Optimization of a biodisc WWTP by adding a lamella clarifier
Integration of a lamella clarifier downstream of the biodiscs to stabilize performance, reduce non-conformities and relieve final filtration. Compact, modular and easy to operate, the solution adapts to the existing footprint and sustainably improves water quality without affecting biological treatment.
Project information
- Bardos (64, FR)
- 2022
- Keywords
- Capacity
1,000 – 3,000 PE
Common range of biodisc WWTPs equipped with lamella
- Settling
Compact lamella clarifier
Enhanced clarification before final filtration
- Preserved sector
Biological core unchanged
Downstream optimization without modifying biodiscs
- Performance
MES & DCO reduction
Drum filter relief and stabilized compliance
Project Background
In a biodisc WWTP, the drum filters placed after the biological treatment limited performance, with frequent exceedances in suspended solids and COD. The station was operating at capacity limits and was no longer able to guarantee compliance. A simple solution, quick to integrate and without modifying the biological heart, was needed.
Objectives
Reduce non-conformities, relieve final filtration, stabilize performance during periods of load and remain within the existing footprint. The solution had to be compact, modular and compatible with existing infrastructure.
Technical solution
Installation of a lamella clarifier downstream of the biodiscs: improved separation of suspended solids, reduction of the load on the drum filters and absorption of hydraulic peaks. The module works as a solid/hydraulic buffer to obtain much clearer water before filtration.
CNC prefabrication & modularity
The lamella is compact, prefabricated and sized to fit into existing structures. The inclined plates maximize the settling surface while maintaining a small footprint, and the configuration allows for subsequent extensions without heavy work.
On-site implementation
Installation of the lamella clarifier in the existing right-of-way, simple connection downstream of the biodiscs, management of purges and installation of control accesses. Operation was maintained during the work thanks to a quick and non-intrusive intervention.
Results
The MES and COD performance has stabilized, the final filtration is significantly relieved and the load peaks are now absorbed. The plant regained a compliant and regular water quality, without increasing the number of equipment or modifying the biological treatment.
Operation & Maintenance
Simple maintenance: easy visual inspection, quick rinses and accessible purges. The lamella improves the regularity of the overall operation and makes the operation of the biodiscs more serene even under difficult conditions.
Key figures
- Stabilized suspended solids — significant reduction at lamella output
- Smoothed COD/BOD5 — better biodisc operation
- Relieved final filtration — reduced clogging of drum filters
- Compact integration — no changes to the biological core
- Scalable solution — expandable without major work
Product focus: Compact lamella clarifier
To improve the downstream clarification of the biodiscs and reduce SS/COD exceedances, we have integrated a compact lamella clarifier specially sized for this WWTP.
Thanks to its inclined plates, it greatly increases the available settling surface and accelerates the separation between clear water and sludge, while maintaining a minimum footprint compatible with existing structures.
Working as a true hydraulic and solid buffer, it smooths out flow peaks, relieves drum filters and stabilizes water quality regardless of load. Its modular design allows for simple maintenance: accessible purges, quick checks, and reliable operation without heavy intervention.
This module is a compact, economical and scalable solution to sustainably restore the performance of a biodisc system, without affecting the biological treatment or undertaking complex work.
- Lamella settling
- MES reduction
- DCO / BOD5 stabilization
- Management of hydraulic peaks
- Biodisc-compatible
- Compact & modular
-
Compact lamella clarifier DLC
Lamella clarifiers
Steps to collaborate
- WWTP analysis — SS/COD/BOD₅ balances, flow rates, hydraulic peaks and biodisc performance.
- Lamella design — lamella surface, speeds, purges, integration into the existing right-of-way.
- Manufacturing & logistics – compact prefabricated module, preparation of accessories and connections.
- On-site installation — lamella installation, hydraulic connections, continuity of operation.
- Testing & Commissioning — hydraulic adjustments, drum filter optimization, performance stabilization.
- Support & follow-up – training of teams, operating advice, adjustments according to actual loads.
DO YOU HAVE A PROJECT?
A similar project? Let's talk about it.
Optimization of an existing plant, recycling of industrial effluents, sizing of a new facility… Our teams can adapt our modular solutions to your technical and budgetary constraints.
