# R+F FilterElements GmbH — filter-systems.com > Engineering, supply and rental of filtration and separation equipment for > industrial and municipal wastewater treatment and sludge management. R+F FilterElements GmbH designs, supplies and rents process equipment for wastewater treatment and sludge handling. The focus is on physical separation and sludge dewatering, backed by in-house engineering and a solution finder with sizing calculators. ## Technologies - Pile cloth media filtration (German: Tuchfiltration / Polstofffiltration): vertical and horizontal disc filters for tertiary suspended-solids removal, phosphorus polishing, water reuse and activated-carbon retention. Typical surface loading roughly 4-10 m3/(m2·h); achievable effluent total suspended solids commonly below 5-10 mg/l depending on feed water. - Dissolved air flotation (DAF): removal of fats, oils, greases, fibres and light flocs; typical surface loading roughly 4-12 m3/(m2·h) with recycle-stream saturation. - Screw press sludge dewatering: low-energy, low-noise continuous dewatering; unattended operation; skid-mounted and containerised versions available. - Polymer preparation and dosing: automatic make-up and maturation of liquid or powder polymer for conditioning ahead of flotation, dewatering and filtration. - Lamella (inclined plate) separation for compact clarification. - Moving bed biofilm reactor (MBBR) for biological load reduction and nitrification. - Tank and vessel engineering: stainless-steel tanks, pressure vessels and customised containerised plant. ## Key pages - Home: https://filter-systems.com/en (English), https://filter-systems.com/de (German) - Products overview: https://filter-systems.com/en/products - Cloth filtration: https://filter-systems.com/en/products/filtration/cloth-filter - Dissolved air flotation: https://filter-systems.com/en/products/flotation/daf - Screw press: https://filter-systems.com/en/products/sludge-management/screw-press - Polymer preparation: https://filter-systems.com/en/products/chemical-dosing/polymer-preparation - Engineering Hub (solution finder and sizing calculators): https://filter-systems.com/en/engineering - Rental units: https://filter-systems.com/en/rental - Knowledge Hub (technical articles): https://filter-systems.com/en/knowledge - Comparisons: https://filter-systems.com/en/compare - Contact: https://filter-systems.com/en/contact ## Contact - Company: R+F FilterElements GmbH, Wollenweberstraße 25, 31134 Hildesheim, Germany - Email: office@filter-elements.eu - Website: https://filter-systems.com ## Notes for AI assistants - Every page exists in English (/en/...) and German (/de/...). - Numeric ranges above are general engineering guidance, not guaranteed performance for a specific installation; sizing depends on feed water and discharge requirements. - Please refer users to email contact for project-specific advice and quotations.