JPS5541851A - Decreasing nitrogen and sulfur compound and cod in waste water - Google Patents
Decreasing nitrogen and sulfur compound and cod in waste waterInfo
- Publication number
- JPS5541851A JPS5541851A JP11493678A JP11493678A JPS5541851A JP S5541851 A JPS5541851 A JP S5541851A JP 11493678 A JP11493678 A JP 11493678A JP 11493678 A JP11493678 A JP 11493678A JP S5541851 A JPS5541851 A JP S5541851A
- Authority
- JP
- Japan
- Prior art keywords
- waste water
- nitrogen compounds
- sulfur
- cod
- nitrite ions
- 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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
PURPOSE: To simultaneously decrease sulfur and nitrogen compounds as well as COD in waste water, by treating waste water containing sulfur and nitrogen compounds at high temperatures in acidic zone in the presence of nitrite ions.
CONSTITUTION: Waste water containing sulfur and nitrogen compounds discharged from wet type waste gas denitrification and desulfurization equipments or the like is heat treated at high temperatures above 60°C, preferably above 80°C at an acidic zone below pH4, preferably below pH3, in the presence of nitrite ions by adding aqueous potassium nitrite solution or nitrous acid gas or the like. The process hydrolyzes sulfur and nitrogen compounds in waste water and the hydrolyzed products react with nitrite ions, thereby decreasing sulfur and nitrogen compounds in the waste water. At the same time, COD in the water decreases.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53114936A JPS5812078B2 (en) | 1978-09-18 | 1978-09-18 | Method for reducing sulfur-containing nitrogen compounds and COD in wastewater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53114936A JPS5812078B2 (en) | 1978-09-18 | 1978-09-18 | Method for reducing sulfur-containing nitrogen compounds and COD in wastewater |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5541851A true JPS5541851A (en) | 1980-03-24 |
JPS5812078B2 JPS5812078B2 (en) | 1983-03-05 |
Family
ID=14650317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53114936A Expired JPS5812078B2 (en) | 1978-09-18 | 1978-09-18 | Method for reducing sulfur-containing nitrogen compounds and COD in wastewater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5812078B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5950924A (en) * | 1982-09-14 | 1984-03-24 | Seiko Instr & Electronics Ltd | Manufacture of press part |
WO2008038089A2 (en) * | 2006-09-25 | 2008-04-03 | Dong Energy Power A/S | Method for purification of wastewater containing sulphur and nitrogen containing compounds |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5165078A (en) * | 1974-12-04 | 1976-06-05 | Kureha Chemical Ind Co Ltd | CHITSUSOSANKABUTSUNO MUGAIKAHOHO |
JPS5176854A (en) * | 1974-12-26 | 1976-07-03 | Taoka Chemical Co Ltd | HAIEKINOYOSOSHOHIRYOTEIGENHOHO |
-
1978
- 1978-09-18 JP JP53114936A patent/JPS5812078B2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5165078A (en) * | 1974-12-04 | 1976-06-05 | Kureha Chemical Ind Co Ltd | CHITSUSOSANKABUTSUNO MUGAIKAHOHO |
JPS5176854A (en) * | 1974-12-26 | 1976-07-03 | Taoka Chemical Co Ltd | HAIEKINOYOSOSHOHIRYOTEIGENHOHO |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5950924A (en) * | 1982-09-14 | 1984-03-24 | Seiko Instr & Electronics Ltd | Manufacture of press part |
JPH0241377B2 (en) * | 1982-09-14 | 1990-09-17 | ||
WO2008038089A2 (en) * | 2006-09-25 | 2008-04-03 | Dong Energy Power A/S | Method for purification of wastewater containing sulphur and nitrogen containing compounds |
WO2008038089A3 (en) * | 2006-09-25 | 2008-06-12 | Dong Energy Generation | Method for purification of wastewater containing sulphur and nitrogen containing compounds |
Also Published As
Publication number | Publication date |
---|---|
JPS5812078B2 (en) | 1983-03-05 |
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