JPS5531439A - Treatment of incinerated ash containing chromium - Google Patents
Treatment of incinerated ash containing chromiumInfo
- Publication number
- JPS5531439A JPS5531439A JP10451278A JP10451278A JPS5531439A JP S5531439 A JPS5531439 A JP S5531439A JP 10451278 A JP10451278 A JP 10451278A JP 10451278 A JP10451278 A JP 10451278A JP S5531439 A JPS5531439 A JP S5531439A
- Authority
- JP
- Japan
- Prior art keywords
- ashes
- hexavalent
- amount
- neutralization
- reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
PURPOSE: To convert incinerated ashes to harmless products 1 inexpensively by cooling the incinerated ashes containing hexavalent chrominum and free alkali and carrying out the reduction and the neutralization of the ashes in a predetermined amount of a mixed solution containing ferrous sulfate and sulfuric acid at a predetermined concentration.
CONSTITUTION: After cooling incinerated ashes containing hexavalent chrominm and Na salt, an aqueous solution containing ferrous sulfate at a concentration of 0.5 to 5% and sulfuric acid at a concentration of 2 to 10%, is spray-added to the ashes. Ferrous sulfate is used in an amount ranging 3 to 4 times the equivalent amount of hexavalent chronium and sulfuric acid is used in an amount of at least 1.5 times preferably ranging 2 to 3 times the equivalent amount of free alkali. The incinerated ashes are reduced at a temperature of 70 to 90°C for one to two hours to complete the neutralization, whereby hexavalent chromium is reduced to harmless trivalent chromium. A treating tank having a large capacity and a dehydrator used in prior arts are not necessary and the cost of equipment and the expense of operation can be reduced. This process is characterized by that the reduction and the neutralization are carried out simultaneously. Otherwise, the reduction does not proceed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53104512A JPS6044991B2 (en) | 1978-08-28 | 1978-08-28 | Processing method for incineration ash containing chromium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53104512A JPS6044991B2 (en) | 1978-08-28 | 1978-08-28 | Processing method for incineration ash containing chromium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5531439A true JPS5531439A (en) | 1980-03-05 |
JPS6044991B2 JPS6044991B2 (en) | 1985-10-07 |
Family
ID=14382538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53104512A Expired JPS6044991B2 (en) | 1978-08-28 | 1978-08-28 | Processing method for incineration ash containing chromium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6044991B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56128036A (en) * | 1980-03-11 | 1981-10-07 | Nec Corp | Two-way amplifier of two-wire type |
ITVE20090034A1 (en) * | 2009-07-09 | 2011-01-10 | Veneta Depuratori E Affini S Ve D A Soc | PROCEDURE FOR TREATING ASHES OBTAINED IN WASTE INCINERATION PLANTS.- |
ITTV20120029A1 (en) * | 2012-02-27 | 2013-08-28 | C S R S R L Ct Sviluppo Ricer Che | METHOD AND PLANT FOR WASTE TREATMENT |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103272535B (en) * | 2012-09-29 | 2015-07-08 | 温州大学 | Method for treating leather making sludge by using load type initiator |
-
1978
- 1978-08-28 JP JP53104512A patent/JPS6044991B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56128036A (en) * | 1980-03-11 | 1981-10-07 | Nec Corp | Two-way amplifier of two-wire type |
JPS6213858B2 (en) * | 1980-03-11 | 1987-03-30 | Nippon Denki Kk | |
ITVE20090034A1 (en) * | 2009-07-09 | 2011-01-10 | Veneta Depuratori E Affini S Ve D A Soc | PROCEDURE FOR TREATING ASHES OBTAINED IN WASTE INCINERATION PLANTS.- |
ITTV20120029A1 (en) * | 2012-02-27 | 2013-08-28 | C S R S R L Ct Sviluppo Ricer Che | METHOD AND PLANT FOR WASTE TREATMENT |
Also Published As
Publication number | Publication date |
---|---|
JPS6044991B2 (en) | 1985-10-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5272368A (en) | Continuous treatment of polluted soil | |
JPS5531439A (en) | Treatment of incinerated ash containing chromium | |
JPS5531437A (en) | Removal of arsenic and silicic acid present in industrial waste water | |
JPS571446A (en) | Decomposition of ion exchange resin | |
JPS5631424A (en) | Treatment of malodorous gas | |
JPS56161881A (en) | Caking of pulverized waste | |
JPS5637089A (en) | Treating method for water | |
JPS53108877A (en) | Treating method for neutralization and solid-ification of waste sulfuric acid | |
JPS5561925A (en) | Scrubbing treatment of exhaust gas containing heavy metal | |
JPS5584522A (en) | Simultaneous desulfurization and denitration of waste gas | |
JPS5244770A (en) | Method of treating gas purifying composition | |
JPS5615883A (en) | Drying and incinerating treatment of solid or liquid waste material containing chromium | |
JPS53113264A (en) | Method of treating waste acid | |
JPS55104692A (en) | Purifying treatment of fluorine-containing waste water | |
JPS591800B2 (en) | Processing method for electrolytic processing fluid | |
JPS5779107A (en) | Method for utilizing sludge for neutralization of waste fluoronitric acid | |
JPS5663000A (en) | Chromic acid reduction processing method | |
JPS52113566A (en) | Method of recoverying phosphorous contents from active sludge | |
JPS52126061A (en) | Process for treating waste water of chromium plating purification | |
JPS5624084A (en) | Antipollution treatment of steel making dust | |
JPS5541851A (en) | Decreasing nitrogen and sulfur compound and cod in waste water | |
JPS5498704A (en) | Preparation of alcohols | |
JPS52152655A (en) | Process for treating waste water containing heavy metals | |
Dimtschev | Purification of Waste Waters From Sulphuric Acid Pickles for Ferrous Metals | |
JPS5547226A (en) | Treating method for aged mixed solution of chromic acid and sulfuric acid |