JPS5738986A - Treatment of waste water - Google Patents

Treatment of waste water

Info

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
Application number
JP11265480A
Other languages
Japanese (ja)
Inventor
Akio Oba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NIPPON CHIYUUTETSUKAN KK
Original Assignee
NIPPON CHIYUUTETSUKAN KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NIPPON CHIYUUTETSUKAN KK filed Critical NIPPON CHIYUUTETSUKAN KK
Priority to JP11265480A priority Critical patent/JPS5738986A/en
Publication of JPS5738986A publication Critical patent/JPS5738986A/en
Pending legal-status Critical Current

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
JP11265480A 1980-08-18 1980-08-18 Treatment of waste water Pending JPS5738986A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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