CH679663A5 - Rain water treatment - in pre:clarification tanks of waste water treatment plant - Google Patents
Rain water treatment - in pre:clarification tanks of waste water treatment plant Download PDFInfo
- Publication number
- CH679663A5 CH679663A5 CH461/91A CH46191A CH679663A5 CH 679663 A5 CH679663 A5 CH 679663A5 CH 461/91 A CH461/91 A CH 461/91A CH 46191 A CH46191 A CH 46191A CH 679663 A5 CH679663 A5 CH 679663A5
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- water treatment
- waste water
- fed
- tanks
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/101—Dedicated additional structures, interposed or parallel to the sewer system
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/006—Water distributors either inside a treatment tank or directing the water to several treatment tanks; Water treatment plants incorporating these distributors, with or without chemical or biological tanks
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/105—Accessories, e.g. flow regulators or cleaning devices
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
-
- 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
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Activated Sludge Processes (AREA)
Abstract
(A) In rain water treatment involving purification in waste water preclarification tanks, the novelty is that part of the preclarified water is fed to aeration tanks (19) and the remainder is fed to the decanter (10). (B) Appts. for carrying out the process has a double structure of hydraulic sloping drain channels (1,2). ADVANTAGE - The rain water is mechanically treated together with waste water and provides the requisite water amt. for biological purifcn. of the waste water, thus improving the overall purifcn. effect and efficiency.
Description
Die Erfindung betrifft ein Verfahren zur Behandlung von Regenwasser aus Mischwasserkanalisationen in Vorklärbecken von Abwasserreinigungsanlagen und eine Vorrichtung zur Durchführung dieses Verfahrens.
In der Abwassertechnik sind zur Behandlung von Regenwasser einzelne Verfahren bekannt. Vor allem werden zu diesem Zweck Regenrückhaltebecken am Kanalisationsnetz oder unmittelbar vor den Abwasserreinigungsanlagen gebaut. Diese kommen nur ein paar Tage pro Jahr zum Einsatz und stellen eine teure Investition dar. Ohne Rückhaltebecken wird jedoch die biologische Abwasserreinigungsstufe, das heisst das Belebungsbecken und das Nachklärbecken, unnötig mit Regenwasser belastet, was eine wesentliche Abnahme des Reinigungseffektes zur Folge hat.
Der Erfindung liegt demgemäss die Aufgabe zugrunde ein besseres Verfahren zur Regenwasserbehandlung verfügbar zu machen, welches erlaubt, sowohl die dem bekannten Verfahren anhaftenden Nachteile zu vermeiden, als auch den Gesamtreinigungseffekt und die Wirtschaftlichkeit wesentlich zu verbessern.
Die erfindungsgemässe Lösung besteht darin, dass das anfallende Regenwasser aus Mischwasserkanalisationen nicht mehr separat, sondern gemeinsam mit dem übrigen Abwasser in einer Verfahrensstufe mechanisch behandelt wird. Die zur biologischen Reinigung bestimmte Wassermenge wird durch eine Überlaufrinne am Rande der Vorklärbecken den Belebungsbecken zugeführt. Das Regenwasser läuft über diese Rinne in eine zweite, parallel angeordnete Rinne zum Vorfluter.
Dabei wird in vorteilhafter Weise die Regenwasserbehandlung gemäss der Zuflussmenge QRWA gesteuert. Die Messung der Zuflussmenge geschieht am Schwerpunkt des Kanalisationsnetzes oder vor der Abwasserreinigungsanlage. Die Steuerung bezweckt die Schaffung eines Rückhalteraumes im Vorklärbecken. Dieser Raum entsteht durch eine dem Zufluss des Regenwassers vorangehende Förderung des abgesetzten Schlammes in die Eindicker und des vorgeklärten Abwassers in die Belebungsbecken. In zweckmässiger Weiterentwicklung des Verfahrens kann das Abwasser mittels eines Schiebers in der Überlaufrinne zu den Belebungsbecken abgelassen werden.
Die Erfindung betrifft ferner eine Vorrichtung zur Durchführung des Verfahrens. Die Vorrichtung kann sowohl an Längsbecken als auch an Rundbecken angewendet werden. Sie kann auch an bestehenden Vorklärbecken appliziert werden.
Die Erfindung wird nachstehend anhand der beigefügten Zeichungen näher erläutert.
