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2 025 467

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C1

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IPC

(21) (22)

Application

5051540/02, 1992-07-06

(22)

Actual filing date

1992-07-06

(45)

Published

1994-12-30

(72)

Inventor

Gorshkov V.A.Frolova S.I.Bukharinova O.L.

(73)

Holder

Institut Ehkologii I Genetiki Mikroorganizmov Ural'Skogo Otdelenija Ran

PROCESS FOR PURIFYING CHROMIUM-CONTAINING SEWAGE Russian patent published in 1994 - IPC

Abstract RU 2025467 C1

FIELD: a process for purifying chromium-containing sewage. SUBSTANCE: the process comprises passing the sewage through a bed of iron-containing waste and treating it with a gas component. The sewage having a pH of 2.0-4.0 is passed with the metallic bed aerated with air at an hourly flow rate of 192 dm 192 dm3. The linear passage rate of chromium (VI) containing sewage is 1920-3460 mg hr 1920-3460 mg·h-1 per dm 1 dm3 of metallic waste. EFFECT: greater efficiency of the process. 2 cl, 1 tbl

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RU 2 025 467 C1

Authors

Gorshkov V.A.

Frolova S.I.

Bukharinova O.L.

Dates

1994-12-30—Published

1992-07-06—Filed

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