JPS57144087A - Treatment of waste water containing nitrogen oxide - Google Patents
Treatment of waste water containing nitrogen oxideInfo
- Publication number
- JPS57144087A JPS57144087A JP2899181A JP2899181A JPS57144087A JP S57144087 A JPS57144087 A JP S57144087A JP 2899181 A JP2899181 A JP 2899181A JP 2899181 A JP2899181 A JP 2899181A JP S57144087 A JPS57144087 A JP S57144087A
- Authority
- JP
- Japan
- Prior art keywords
- waste water
- nitrogen oxide
- contg
- treatment
- water containing
- 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 perform treatment of waste water contg. nitrogen oxide easily by adding a reducing agent to said waste water then controlling its pH and liquid temp. and distillating the ammonia formed by reduction.
CONSTITUTION: A reducing agent, for example, Al or Zn, is added into waste water contg. nitrogen oxides contg. NO3 -, NO2 -. Thence, the pH of the soln. is controlled to ≥12 with a caustic alkali and the liquid temp. is maintained at about ≥50°C, whereby the NO3 - and NO2- in the waste water are reduced to NH3. Further, the formed NH3 is discharged to the outside of the system by blowing steam or nitrogen. An acid is added to the soln. removed of N obtd. in this way to control the same to the pH conforming to a water effluent standard. The formed precipitate is filtered out and the filtrate is discharged.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2899181A JPS57144087A (en) | 1981-02-27 | 1981-02-27 | Treatment of waste water containing nitrogen oxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2899181A JPS57144087A (en) | 1981-02-27 | 1981-02-27 | Treatment of waste water containing nitrogen oxide |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57144087A true JPS57144087A (en) | 1982-09-06 |
Family
ID=12263873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2899181A Pending JPS57144087A (en) | 1981-02-27 | 1981-02-27 | Treatment of waste water containing nitrogen oxide |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57144087A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002079102A1 (en) * | 2001-03-30 | 2002-10-10 | Kemira Chemicals Oy | Process for removal of nitrate from wastewater |
-
1981
- 1981-02-27 JP JP2899181A patent/JPS57144087A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002079102A1 (en) * | 2001-03-30 | 2002-10-10 | Kemira Chemicals Oy | Process for removal of nitrate from wastewater |
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