Fig. 1 zeigt eine Vorrichtung zur Regenwasserbehandlung in den Vorklärbecken, die aus zwei parallelen Abflussrinnen besteht. Die Rinne 1 dient der Ableitung des Abwassers in die Belebungsbecken. Bei Regen wird diese Rinne 1 überflutet und das Wasser durch die Überlauföffnungen 3 der Rinne 2 zugeleitet.
Fig. 2 zeigt die Vorrichtung gemäss Fig. 1 mit einer Pumpe 4, die bei Normalbetrieb zur Förderung des Schlammes in die Eindicker 5 dient. Bei Regen wird die Pumpe 4 entsprechend der Zuflussmenge QRWA im Kanalisationsnetz oder vor der Abwasserreinigungsanlage eingeschaltet und gesteuert. Die Pumpe 4 kann auch durch Zeitimpuls entsprechend dem Schlammvolumen in den Vorklärbecken ausgeschaltet werden.
Die Ausschaltung kann auch aufgrund von Trübungsmessung gesteuert werden.
Fig. 3 zeigt die Vorrichtung nach Fig. 1 und Fig. 2 mit einer Pumpe 6 für die Förderung des vorgeklärten Abwassers durch die Rinne 1 zum Belebungsbecken. Die Pumpe 6 wird entsprechend der Zulaufmenge QRWA im Kanalisationsnetz oder vor der Abwasserreinigungsanlage eingeschaltet und durch Zeitimpuls ausgeschaltet. Dieser Zeitimpuls soll sich nach der Fliesszeit des Wassers zwischen Messpunkt QRWA und den Vorklärbecken richten.
Die in Fig. 4 dargestellte Vorrichtung entspricht im wesentlichen denjenigen in Fig. 1 und Fig. 2, wobei jedoch das vorgeklärte Abwasser durch \ffnen eines Schiebers 7 in der Rinne 1 in die Biologiebecken abgelassen wird. Im Bereich des Schiebers 7 weist die Rinne 1 eine Vertiefung 8 auf.
Fig. 5 zeigt die Vorrichtung nach Fig. 1 ff. in der Anordnung für Längsbecken.
Das vorgeklärte Abwasser fliesst durch die Rinne 1 zum Belebungsbecken 9. Das Regenwasser fliesst duch die Überlauföffnungen 3 und die Rinne 2 zum Vorfluter 10.
Fig. 6 zeigt die Vorrichtung nach Fig. 1 ff. in der Anordnung für Rundbecken.
The invention relates to a method for the treatment of rainwater from mixed water sewers in primary settling tanks of wastewater treatment plants and a device for carrying out this method.
Individual methods for treating rainwater are known in wastewater technology. Above all, rainwater retention basins are built on the sewage network or immediately in front of the wastewater treatment plants. These are only used for a few days a year and represent an expensive investment. Without a retention basin, however, the biological wastewater treatment stage, i.e. the aeration basin and the secondary clarification basin, are unnecessarily contaminated with rainwater, which has a significant decrease in the cleaning effect.
The invention is accordingly based on the object of making a better method for rainwater treatment available, which makes it possible both to avoid the disadvantages inherent in the known method and to substantially improve the overall cleaning effect and the economy.
The solution according to the invention consists in that the rainwater from mixed water sewage systems is no longer treated separately, but rather mechanically together with the rest of the waste water in one process step. The amount of water intended for biological purification is fed to the aeration tank through an overflow channel on the edge of the primary clarifier. The rainwater runs through this channel into a second, parallel channel to the receiving water.
The rainwater treatment is advantageously controlled in accordance with the QRWA flow rate. The inflow volume is measured at the center of gravity of the sewer network or in front of the wastewater treatment plant. The control aims to create a retention space in the primary clarifier. This space is created by pumping the settled sludge into the thickener and the pre-clarified wastewater into the aeration basin prior to the inflow of rainwater. In an expedient further development of the process, the wastewater can be drained off to the activation tank by means of a slide in the overflow channel.
The invention further relates to an apparatus for performing the method. The device can be used on both longitudinal pools and round pools. It can also be applied to existing primary settling tanks.
The invention is explained below with reference to the accompanying drawings.
Fig. 1 shows a device for rainwater treatment in the primary clarifier, which consists of two parallel drainage channels. The channel 1 is used to discharge the waste water into the aeration tank. When it rains, this channel 1 is flooded and the water is supplied to the channel 2 through the overflow openings 3.
FIG. 2 shows the device according to FIG. 1 with a pump 4, which serves to convey the sludge into the thickener 5 during normal operation. When it rains, the pump 4 is switched on and controlled in accordance with the flow rate QRWA in the sewage network or in front of the wastewater treatment plant. The pump 4 can also be switched off by a time pulse corresponding to the sludge volume in the primary settling tank.
