JPS5738986A - Treatment of waste water - Google Patents
Treatment of waste waterInfo
- Publication number
- JPS5738986A JPS5738986A JP11265480A JP11265480A JPS5738986A JP S5738986 A JPS5738986 A JP S5738986A JP 11265480 A JP11265480 A JP 11265480A JP 11265480 A JP11265480 A JP 11265480A JP S5738986 A JPS5738986 A JP S5738986A
- Authority
- JP
- Japan
- Prior art keywords
- waste water
- tank
- soln
- chromium
- ferrous sulfate
- 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 the hexavalents chromium concn. in waste water by adding a prescribed amount of a ferrous sulfate soln. to the suction side of a feed pump for strong alkaline waste water contg. hexavalents chromium then blowing gaseous carbon dioxide.
CONSTITUTION: A prescribed amount of ferrous sulfate soln. is added from a soln. tank 6 to the suction side of a feed pump 2 through a feed pipe 10. If the ferrous sulfate soln. is thoroughly mixed with the waste water in a waste water tank 1, and the mixture is supplied together with the waste water into a neutralizing tank 3, the harmful hexavalent chromium containing in the waste water is mostly reduced to harmless trivalent chromium. At the same time, pH of the waste water in the tank 3 is adjusted by the gaseous carbon dioxide blown therein. The waste water of decreased hexavalent chromium concn. is discharged into a settling tank 4. The feed amount of the ferrous sulfacte soln. is regulated by a meter 7 and a flow rate regulating cock 9.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11265480A JPS5738986A (en) | 1980-08-18 | 1980-08-18 | Treatment of waste water |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11265480A JPS5738986A (en) | 1980-08-18 | 1980-08-18 | Treatment of waste water |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5738986A true JPS5738986A (en) | 1982-03-03 |
Family
ID=14592131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11265480A Pending JPS5738986A (en) | 1980-08-18 | 1980-08-18 | Treatment of waste water |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5738986A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59199097A (en) * | 1983-04-28 | 1984-11-12 | Nippon Chem Ind Co Ltd:The | Disposal of waste cement slurry |
-
1980
- 1980-08-18 JP JP11265480A patent/JPS5738986A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59199097A (en) * | 1983-04-28 | 1984-11-12 | Nippon Chem Ind Co Ltd:The | Disposal of waste cement slurry |
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