JPS56118788A - Disposal of waste solution - Google Patents
Disposal of waste solutionInfo
- Publication number
- JPS56118788A JPS56118788A JP2321680A JP2321680A JPS56118788A JP S56118788 A JPS56118788 A JP S56118788A JP 2321680 A JP2321680 A JP 2321680A JP 2321680 A JP2321680 A JP 2321680A JP S56118788 A JPS56118788 A JP S56118788A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- waste
- neutralization
- concentration
- waste solution
- 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
Landscapes
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
PURPOSE: To decontaminate a waste solution, even of a high concentration, which was discharged in a steel industry and used as a cleaning solution or the like in a degreasing step, a rust-removing step or the like, by effectively separating contaminants from the waste solution by reactions such as oxidation, decomposition, adsorption, neutralization, etc.
CONSTITUTION: Waste solutions from an acid pickling step or a cleaning step are generally classified to a solution of a lower concentration and a solution of a higher concentration. These waste solution contain sodium silicate, surfactants, polybasic acids, zinc phosphate, oils, fats, metal ions, etc. In disposing these solutions, the neutralization with an alkali is sufficient as for the solution of a lower concentration, but the addition of a chlorine-based oxidant to oxidize ferrous ions to a trivalent state is necessary as for the solution of a higher concentration. An alkaline reagent is added to the oxidized solution to neutralize it. The alkaline reagent is calcium hydroxide capable of forming insoluble salts by the neutralization reaction. Thereafter, the precipitates are separated from the solution.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2321680A JPS56118788A (en) | 1980-02-25 | 1980-02-25 | Disposal of waste solution |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2321680A JPS56118788A (en) | 1980-02-25 | 1980-02-25 | Disposal of waste solution |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56118788A true JPS56118788A (en) | 1981-09-17 |
Family
ID=12104457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2321680A Pending JPS56118788A (en) | 1980-02-25 | 1980-02-25 | Disposal of waste solution |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56118788A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
1980
- 1980-02-25 JP JP2321680A patent/JPS56118788A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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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