The switch-off can also be controlled on the basis of turbidity measurement.
Fig. 3 shows the device according to Fig. 1 and Fig. 2 with a pump 6 for conveying the pre-clarified waste water through the channel 1 to the aeration tank. The pump 6 is switched on in accordance with the inflow quantity QRWA in the sewage network or in front of the wastewater treatment plant and switched off by a time pulse. This time pulse should be based on the flow time of the water between the QRWA measuring point and the primary clarifier.
The device shown in FIG. 4 corresponds essentially to that in FIGS. 1 and 2, but the pre-clarified waste water is drained into the biology basin by opening a slide 7 in the channel 1. In the area of the slide 7, the channel 1 has a depression 8.
Fig. 5 shows the device according to Fig. 1 ff. In the arrangement for longitudinal pools.
The pre-clarified wastewater flows through the channel 1 to the activation tank 9. The rainwater flows through the overflow openings 3 and the channel 2 to the receiving water 10.
Fig. 6 shows the device according to Fig. 1 ff. In the arrangement for round pools.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH461/91A CH679663A5 (en) | 1991-02-15 | 1991-02-15 | Rain water treatment - in pre:clarification tanks of waste water treatment plant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH461/91A CH679663A5 (en) | 1991-02-15 | 1991-02-15 | Rain water treatment - in pre:clarification tanks of waste water treatment plant |
Publications (1)
Publication Number | Publication Date |
---|---|
CH679663A5 true CH679663A5 (en) | 1992-03-31 |
Family
ID=4187546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH461/91A CH679663A5 (en) | 1991-02-15 | 1991-02-15 | Rain water treatment - in pre:clarification tanks of waste water treatment plant |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH679663A5 (en) |
-
1991
- 1991-02-15 CH CH461/91A patent/CH679663A5/en not_active IP Right Cessation
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0125235B1 (en) | Process and apparatus for the biological purification of waste water | |
EP1612191A1 (en) | Fully biological sewage treatment installation according to the SBR process with the reactor integrated in the preclarification tank | |
EP0773908B1 (en) | Method and device for purifying waste water, in particular for fully biological domestic sewage treatment systems | |
EP0893413A1 (en) | Process and device for the biological treatment of liquids, in particular for the complete biological clarification of waste water | |
DE4307288A1 (en) | Process for biological wastewater treatment with integrated buffering | |
DE2239041A1 (en) | PURIFICATION SYSTEM FOR WASTE WATER | |
EP1559686B1 (en) | Clarification device with outlet device for clarified water | |
DE3207658A1 (en) | Process and device for the removal of sand and sludge from waste waters | |
CH679663A5 (en) | Rain water treatment - in pre:clarification tanks of waste water treatment plant | |
EP0749942A2 (en) | Installation for the biological treatment of waste water | |
DE10123152B4 (en) | Biological wastewater treatment plant for municipal, commercial and agricultural wastewater and process for operating the plant | |
DE4400780C2 (en) | Device for the two-stage treatment of water in water treatment plants, in particular of waste water in sewage treatment plants, and in particular for nitrification and denitrification | |
DE3235992A1 (en) | Apparatus for the biological purification and denitrification of effluent | |
DE1584911B2 (en) | Process for the biological purification of wastewater by means of immersed drip heads and a sewage treatment plant to carry out the process | |
DE1958247A1 (en) | Biological purification plant for waste - water | |
DE102008021137B4 (en) | Pond sewage treatment plant and process for improving existing pond sewage treatment plants | |
DE10001181B4 (en) | Process and plant for the sedimentation and denitrification of wastewater by the activated sludge process | |
DE1584917C3 (en) | Sewage treatment plant for chemical and biological purification of refinery and chemical wastewater | |
DE19842884C9 (en) | PROCESS FOR BIOLOGICAL AND BIOLOGICAL-CHEMICAL TREATMENT OF WASTE WATER WITH INTEGRATED SLUDGE SEPARATOR | |
DE19641681A1 (en) | Process for wastewater treatment in small wastewater treatment plants | |
AT408340B (en) | Process for purifying municipal or similar wastewater | |
CH622227A5 (en) | ||
DE19938016A1 (en) | Method and device for biological wastewater treatment | |
DE7308936U (en) | DEVICE FOR TREATMENT OF ACTIVATED SLUDGE | |
AT232931B (en) | Process for the continuous purification of waste water in a sewage treatment plant and device for carrying out the process |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |