Autonomous instrumentation for wastewater network sectorization
CONTEXT :
As part of its public service delegation, this water company is committed to researching and reducing the contribution of parasitic water to the agglomeration, with the installation of measuring equipment.
The wastewater network is divided into catchment areas, and the first analysed data are the flows passing through the stations, either from pump operating times linked to pump flow, or from electromagnetic flowmeters installed on the discharge points.
Catchment areas can cover large surfaces, in which case sub-sections allow better targeting of network malfunctions.
- An autonomous and communicating instrumentation solution a mandatory requirement
- Ease and quick installation required
- 13 sub-sectorization points have been defined.
Selecting the right equipment :
The OSRAI solution + IJINUS water level measurement solution (using ultrasonic or radar technology) easily meets these needs thanks to its ease of installation.
A preliminary inspection of the site will enable us to validate the correct hydraulic conditions, and to select the OSRAI contraction sizes that allow good level measurement and a valid hydraulic law.
The main constraints are slope, multiple inlets and curves in the invert..
OSRAI FLOW
The autonomous, communicating solution for reliably converting a water level measurement into a flow rate. The Osrai Flow system is based on the principle of flow contraction by an “obstacle” to guarantee a hydraulic relationship between the flow and the head of water upstream …
LNU06V4 ultrasonic water level sensor
The integrated ultrasonic level sensors are autonomous and communicate locally by radio and remotely by 2G/4G. Their design makes them particularly suitable for level measurement in harsh environments.
- Autonomous devices, internal battery with battery indicator built into the sensor. No need to return to factory to change battery.
- Loggers with wireless radio configuration (with Wiji).
- Equipped with 2G/4G LTE modem, interchangeable without returning to factory. Data sent to client server/supervisor via ftps.
- The OSRAIflow contraction has a low fouling level.
- 3D hydraulic law validated by 1/1 laboratory pilot with accuracy of the order of 5%. Conversion Law integrated into IJINUS sensor.
- Easy to install (4 drill holes only for the whole solution).
- Solution can be installed in a fixed position or easily moved without the need for any machinery.
