Our non electric wastewater treatment plant effectively cleans sewage in three stages.
Raw sewage enters the primary chamber where sedimentation of the suspended solids occurs. Primary sludge sinks to the bottom where it decreases in
volume via anaerobic digestion. The remaining wastewater flows to the restriction outlet which leads to the bioreator for the second stage of treatment.
At the restriction outlet, buffering of the wastewater occurs. This ensures that an even flow of wastewater is forwarded to the bioreactor throughout the day, regardless of
any hydraulic peaks.
Wastewater treatment in the Non Electrical Bioreactor
The ClearFox Nature bioreactor is a system consisting of aeration elements and several sedentary media types stacked in order. There is a distribution device at the inlet to the bioreactor which consists of a compensator and perforated distribution boxes.
The restriction outlet from the primary chamber fills the compensator which then fills the distribution boxes in regular flushes. The wastewater drips through the holes at the bottom of the distribution boxes so that it will flow evenly through the sedentary media materials below.
With the introduction of air via natural ventilation, bacteria grow on the surface of the media to form a biofilm which cleans the wastewater by consuming the remaining
organic materials. We refer to this process as the cascaded plug flow, during which the water is entirely cleaned in only one go.
At the same time, the system will biodegrade and reduce any resulting secondary sludge. Residual volumes are extracted via the outlet. These, however, are far below legal provisions and are thus not considered problematic.
Unlike conventional biofilm plants, a secondary sedimentation tank is not required. This process technology is the first of its kind in a small sewage treatment plant.
Similarly, the system will not require replacement parts or material throughout its entire lifetime, if operated correctly. Consisting of fixed media and passive aeration units and balanced with a filling device responsible for catabolism, biomass distribution and flowrate – the materials of the system will always remain effective.
Ideal Treatment Plant for Remote Operation
As a result of the simple design and use of biofilm technology, this plant is ideal for decentralised or remote operation. One of the main advantages of the ClearFox® nature is extremely stable operation in underload as well as in overload conditions. Additionally,
Low maintenance – the plant does not contain any technical wear parts and will never require any replacement parts throughout its lifetime. Also, as a result of the reduction process the primary sludge needs less frequent disposal.
Quick start up – the plant reaches optimum cleaning performance within a very short time. You also have the option to enrich the support medium with enzymes in order to reduce this time even further.
Easy to install – if your site is not on an incline, we connect a pump shaft with pump downstream to lift the water to outlet height.
High quality effluent – a disinfection module can be installed downstream so that the clean effluent can be reused as raw water.
Low cost maintenance – by using filter bags in the primary chamber and composting the filter residue, conventional sludge disposal is not necessary.
Small Zero Electricity Sewage Treatment Plant – a detailed explanation
The ClearFox® nature is a small sewage treatment plant which uses a biofilm filtration process without electricity. It consists of a mechanical primary chamber and a bioreactor.
Non Electric Sewage Treatment Plant
The plant has a primary chamber where suspended solids in the wastewater (e.g. toilet paper) will sediment, compact and are stored. Daily hydraulic fluctuations are balanced out within the system.
Water flows automatically through the plant with no pumps necessary. Between the primary chamber and the bioreactor, the restriction outlet balances the flow of water.
The compensator flushes the mechanically clean wastewater into the distribution boxes where it drips evenly through the holes onto the medium.
Biological Cleaning Process
Bacteria that are naturally present in wastewater clean it by consuming the organic particles within it. The cleaning process is similar to that which occurs in rivers and streams, but is more concentrated. Bacteria need optimal conditions in order to grow sufficient in numbers to clean the wastewater effectively. The ClearFox® nature bioreactor contains different media with large surface areas to allow the bacteria to colonise and form a biofilm.
Bacteria also need oxygen to complete the cleaning process. The air supplies the oxygen to the biofilm by means of natural ventilation via an aeration pipe and a vent stack.
Low Residual Sludge Levels
Sludge is a by-product of the biological cleaning process. In the ClearFox® nature, it remains in the bioreactor where it is partially consumed by the bacteria, so that only residual volumes of sludge need removing. This is why a secondary sedimentation chamber – which separates the sludge from the cleaned wastewater in other systems – is not required. Residual volumes of suspended particles (sludge) are removed via the outlet, permissible in the legal provisions DIN EN 12566-3.