mode of operation

Rotter | Primary Treatment

The performance and especially the service life of natural waste water treatment facilities depend mainly on the type and reliability of the primary treatment.The mechanical primary treatment separates the suspended solids from the waste water and projects the planted land filter from accumulation of silt.The rotter system is a traditional and simple but at the same time, extremely effective and advantageous primary treatment method.To prevent putrefaction the decomposing solids we aerated, this means no offensive smells. Putrefaction, as seen in common sedimentation tanks, has a negative effect on the whole process and is there fare neither efficient nor ecologically advisable.One function of the rotter is the separation of the suspended solids from the waste water. Additionally, organic material is degraded by 60% - 80%. The bio-filter effect increases oxygenation, which is important for the micro-organisms living in the rotter and hence for the composting process.The end product delivered by this process is not sludge, as from traditional waste water treatments, which needs to be removed and disposed of (resulting naturally in additional costs) but compost which can be used in the garden, for example.

Multi-functional Shaft | Batch feeding

After the mechanical primary treatment the waste water flows into the multi-functional shaft, where the suspended solids and fats are separated. Then the water overflows into the next shaft where it is collected to be spread in batches over the ground filter.

Planted Ground Filter | Main Treatment Stage

As the waste water flows through the ground filter, it is on the one hand mechanically filtered and on the other cleaned by the micro-organisms living in it.
The interaction of the soil substrate, plants and micro-organisms result in several physical, chemical and biological elimination processes.
The actual cleaning activity is provided by the micro-organisms. The plants serve to structure and aerate the bed, maintaining and improving the bacteria´s habitat.

Final Treatment and Disposal of Treated Water

The treated water is either fed into a flowing body of water (river, stream…) or, if such is not available, it is soaked away (dependent upon pertinent local water and waterways laws).