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.