What is the primary goal of tertiary treatment in wastewater management?

• A. To remove pathogens from the effluent
• B. To remove dissolved and suspended solids
• C. To neutralize harmful chemicals
• D. To prepare effluent for disposal

Answer: (B)

The primary goal of tertiary treatment in wastewater management is particularly focused on enhancing water quality beyond the primary and secondary treatment stages. Tertiary treatment effectively targets the removal of remaining dissolved and suspended solids that may not have been adequately eliminated earlier in the treatment process. This stage is crucial because it helps to improve the overall clarity and purity of the water before it is either discharged into the environment or reused for various purposes.

While the removal of pathogens, neutralization of harmful chemicals, and preparation for disposal are important aspects of wastewater management, they play a more prominent role in earlier treatment stages or specific processes. For instance, pathogen removal is a key objective of secondary treatment, while neutralization usually occurs in earlier phases before final polishing stages. Tertiary treatment acts as a polishing step, ensuring that the treated effluent meets high-quality standards, especially if it is to be reused for irrigation or replenishing water bodies.