FDEP Water Treatment C Practice Exam

Activated carbon is widely used in water treatment processes to remove contaminants and improve water quality. The two primary forms of activated carbon used in this context are Granular Activated Carbon (GAC) and Powdered Activated Carbon (PAC).

Granular Activated Carbon is composed of granules that are larger and generally used in fixed bed filters. Its larger surface area allows for effective adsorption of organic compounds, chemicals, and particulates over extended contact times. This makes GAC particularly suitable for processes where prolonged exposure is possible, such as in municipal water treatment facilities.

On the other hand, Powdered Activated Carbon consists of much smaller particles and is often used in situations where a quick adsorption process is required, such as in batch treatment or in situations that require immediate response to contamination events. PAC can be added directly to the water and is then removed by sedimentation or filtration, allowing for rapid reduction of specific pollutants.

Understanding these two forms and their applications is crucial for effective water treatment management, as the choice between GAC and PAC depends on specific treatment goals, contact time, and operational parameters.