JPS56152797A - Treatment of pickling waste liquor - Google Patents
Treatment of pickling waste liquorInfo
- Publication number
- JPS56152797A JPS56152797A JP5636080A JP5636080A JPS56152797A JP S56152797 A JPS56152797 A JP S56152797A JP 5636080 A JP5636080 A JP 5636080A JP 5636080 A JP5636080 A JP 5636080A JP S56152797 A JPS56152797 A JP S56152797A
- Authority
- JP
- Japan
- Prior art keywords
- heavy metals
- waste liquor
- added
- insoluble
- cod
- 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.)
- Pending
Links
Abstract
PURPOSE: To reduce COD and make heavy metals insoluble to remove said metals by adding hydrogen peroxide and a solution of ferrous sulfate to the pickling waste liquor containing an inhibitor, copper ion sequestering agent and heavy metals, while controlling the pH.
CONSTITUTION: To the pickling waste liquor wich washes the piping of a boiler, heat exchanger, etc., and contains an inhibitor, copper ion sequestering agent, and heavy metals such as iron and copper, alkali is added firstly to adjust about 7.2W 7.5pH, which is weak alkaline. Then, hydrogen peroxide generating oxygen corresponding to the COD value of the waste liquor is added. Next, caustic alkali is added to adjust about ≥10pH and the solu. of ferrous sulfate is rapidly mixed to make the heavy metals insoluble, thereby settling the heavy metals. Thus, the heavy metals are treated by being made insoluble after COD is decreased by using iron ion in the waste liquor.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5636080A JPS56152797A (en) | 1980-04-30 | 1980-04-30 | Treatment of pickling waste liquor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5636080A JPS56152797A (en) | 1980-04-30 | 1980-04-30 | Treatment of pickling waste liquor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56152797A true JPS56152797A (en) | 1981-11-26 |
Family
ID=13025070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5636080A Pending JPS56152797A (en) | 1980-04-30 | 1980-04-30 | Treatment of pickling waste liquor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56152797A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040008342A (en) * | 2002-07-18 | 2004-01-31 | 한국전력공사 | Method for recycling the waste water producing by chemical cleaning in industrial boiler |
JP2017000932A (en) * | 2015-06-08 | 2017-01-05 | 栗田エンジニアリング株式会社 | Processing method of waste water |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5030359A (en) * | 1973-07-10 | 1975-03-26 |
-
1980
- 1980-04-30 JP JP5636080A patent/JPS56152797A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5030359A (en) * | 1973-07-10 | 1975-03-26 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040008342A (en) * | 2002-07-18 | 2004-01-31 | 한국전력공사 | Method for recycling the waste water producing by chemical cleaning in industrial boiler |
JP2017000932A (en) * | 2015-06-08 | 2017-01-05 | 栗田エンジニアリング株式会社 | Processing method of waste water |
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