3D EAU product
Network storage solutions based on the use of self-operated tilting gate systems
Issues
How to reduce discharges into the natural environment by making the most of the capacity of the sewer network?
The proper operation of a wastewater treatment system can be assessed through the direct discharges of wastewater into the natural environment. Reducing these discharges is therefore a major challenge. Exploiting the storage capacity of wastewater collectors is an alternative to building stormwater tanks.
Comment optimiser le stockage et la gestion des eaux pluviales ?
Innovative solutions by 3D EAU
The self operated tilting gate system
Storage and regulation valve for in-line storage in collectors and fusegate on storm overflows.
Some examples
Regulation system
Fusegate
Sizing and design of a storage in network solution
Eligibility survey
Identify relevant areas for storage.
Positioning the valves
Determine their number using a Pareto type analysis to optimise the cost/efficiency ratio, avoiding an excessively costly solution compared with a conventional tank storage solution.
Hydraulic dimensioning
In collaboration with the client, a design office will design the structures and validate their performance over a representative annual period, while ensuring that there is no increase in the risk of flooding for a reference storm.
Il compare la solution avec un bassin d’orage aux performances équivalentes pour une évaluation financière pertinente.
Final design study
- Using CFD and a structural study, taking into account the geometric and hydraulic specificities of each site.
- SolidWorks drawing: division of the structure into transportable parts passing through the manholes.
- Tests on test benches to validate opening and closing heights.
Manufacture and installation of the network storage valves
The gates are designed and made to measure in stainless steel in our workshops in France.
3D EAU then carries out tests on a test bench to validate their hydraulic operation. They are then delivered to the site for installation.
Network storage gates are installed without trenches and in just a few days, with a minimum of civil engineering work. The gates are lowered through the existing access manhole and installed in the network.
Instrumentation
- The solution is designed to measure flow using sensors (height, inclinometers) integrated into a supervision system.
- Calibration using CFD is possible to ensure high measurement accuracy, taking into account the specific hydraulic and geometric characteristics of the site.
Maintenance of the self operated tilting gates
The system benefits from simplified maintenance (seals to be changed approximately every 3 years, only consumable items), guaranteeing low operating costs. It can be carried out by 3D EAU under a maintenance contract.
Benefits
Cost-effective, low-impact solution that’s quick to implement
Robust all-mechanical system with no electricity supply, the design of which was the subject of a PhD thesis
Instrumented device for monitoring flow rate
Operation adapted to the specific features of each network thanks to integration in a 1D hydraulic model
Anti-return function in the event of downstream influence on the receiving environment