JPS56113394A - Defoaming type sv meter - Google Patents
Defoaming type sv meterInfo
- Publication number
- JPS56113394A JPS56113394A JP1501680A JP1501680A JPS56113394A JP S56113394 A JPS56113394 A JP S56113394A JP 1501680 A JP1501680 A JP 1501680A JP 1501680 A JP1501680 A JP 1501680A JP S56113394 A JPS56113394 A JP S56113394A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- air bubbles
- meter
- high pressure
- compressed air
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Activated Sludge Processes (AREA)
Abstract
PURPOSE: To eliminate the delay of generating precipitations which would be derived from the decrease of a precipitation speed caused by air bubbles, and to offer an appropriate SV index, by using a defoaming type SV meter equipped with a mechanism for destroying the air bubbles with a compressed air or a reduced pressure.
CONSTITUTION: A sludge slurry is carried from a conduit 2 into a measuring vessel 1 at such a rate to flow over a pipe 3, by closing valves V3, V4 and opening valves V1, V2. The valves V1, V2 are closed and the valve V3 only is kept open, to introduce a compressed air (e.g. 3kg/cm2) from a compressed air pipe 4 into the measuring vessel 1 and to maintain the high pressure therein. After this high pressure state is maintained 30min., an ultrasonic type boundary meter 5 is operated to measure a distance to the surface of generated sludge precipitations. An SV index is computed on the basis of this distance. The ultrasonic type boundary meter 5 used in the example may be applicable in such a manner that, during the leaving period at rest under the high pressure after sampling, the sludge slurry is affected with ultrasonic vibrations to increase the contact frequency of the air bubbles with the slurry, but not to generate cavitations in the slurry. This application can increase the dissolution speed of the air bubbles into the slurry.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1501680A JPS56113394A (en) | 1980-02-10 | 1980-02-10 | Defoaming type sv meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1501680A JPS56113394A (en) | 1980-02-10 | 1980-02-10 | Defoaming type sv meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56113394A true JPS56113394A (en) | 1981-09-07 |
| JPS6344034B2 JPS6344034B2 (en) | 1988-09-02 |
Family
ID=11877066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1501680A Granted JPS56113394A (en) | 1980-02-10 | 1980-02-10 | Defoaming type sv meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56113394A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020183577A1 (en) * | 2019-03-11 | 2020-09-17 | 株式会社 ゴーダ水処理技研 | Testing method for wastewater treatment facility |
-
1980
- 1980-02-10 JP JP1501680A patent/JPS56113394A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020183577A1 (en) * | 2019-03-11 | 2020-09-17 | 株式会社 ゴーダ水処理技研 | Testing method for wastewater treatment facility |
| CN113518764A (en) * | 2019-03-11 | 2021-10-19 | 江田水处理技研株式会社 | Test method for wastewater treatment facility |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6344034B2 (en) | 1988-09-02 |
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