Hydrosystem road train


Operating principle

Operating principle
  1. The stormwater flows via a scumboard into the system,
  2. From where it flows via two channels into the hydrodynamic separator.
  3. A radial flow regime is generated in the separator. Solids are separated downwards.
  4. The solids are collected in a sludge trap underneath the system that must be sucked off at location-specific intervals.
  5. The water flows upwards through a filter element.
  6. The filter cartridge is easy to replace.
  7. The cleaned water flows via the outlet into the storm sewer or a seepage system.

Video: Operating principle

The Hydrosystem Road Drain combines a hydrodynamic separator with a filter unit in a road drain and is simple to inspect and clean.

The system requires no additional space as it is located directly in the road space. The filter material is located in a cartridge that is exchanged at intervals of between 3 and 5 years.

The filter system removes pollutants such as heavy metals, mineral oil hydrocarbons and polycyclic aromatic hydrocarbons from the stormwater. Apart from that it binds nutrients such as phosphates. The combination of solids separator and filter works both on particles and on dissolved water ingredients.

The treatment plant can be used with traffic areas such as car parks and roads with all volumes of traffic. Three different filter cartridges are available for this. Even heavily contaminated stormwater runoffs can be cleaned to the extent that they can be discharged into surface waters or the groundwater. The modular design allows use in virtually all catchment areas.

Technical data

  • Internal diameter of the concrete or plastic shaft: > 0.4 m
  • Rectangular shaft forms are also possible
  • Depth of the outgoing pipe: > 60 cm
  • Connectable area: 100 m2 to 400 m2 depending on the degree of treatment level
  • Maximum flow rate: 15 l/s,
  • Maximum filtration capacity: 2 l/s
  • Three different filters are available, different cleaning capacities


Hydrosystem road train approvals
  • General building authority approval from the DIBt, Z-84.2-17
  • On the LANUV list in NRW
  • Tested according to requirements of DWA A 102

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