Screens and strainer remove solid contaminants from wastewater. These mechanical processes separate solid pollutants such as diapers, hair, and wet wipes from the wastewater stream. Before the treatment of industrial wastewaters, strainers separate textile fibers, paper labels, plastic residuals, and production residues such as potato peels and other scraps and wastes.

Depending on the area of application, coarse or fine screens are used. They clean the wastewater by means of parallel rods. Strainer feature grits, screens, perforations and meshes of varying sizes. Coarse strainer (> 20 mm) to micro (<0.05 mm) separate solid substances as large as human waste to as small as sand and tiny sludge particles from the wastewater stream.

Extremely important is the mechanical preliminary cleaning in the treatment of municipal wastewaters. Fibers suspended in the wastewater pose a particular challenge, especially the extremely tear-resistant textile fibers of wet wipes and non-woven materials. They tend to build up, potentially creating blockages and enormous damage to pumps and mixers.

DAS Environmental Expert works closely with its clients when choosing the right drum screens and self-cleaning screens to prevent damage to their treatment technology. This eliminates unnecessary maintenance from the outset and saves costs.



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