Stormwater treatment plant Multiple plants

1. The rainwater from the area to be drained is introduced at the lower end of the shaft of the rainwater treatment plant, and the water is deflected tangentially by a deflection aid.
2. Here, sedimentation of particles, especially of the sand fraction, takes place in a hydrodynamic separator due to turbulent secondary flows in a radial, laminar flow regime. In this way, solids are already retained here and the filters are effectively protected against colmation.
3. These are collected via an opening in the lower part of the cleaning shaft in a sludge trap under the system, the sludge trap is sucked out at intervals.
4. In the middle of the cleaning shaft there are 4 filter elements, with these filter elements the fines are filtered in the upflow process and a large part of the dissolved pollutants are adsorptively bound, the filter can be backwashed and in case of complete sludge formation it can be easily replaced. The design of the individual filters enables the operator to safely and sustainably maintain the material cycle.
5. The clean water is located above the filter elements. It passes through a light-matter barrier (in the event of an accident, larger quantities of oil and gasoline are retained (for example, in the event of an accident), "normally" occurring hydrocarbons are removed in the filter) and then flows through the drain into the seepage system or into the body of water.

1. Inlet rainwater (DN 200)
2. Diversion aid
3. Hydrodynamic separator
4. Sludge trap
5. Filter element
6. Removal aid for filter element
7. Maintenance tube
8. Light material barrier
9. Inlet rainwater storage tank, infiltration system or water body (DN 200)
10. Buoyancy protection for filter elements

Video: functional principle

Stormwater treatment system