High-rate filtration requires a filter bed that can handle substantial water flow while continuing to retain suspended particles effectively. Anthracite Filter Media is widely used in dual-media and multimedia filters because its lower density allows relatively coarse anthracite to remain above denser sand during filtration and backwashing. This arrangement can provide greater depth for particle…

Activated Carbon is widely used in water treatment because its highly porous structure provides a large internal surface area for adsorption. However, activated carbon is not available as one universal grade. Different grades are manufactured with different raw materials, pore structures, particle sizes, surface areas, and adsorption characteristics. These differences influence how effectively a particular…

A properly designed underdrain system is an important part of a granular water filtration unit. While the upper filter media performs much of the particle-removal work, the underdrain is responsible for collecting filtered water and helping distribute backwash water across the filter bed. Filter Media Gravel is often used between the underdrain arrangement and the…