METHOD FOR WASTEWATER TREATMENT FOR WASTEWATER CONTAINING ALUMINUM, MAGNESIUM AND MANGANESE

Title:

METHOD FOR WASTEWATER TREATMENT FOR WASTEWATER CONTAINING ALUMINUM, MAGNESIUM AND MANGANESE

Document Type and Number:

WIPO Patent Application WO/2011/111407

Kind Code:

A1

Abstract:

Disclosed is a wastewater treatment method for selectively eliminating manganese from wastewater that is acidic due to sulfuric acid and contains aluminum, magnesium and manganese. The wastewater treatment method controls the precipitation of magnesium from wastewater that is acidic due to sulfuric acid and contains aluminum, magnesium and manganese and yields wastewater with the manganese removed through a process of adding acid or alkali to wastewater that is acidic due to sulfuric acid, adjusting the pH to 4.0-6.0 and separating the wastewater into a dealuminated liquid and aluminum deposits, a process that forms a slurry by adding a slurry solution to the aluminum deposits and next forms an aluminum deposit slurry after adjusting the pH to 9.0-9.5 by adding alkali, a process that adds alkali to the dealuminated liquid, adjusting the pH to 8.0-9.0 and next forms an oxidized and neutralized slurry by adding an oxidizing agent and a process of solid-liquid separation of the aluminum deposit slurry and oxidized/neutralized slurry.

Inventors:

KOBAYASHI HIROSHI (JP)
HIGAKI TATSUYA (JP)
SHOJI HIROFUMI (JP)
TOKI NORIHISA (JP)
KUDO KEIJI (JP)
MITSUI HIROYUKI (JP)
NAKAI OSAMU (JP)

Application Number:

PCT/JP2011/050112

Publication Date:

September 15, 2011

Filing Date:

January 06, 2011

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)
KOBAYASHI HIROSHI (JP)
HIGAKI TATSUYA (JP)
SHOJI HIROFUMI (JP)
TOKI NORIHISA (JP)
KUDO KEIJI (JP)
MITSUI HIROYUKI (JP)
NAKAI OSAMU (JP)

International Classes:

C02F1/64; C02F1/58; C02F1/72; C02F1/74; C02F1/78; C22B3/04; C22B3/44; C22B23/00; C22B21/00; C22B47/00

Foreign References:

JPH09512780A	1997-12-22
JPH0986925A	1997-03-31
JP2009011897A	2009-01-22
JP2005125316A	2005-05-19
JPH03225836A	1991-10-04

Other References: