JPS5520623A - Treating method of waste water - Google Patents
Treating method of waste waterInfo
- Publication number
- JPS5520623A JPS5520623A JP9286878A JP9286878A JPS5520623A JP S5520623 A JPS5520623 A JP S5520623A JP 9286878 A JP9286878 A JP 9286878A JP 9286878 A JP9286878 A JP 9286878A JP S5520623 A JPS5520623 A JP S5520623A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- aerating
- activated
- treatment
- waste water
- 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
- Treatment Of Sludge (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
PURPOSE: To increase the removal rate of NOX in primary and secondary treatments and remove BOD and NOX of high concentration waste water efficiently at a high degree by such things as returning the sludge having been activated in a re- aerating tank to the activated sludge treating tank of secondary treatment from the final precipitating tank.
CONSTITUTION: Concentrated waste water is directly subjected to primary treatment in a photosynthesizing bacteria treating tank and is then subjected to secondary treatment in an activated sludge treating tank. This treated water is transferred into an intermediate precipitating tank to extract excess sludge. The supernatant water is passed through the nitration tank, denitrification tank, re-aerating tank and final precipitating tank, these being the tertiary treatment, after which it is discharged. The sludge which has been activated to have better adsorptivity in the re-aerating tank of the tertiary treatment is returned to the activated sludge treating tank of the secondary treatment. This activated sludge treating tank is so set as to allow for stagnation of 4 to 48 hours. Part of the intank liquid of the denitrification tank, re-aerating tank and final precipitating tank is returned to the nitration tank to control the pH of the liquid in the nitiration tank to 6.2 to 9.2.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9286878A JPS5520623A (en) | 1978-07-29 | 1978-07-29 | Treating method of waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9286878A JPS5520623A (en) | 1978-07-29 | 1978-07-29 | Treating method of waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5520623A true JPS5520623A (en) | 1980-02-14 |
| JPS6320599B2 JPS6320599B2 (en) | 1988-04-28 |
Family
ID=14066399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9286878A Granted JPS5520623A (en) | 1978-07-29 | 1978-07-29 | Treating method of waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5520623A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5849165A (en) * | 1988-11-01 | 1998-12-15 | Ngk Spark Plug Co. Ltd. | Oxygen sensor for preventing silicon poisoning |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS498540A (en) * | 1972-05-22 | 1974-01-25 | ||
| JPS5091954A (en) * | 1973-12-20 | 1975-07-23 | ||
| JPS50129479A (en) * | 1974-03-30 | 1975-10-13 | ||
| JPS50138648A (en) * | 1974-04-19 | 1975-11-05 |
-
1978
- 1978-07-29 JP JP9286878A patent/JPS5520623A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS498540A (en) * | 1972-05-22 | 1974-01-25 | ||
| JPS5091954A (en) * | 1973-12-20 | 1975-07-23 | ||
| JPS50129479A (en) * | 1974-03-30 | 1975-10-13 | ||
| JPS50138648A (en) * | 1974-04-19 | 1975-11-05 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5849165A (en) * | 1988-11-01 | 1998-12-15 | Ngk Spark Plug Co. Ltd. | Oxygen sensor for preventing silicon poisoning |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6320599B2 (en) | 1988-04-28 |
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