 aluminium sulfate 11.0-16.3, sodium hydrocarbonate 21.9-32.6, starch 1.4-2.0, clay the rest. Molar ratio Fe (II): Cr(VI) is (2.80-3.40): 1, pH being 6.6-7.5. Precipitate is separated is separated by settling or by filtration. Residual chromium content in sewage is 0.01 mg/l. EFFECT: improves efficiency of the method. 1 tbl

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RU 2 006 484 C1

Authors

Kublanovskij V.S.

Litovchenko K.I.

Nikitenko V.N.

Gerasimova O.O.

Kislinskaja G.E.

Dates

1994-01-30—Published

1991-04-23—Filed