JPS6418492A - Waste liquid treatment method - Google Patents
Waste liquid treatment methodInfo
- Publication number
- JPS6418492A JPS6418492A JP17628687A JP17628687A JPS6418492A JP S6418492 A JPS6418492 A JP S6418492A JP 17628687 A JP17628687 A JP 17628687A JP 17628687 A JP17628687 A JP 17628687A JP S6418492 A JPS6418492 A JP S6418492A
- Authority
- JP
- Japan
- Prior art keywords
- waste liquid
- zinc
- phosphate
- alkali metal
- sodium
- 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
- Removal Of Specific Substances (AREA)
Abstract
PURPOSE:To efficiently remove zinc particularly from the waste liquid containing zinc and ammonia by adding an alkali metal phosphate to zinc ion containing waste liquid and adjusting the pH of the waste liquid near the neutral value. CONSTITUTION:An alkali metal phosphate is added to zinc ion containing waste liquid such as acidic zinc plating waste liquid and also the pH of the waste liquid is adjusted near the neutral value, preferably to a value within 6.4-8.5, thereby forming and precipitating zinc phosphate. This precipitation is then removed therefrom by filtration or other methods to remove zinc from the waste liquid. As the alkali metal phosphate, the sodium or potassium salt of an phosphoric acid, e.g. sodium dihydrogen phosphate, sodium monohydrogen phosphate, potassium dihydrogen phosphate and potassium monohydrogen phosphate, may be used.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17628687A JPS6418492A (en) | 1987-07-15 | 1987-07-15 | Waste liquid treatment method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17628687A JPS6418492A (en) | 1987-07-15 | 1987-07-15 | Waste liquid treatment method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6418492A true JPS6418492A (en) | 1989-01-23 |
JPH0344839B2 JPH0344839B2 (en) | 1991-07-09 |
Family
ID=16010928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17628687A Granted JPS6418492A (en) | 1987-07-15 | 1987-07-15 | Waste liquid treatment method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6418492A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5817864B2 (en) | 2014-02-20 | 2015-11-18 | 栗田工業株式会社 | Method and apparatus for treating ammonia-containing water |
-
1987
- 1987-07-15 JP JP17628687A patent/JPS6418492A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0344839B2 (en) | 1991-07-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |