The humification of waste water sludge in constructed reed beds is a nature closed process for dewatering and advanced mineralisation. Because of big requested surfaced area, this process will be applicated in rural regions.

The properties of reed shall be of use as pertinent evaporation, favorable influence of soil structure through root system in the drying beds, which are planted with reed

The root network system penetrates the whole sludge body, breaks it up, takes care of aerobic states, and accelerates the soil formation.

The seepage water infiltrates through the soil layer and will be pumped back to the treatment plant.

Despite their technically undemanding nature, constructed reed beds need to be observed and tended carefully both.

The surface overflow rate in the aride regions can be based on 200-300 kg TS/(m².yr) for liquid sludge of aerobic treatment of wastewater That means, a specific load of drying beds is not to exceed 0,20 m²/p.and only 100 kg TS/(m².yr) for liquid sludge of anaerobic treatment of wastewater.