JPS5753289A - Advanced treatment of night soil - Google Patents
Advanced treatment of night soilInfo
- Publication number
- JPS5753289A JPS5753289A JP12841080A JP12841080A JPS5753289A JP S5753289 A JPS5753289 A JP S5753289A JP 12841080 A JP12841080 A JP 12841080A JP 12841080 A JP12841080 A JP 12841080A JP S5753289 A JPS5753289 A JP S5753289A
- Authority
- JP
- Japan
- Prior art keywords
- dissolved oxygen
- night soil
- ozone
- treating
- amount
- 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 efficiently decolor secondarily treated water with ozone while suppressing abnormal generation of nitrite ion, by controlling a aeration amount in a secondary night soil-treating vessel so that dissolved oxygen in the treated night soil at an outflow side will by kept in a proper range.
CONSTITUTION: In a night soil-treatment system, sample water is fed to a dissolved oxygen sensor 15 by an underwater pump 14 located near the outlet of a secondary trating vessel 5, to detect the concentration of dissolved oxygen with a dissolved oxygen meter 16. A control valve 17 is operated in accordance with the detected value, to control an amount of air to be blown into the secondary treating bessel 5 in a manner such that dissolved oxygen in the treated water at the outlet of the secondary treating vessel 5 is kept at 1.6ppm or so at most. As a result, nitrite ion is constantly maintained at a few ppm or lower. Consequently, stable decolorization can be performed only by flowing in an amount of ozone required for oxidation and decomposition of coloring compeonents in the ozone-treating step inside the decoloring column 10.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12841080A JPS5753289A (en) | 1980-09-16 | 1980-09-16 | Advanced treatment of night soil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12841080A JPS5753289A (en) | 1980-09-16 | 1980-09-16 | Advanced treatment of night soil |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5753289A true JPS5753289A (en) | 1982-03-30 |
Family
ID=14984080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12841080A Pending JPS5753289A (en) | 1980-09-16 | 1980-09-16 | Advanced treatment of night soil |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5753289A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0342099A (en) * | 1989-07-11 | 1991-02-22 | Tokyo Metropolis | High degree treatment of organic sewage |
-
1980
- 1980-09-16 JP JP12841080A patent/JPS5753289A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0342099A (en) * | 1989-07-11 | 1991-02-22 | Tokyo Metropolis | High degree treatment of organic sewage |
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