100% Stainless steel
The machine is entirely built in stainless steel, to ensure efficiency over the years of operation.
Maximum efficiency in primary treatment
Primescreen® is a completely self-cleaning conical disk filtration system which replaces traditional primary clarification in a fraction of the footprint and cost. Unlike other primary filtration systems, Primescreen® does not require compressed air, hot water or continuous back washing, vastly improving efficiency and making for a much simpler machine to maintain and operate. The installation of Primescreen®, thanks to its innovative technology, allows the plant to obtain immediate energy savings due to the reduction of Total Suspended Solids, BOD and COD, decreasing the load on the biological system, decreasing aeration requirements.
The main feature and the uniqueness of Primescreen® has a specific name: Dynamic Tangential Filtration®.
Basically, the wastewater crosses the rotating filtration surface tangentially instead of orthogonally, as it does in the other filters. This guarantees a great advantage over other static filtration technology. The angle of incidence between the influent and the filtering media, combined with the continuous rotation of the disks, allows for a higher efficiency separation of the micro particles contained in the wastewater.
The 50 microns diameter solid particle, is able to pass through the mesh, whose diameter is the same as the particle's.
The inclination to the water flow crossing surface keeps the 50 microns diameter particle from crossing the mesh.
The technological heart of the Primescreen® is based on one or more pairs of parallel conical disks in continuous rotation on which the filtering media is fixed. The influent flows inside the pair of disks through specially designed ducts, and the continuous rotation of the disks causes the Dynamic Tangential approach of the filtering media towards the water.
The rise of the water level is the "driving force" that leads the water itself to pass through the filtering media, on the surface of which remains the retained solids, that progressively increase the resistance to the passage. The clean filtering mesh in its rotation, is immersed in the solids suspension to be filtered and in this phase occurs the separation of solids from the water. As the water passes the filtration mesh, fibers and other material are retained between the disks.
The solids accumulate inside the conical disks, creating a mass of fibrous screened material, which serve to self-clean the mesh as these solids tumble between the rotating disks through adherence. (An easy way to envision the self-cleaning is to think of a snowball gaining mass as it rolls down a hill collecting more snow with every rotation.) The solids dewater during this stage as they tumble between the disks, and they are discharged automatically as the mass between the disks continues to build as the influent water is filtered.
Almost unlimited duration.
Almost unlimited duration.
Lower energy consumption costs and lower operating and maintenance costs due to lower complexity.
Lower energy consumption costs and lower management and maintenance costs due to lower complexity.
Absence of noise.
No odors and consequently no energy consumption or maintenance required for operating and aspiration system.
Dramatically lower energy consumption.
Greater installation flexibility.
Eliminates the worry of an overflow due to the failure of an actuated valve or during a power outage.