JPS5799397A - Purification of water - Google Patents
Purification of waterInfo
- Publication number
- JPS5799397A JPS5799397A JP55176192A JP17619280A JPS5799397A JP S5799397 A JPS5799397 A JP S5799397A JP 55176192 A JP55176192 A JP 55176192A JP 17619280 A JP17619280 A JP 17619280A JP S5799397 A JPS5799397 A JP S5799397A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- waste water
- averaged
- fed
- 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.)
- Pending
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 raise denitrification efficiency, in an active sludge process, by letting an excess sludge-extracting rate correspond to an averaged inflow rate of sludge returned to an aeration vessel, an averaged inflow rate of waste water and a fixed sludge-storing period computed from the temperature of water.
CONSTITUTION: Waste water having flowed through a waste water pipe 1 into an aeration vessel 2 is aerated by air fed from a blower 6 through an air-feed pipe 15, and then fed through an overflow pipe 16 into a precipitating vessel 3. Extraction of excess sludge outside the system is controlled by the method as follows: An output from the electrode 7 of a water thermometer located inside the aeration vessel 3 is fed to an operator 12 which calculates a sludge-storing period necessary at a minimum for nitrification at the water temperature, and the resultant output is fed to an operating controller 15. Signals, representing an averaged waste water inflow rate Q'i and an averaged returned sludge inflow rate Q'r operated 13, 19 on the basis of signals from an inflow meter 10 for the waste water and a flow meter 8 for the returned sludge, respectively, are inputted into the said operating controller 15. The operator 15 calculates a sludge- extracting rate Qex on the basis of these inputs in accordance with the formula, and the calculation result is outputted to a control pump 5.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55176192A JPS5799397A (en) | 1980-12-12 | 1980-12-12 | Purification of water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55176192A JPS5799397A (en) | 1980-12-12 | 1980-12-12 | Purification of water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5799397A true JPS5799397A (en) | 1982-06-21 |
Family
ID=16009241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55176192A Pending JPS5799397A (en) | 1980-12-12 | 1980-12-12 | Purification of water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5799397A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6456197A (en) * | 1987-08-27 | 1989-03-03 | Meidensha Electric Mfg Co Ltd | Control device for activated sludge treatment system |
-
1980
- 1980-12-12 JP JP55176192A patent/JPS5799397A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6456197A (en) * | 1987-08-27 | 1989-03-03 | Meidensha Electric Mfg Co Ltd | Control device for activated sludge treatment system |
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