Granular Activated Carbon Filtration

Activated carbon works via a process called adsorption, wherein a highly porous pattern in the granulated carbon media adsorbs and entraps contaminants from the water. The contaminant particle is diffused into a pore and becomes adsorbed. The higher the contaminant concentrations, the greater the removal capacity of the activated carbon; however, it may require longer contact time with the media. The same operation principle as the Multimedia Filter is applied to Activated Carbon Filter. Water flows from the top of the vessel passing through the activated carbon bed, treated water is collected from the bottom, and backwash is initiated once the pressure drop increases or the filter's efficiency declines.