Rethinking stormwater treatment with the new Wavin Certaro Lamella HDS
It’s time to rethink the way our cities manage stormwater. Climate resilience and water protection are now high on national agendas, as regulatory and environmental pressures drive municipalities, developers and planners to become more strategic about treating rainwater.
Treating surface water runoff
The moment rainwater touches the urban landscape, it transforms into surface water runoff, carrying with it a complex mix of pollutants. Treating this water before it reaches natural water bodies or infiltration systems is vital to safeguard this valuable natural resource and the wider environment.
Responding to this challenge, we’ve developed the Wavin Certaro Lamella HDS—a next-generation sediment separator engineered for high performance, minimal disruption and maximum environmental gain.
Why better sediment separation matters
Cities and urban areas generate significant surface water runoff. From roads and rooftops to car parks and commercial zones, the majority of urban surfaces aren’t able to soak up rainwater, instead channeling it directly into drainage networks.
Along the way, this runoff picks up harmful contaminants, many of which are bound to fine sediment particles. Without treatment, these pollutants flow into watercourses or soak into the ground via infiltration systems, impacting water quality, natural ecosystems and public health.
The range of sediment-bound pollutants is vast and includes heavy metals like zinc, copper and lead, along with PAHs and mineral oils from vehicle emissions, harmful chemicals, microplastics, nutrients such as phosphates and nitrates, and even dangerous bacteria like E. coli.
The best way to protect against the harmful impact these pollutants can have is by removing sediment as soon as possible. This improves water quality, protects downstream infrastructure and helps urban areas meet increasingly stringent environmental targets.
A compact, effective solution
The Wavin Certaro Lamella HDS is developed to treat surface water at source using two powerful technologies: hydrodynamic separation and lamella settling. Integrated into an innovative chamber-based sediment separator, this dual-action approach has a validated performance for runoff generated by 2,000 m² capturing 80% of average fine sediment and 62% of silt particles. The connected area is scalable beyond with lower efficiency. For climate conditions deviating significantly from Germany the appliance of a rainfall-intensity factor is recommended.
Housed in a compact DN1000 manhole, this space-saving solution is ideal for tight urban projects where excavation is difficult or costly. Whether installed under walkways, parking areas or public roads, the Certaro Lamella HDS offers high performance without high disruption.
Built for fast installation and easy maintenance
The Certaro Lamella HDS's modular design makes it easy to integrate into construction projects. It features optional riser rings that allow for flexible installation depths up to 3.1m, while a straightforward stacking system and standard pipe connections make it compatible with common drainage setups.
Importantly, it’s also designed with maintenance in mind. Sediment is collected in a central sump and cleaned like a simple road-gully, with the addition of removing a plug. Regular cleaning is fast, safe and doesn’t require specialist equipment, so it’s easy for municipal authorities and service providers to keep the system running efficiently.
Sustainability in every detail
The Certaro Lamella HDS is built with sustainability in mind. It not only supports clean water outcomes by preventing pollutants from entering water bodies, but it’s also manufactured using recycled plastic, contributing to circularity goals and lower CO2 emissions.