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What is Pile Cloth Media Filtration?
Pile cloth media filtration is an innovative process developed specifically for tertiary wastewater treatment. Unlike conventional sand filtration, this technology employs textile filter media with a pile-like (floriform) surface structure.
Operating Principle
Wastewater flows through rotating filter discs, each covered with the pile cloth media. Filtration takes place from the outside in – solids are retained on the fabric surface, while the treated water flows inward and exits via the central hollow shaft.
Advantages over Conventional Technologies
- Up to 70% smaller footprint compared to sand filters
- Energy consumption below 0.01 kWh/m³
- Suspended solids (TSS) outlet values below 2 mg/l
- Automatic backwashing without interruption of operation
- Retrofitting into existing tanks is possible
- Backwash water volume is below 1%
Typical Applications
Cloth filters are predominantly used in municipal wastewater treatment plants, especially for:
- Tertiary filtration downstream of secondary clarification
- Phosphorus removal in combination with coagulant dosing
- Water reuse applications
- Industrial process water treatment
Conclusion
Pile cloth media filtration has established itself as a reliable and cost-effective alternative to traditional filtration methods. Its compact design, minimal energy requirement, and excellent effluent quality make it the preferred technology for tertiary treatment.