Enhanced stormwater treatment:

• Treatment of polluted runoff from roads, car parks and roofs (including metal roofs)

• Underground solution, no additional space required

• Low head loss

• Easy inspection and maintenance

• Filter media retained in a cartridge

• Cartridge exchange interval 3 to 5 years

• Connectable surface area 130 to 200 m2

• Bavarian state approval for metal roofs

Decentralized stormwater treatment is state of the art because it reduces the costs for urban drainage by using source control. The HydroChain™ 400 filtration unit has numerous advantages in comparison with other systems. The system combines a hydrodynamic separator with a filter unit, it is easy to inspect and maintain. There is only low head loss. Filter media is kept in a cartridge, there is no loose material in the system. The filter cartridge has to be replaced in intervals between 3 and 5 years depending on the sites conditions. There is virtually no footprint because the system can be installed in the ground or a rainwater tank. The filter media removes pollutants including PAH ́s, hydrocarbons and heavy metals. Furthermore, it binds phosphorous and ammonium from stormwater runoff. The step treatment train solids and dissolved substances. The system is ideal for traffic areas, roofs and even metal roofs. Four different filter cartridges for low traffic densities, high traffic densities, normal roofs and metal roofs are available. Highest pollutant levels in stormwater runoff can be reduced to acceptable loads for groundwater and the surface waters. The modular design allows adaption to nearly every site condition. Stormwater filter with a dimension of 400 mm. Suitable for contaminated runoff from trafficked areas or roofs. The cleaned water can be discharged directly into infiltration facilities or rainwater tanks. The filter works by an up-flow process with low head loss. In the system the stormwater runoff is cleaned by sedimentation, adsorption, filtration, and chemical precipitation. Incoming water is led down to the basal section of the filter shaft. A hydrodynamic separator promotes sedimentation. Particles settle in the silt trap located below the separation chamber. Above the separation chamber a filter cartridge, the full shaft width such that all water must flow up through the filter media. The clogging of the filter is reduced due to the upwards flow. The filter cartridges can be easily exchanged. The system is maintained and back flushed normally once a year.