In 2010, four stormwater tanks in Wädenswilon Lake Zurich were equipped with MID-controlled PNA pneumatic discharge controls. This system was chosen at that time because it could be easily retrofitted in the old tanks, requires little space and allows the throttle volume to be changed at any time. In addition, a complete throttle shaft from STEBATEC was installed in the rainwater reservoir Schlossgasse, which has an untypical geometry due to its location between the railway track and the rainwater reservoir.
Operating cost divider according to stationarily measured external water quantities.
An association of twelve municipalities in Wallis was looking for a just cost allocation solution to account for the high foreign water content in the waste water entering the treatment plant. The measuring system installed now records the different outflows and thereby rewards those municipalities that already have installed a separation system.
For 15 years, VKA and STEBATEC, the German Association for Sewerage and Wastewater Treatment, have been working together successfully. The latest milestone is the introduction of ARAbella ONLINE: With the web-based process control system, processes can be controlled online via remote access. A management of the waste water quantities becomes possible.
The Oberregenbach sewage treatment plant of the town of Langenburg (D) is located between Stuttgart and Nürnburg and treats the waste wa-ter of about 1,800 inhabitants. Located on the foot of a slope, the water from the storm-water basin runs down a steep canal. Before the STE-BATEC drain controller was installed, the waste water was slowed down by a mechanical scale throttle before it entered the sewage treatment plant.
The Region Oberes Simmental sewage treatment plant treats sewage of the municipalities of Lenkand Zweisimmen. The largest inflow passes through the Galgenbühl storm overflow basin, other inflows originate in the area of Mannried and the Grubenwald pumping station. During rainy spells the inflow from Mannried often causes overload conditions in the sewage treatment plant.
Reinhalteverband Mühltal & Region Böhmerwald, A-Auberg
The Reinhalteverband Mühltal & Region Böhmerwald in Upper Austria consists of 24 municipalities, looks after around 1.000 km of sewer, 18.000 sewer shafts, 300 pumping stations, 60 storm waterbasins and 6 sewage treatment plants. Despite its size, however, the drainage system reached its limits. The individually operated storm waterbasins, for example, relieved the load rigidly into the recipient in the event of overload.
Electromechanical equipment for the Ipsach rainwater basin
The Association for Sewers and Waste Water (VKA) in Nidau is responsible for the waste water treatment plants from Port to Moeringen on the southern banks of Lake Bielersee. The Association manages several rainwater basins and pumping station. The Ipsach rainwater basin was built in the early 1990s. The unique feature is that this is a rainwater basin in a connected system.
Wastewater treatment plant Langnau im Emmental, wastewater storage basin Zeughaus
“The LDM is a very intuitive system. The transmitter provides the information I need at a glance” says Hans Stucki, plant manager of ARA Langnau, who wanted a precise and reliable measuring device to limit the amount of water transferred and to measure dry weather quantities for billing.
The old weir in the spillway at the Postplatz in Solothurn served for many years, but now had to make way for a system that meets the requirements of modern sewer network operation. The water flows from the 1.7m inlet canal via the opening in the ground (jump weir) into the 600-metre canal, which is about 1m lower, in the direction of the sewage treatment plant.
The sewage treatment plant in Le Landeron has recently been running on STEBATEC’s ARAbella online process control system, which allows the plant to be accessed from anywhere via a browser. Massively higher operating convenience and availability from any location are among the main advantages of the new control technology. At the same time, the PLC control programs were migrated to new hardware.
Installation of pneumatic outflow controls in the storm-water sedimentation basin of the sewage treatment plant
The pneumatic discharge control system installed in 2011 at the storm water tank in the direct inlet of the sewage treatment plant ensures stable hydraulic conditions. Previously, there had been regular incidents because the throttling device was unable to continuously feed the water from the stormwater tank, which is located in the main intake, to the sewage treatment plant.
Precise and reliable flow measurement and limitation.