![By-pass vis de relevage amont station d'épuration](https://www.dsl.fr/app/uploads/2020/10/by-pass-vis-de-relevage-amont-station-depuration.jpg)
Bypassing Raising Screw Upstream of Wastewater Treatment Plant
Installation and control of a provisional pumping station to by-pass upstream raising screws for a wastewater treatment plant
Context
Project Type :
Pumping Solutions
Location :
La Wantzenau (67)
![Logo entreprise Valeaurhin](https://www.dsl.fr/app/uploads/2020/10/logo-valeaurhin.gif)
Problem
- To undertake the civil engineering works for a conduit between the upstream raising and the medium grilles of the wastewater treatment plant, the customer has asked us to install and control a provisional pumping station enabling the function of the upstream raising of the WWTP to be ensured.
Solution
- Supply, installation and commissioning of a provisional pumping installation of 20 000 m³/h (5.5 m³/s):
- 12 submersible drying pumps of 110 kW (2 of which on the surface on the horizontal frame)
- 3 generators 1 250 kVA (one of which is for back-up)
- 800 m of riser pipes Ø 400
- Automatic control of pumps (start/stop cabinets, speed regulator cabinets)
- Web monitoring (operation of generators, operation of pumps, flow rates pumped, alarms, on-call service)
- 1 site manager + 4 engineers
- Duration: 7 months
![800 mètres de tuyaux de refoulement en DN 400](https://www.dsl.fr/app/uploads/2020/10/by-pass-vis-de-relevage-amont-station-depuration-6.jpg)
![](https://www.dsl.fr/app/uploads/2020/10/by-pass-vis-de-relevage-amont-station-depuration-2.jpg)
![Tuyaux de refoulement DN 400](https://www.dsl.fr/app/uploads/2020/10/by-pass-vis-de-relevage-amont-station-depuration-3.jpg)
![2 pompes de surface d'assainissement H12K](https://www.dsl.fr/app/uploads/2020/10/by-pass-vis-de-relevage-amont-station-depuration-4.jpg)
![8 pompes submersibles H12K installées dans l'eau](https://www.dsl.fr/app/uploads/2020/10/by-pass-vis-de-relevage-amont-station-depuration-5.jpg)
![Pompes submersibles d’assainissement H12K](https://www.dsl.fr/app/uploads/2020/10/by-pass-vis-de-relevage-amont-station-depuration-1-1.jpg)