Texas Commission on Environmental Quality (TCEQ). Class C Water License Exam

What is activated carbon primarily used for in a surface water plant?

1. Filtration of large particles

2. Taste and odor control

3. Removal of sediments

4. Chemical disinfection

The correct answer is: Taste and odor control

Activated carbon is primarily used for taste and odor control in a surface water treatment plant. It is highly effective due to its large surface area and porous nature, which allows it to adsorb a wide range of organic compounds, including those that contribute to unpleasant tastes and odors. By binding these compounds to its surface, activated carbon enhances the overall quality of drinking water, making it more palatable for consumers. The role of activated carbon is particularly important in surface water treatment, where organic materials from natural sources can influence the taste and smell of water. By using activated carbon in the treatment process, water treatment facilities can significantly improve the sensory quality of the water. Filtration of large particles primarily involves processes such as screening and sedimentation rather than the use of activated carbon. The removal of sediments is typically managed through physical processes like clarification, and chemical disinfection refers to the addition of chemical agents, such as chlorine or ozone, to kill pathogens in the water rather than using activated carbon, which does not have disinfection properties.