Activated Carbon Filtration is an advanced adsorption process widely used for the removal of dissolved organic compounds, residual chlorine, odor, color, taste-causing substances, and trace chemical contaminants from water and wastewater. Even after primary and secondary treatment processes, water may still contain dissolved pollutants that affect water quality and usability. Activated carbon filtration provides an effective polishing stage by utilizing the extremely high surface area and adsorption capacity of carbon media to capture and retain these contaminants.

The filter typically consists of a pressure vessel filled with granular activated carbon (GAC) supported by graded gravel layers. Activated carbon is produced through the activation of carbon-rich materials such as coconut shells or coal, resulting in a highly porous structure with millions of microscopic pores. As water flows through the carbon bed, contaminants are removed through adsorption, a process where dissolved organic molecules attach to the surface of the carbon pores due to physical and chemical attraction forces.

During operation, suspended solids and organic compounds gradually accumulate within the carbon bed. To maintain effective filtration performance, the system periodically undergoes backwashing, which expands the carbon media bed and removes trapped particles. Over time, the adsorption capacity of the carbon media decreases and the media must be replaced or regenerated to restore full treatment efficiency. Proper operational control ensures long service life and consistent removal performance.

Avlon’s Activated Carbon Filter systems are engineered with high-strength pressure vessels, premium-grade carbon media, optimized underdrain systems, and automated backwash control mechanisms for reliable operation and low maintenance. These filters are commonly installed as the final polishing stage following treatment units such as Lamella Clarifiers, Dissolved Air Flotation systems, and biological reactors. With extensive experience in designing water and wastewater treatment plants, Avlon provides robust ACF solutions that ensure improved water quality and compliance with DENR discharge standards and industrial water reuse requirements.