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A Salsnes Filter system combines three critical processes into one compact unit – solids separation, sludge thickening and dewatering. The rotating filtermesh removes >50% TSS, and >20% BOD from effluent and produces drier sludge (20-30% dry matter). It’s the only filter design that can replace conventional primary treatment and fulfill the EU regulations on primary treatment.
A Salsnes Filter system combines three critical processes into one compact unit – solids separation, sludge thickening and dewatering. The rotating filtermesh removes >50% TSS, and >20% BOD from effluent and produces drier sludge (20-30% dry matter). It’s the only filter design that can replace conventional primary treatment and fulfill the EU regulations on primary treatment.
To save space and money, the enclosed SF systems contain an integrated sludge thickening and dewatering process. Typical dewatering results are 20–30% DM. For larger installations, a stand-alone dewatering unit is available (shown below) to dewater sludge from multiple filters. It applies higher pressure to produce even drier sludge (20 –40% DM typical).
The Programmable Logic Controller (PLC) automates the system, making it ideal for remote or unstaffed locations. A sensor tells the PLC when to initiate filtermesh rotation which then automatically starts the Air Knife filtermesh cleaning system and sludge dewatering. The panel is rated IP65 and is located by the filter unit. Optional remote/control is available.
The built-in Air Knife is a patented filtermesh cleaning system that automatically cleans the rotating filtermesh using a blade of compressed air. Compared to scrapers, brushes or water-based cleaning systems, air is gentler on the mesh to prolong its life and keeps sludge drier for more effective dewatering.