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After the dissolved pollution load has been converted into a solid pollution load in the biological stage, the resulting excess sludge must now be separated from the purified water.
The classic gravity separation method is well-proven. Particles of the biofilm that formed on the biodiscs settle as sludge. The particles formed using RIB are highly compact and settle faster compared to sludge from classic aeration systems.
As a compact system with integrated sedimentation tank, System S&P lamella separators have proven to be a cost-effective alternative to a conventional secondary sedimentation basin.
Their special design enables an extremely compact construction, requiring only around 20% of the surface area needed for a conventional secondary sedimentation basin. In addition, standardised assembly guarantees a high level of quality.
System S&P lamella separators can also be used in intermediate treatment steps and many different technical operations.
Alternatively, maturation ponds and planted soil filters may be used.
Depending on the requirements, classic filtration processes such as sand filters, disc filters or rotating filters may also be added.
Excessive levels of phosphorus and the resulting eutrophication have become a global issue, especially in a European context in areas with intensive agricultural activity. Phosphorus can be removed from the water by means of chemical precipitation at various stages of the process.
Depending on the effluent results required, additional specialised processes can be added, such as the Fenton process or activated carbon adsorption.
In the area of sludge treatment, System S&P uses common market-proven methods, from stabilization to drainage.