ClearFox® nature is a small sewage treatment plant pre-assembled at the factory and tested according to the European standard 12566-3 and 12566-6. The connection size ranges from 1 to 16 residents.
The water from the outlet can seep away, be directed into an outlet channel or be returned for raw water treatment.
In case of sufficient incline, the plant can be operated without power, i.e. without power connection.
ClearFox® nature: Small sewage treatment plant without power requirement
Stage 1, the pre-chamber
Cleaning is done in three stages. The raw wastewater is led into the pre-chamber. The wastewater is sedimented and buffered. Primary sludge will sink to the ground and will reduce its volume by digestion in the absence of air. At the outlet of the pre-chamber, the water is hydraulically restricted and backed up, if required. Independent of hydraulic peaks, the mechanically cleaned wastewater is distributed evenly over the entire day and forwarded to the bioreactor downstream.
Stage 2, the bioreactor
The bioreactor consists of a system with aeration elements and sedentary medium which are arranged above each other in a certain order. On the surface of the bioreactor, there is a distribution device consisting of compensator and distribution soil. The restriction outlet from the pre-chamber fills the compensator which drains the water in one flush onto the distribution soil. The wastewater will enter the support medium system below and flow from the top to the bottom.
Stage 3 the support medium system
On the sedentary medium, bacteria colonises to clean the water. Due to the so-called cascaded plug flow, the water will be entirely cleaned in only one go. At the same time, the secondary produced sludge is reduced in volume and biologically degraded.
The remaining volume is led out through the outlet and is far below any legal provisions.
Process technology or small sewage treatment plants
Due to this process technology which is used for the first time in a small sewage treatment plant, a further secondary sedimentation tank (such as in conventional biofilm plants) is not required. The system consisting of support medium is balanced with its filling device concerning catabolism, bio mass distribution and rinsing effect.
This is the reason why the support medium does not need to be cleaned or replaced as in bio filter plants, but is effective absolutely without any changes for the lifetime of the plants, if they are operated properly.
Due to its simple structure and the used biofilm technology, the plant is well suited for decentralised operation. The main features are a very stable operation (underload, overload) and enormous cost savings in the long run, due to fewer technical parts and low disposal costs.
Generally, the plant reaches the required cleaning performance within a very short time. Optionally, the support medium can be enriched with enzymes in order to speed up the start-up time.
If the incline is insufficient for operation without power requirement, we offer an energy module incl. a mini-pump which lifts the cleaned water to outlet height without maintenance. Alternatively, the mini-pump can be connected to the power grid.
If the cleaned water is used as raw water, a disinfection module can be installed downstream.
By using filter bags in the pre-chamber and composting the filter residue, conventional sludge disposal is not necessary.
Test of effectiveness according to EN 12566-3 use for:
- Wastewater from households
- Weekend houses
- Holiday resorts
- Mountain huts
- Tourism industry
- Cost effective
Development of this innovative small sewage treatment plant was supported by
the Bavarian Ministry for Economics, Infrastructure, Traffic and Technology.
- Evens out hydraulic peaks
- Nurture zones for sludge absorption
- Plug and play
- Biofilm suitable for underload and overload
Reliable, safe and clever…
Due to the ClearFox® nature biofilm