NEHA Wastewater Practice Test

The goal of nutrient removal in wastewater treatment is to prevent eutrophication in receiving waters. Eutrophication occurs when excess nutrients, particularly nitrogen and phosphorus, are introduced into aquatic ecosystems. This leads to algal blooms, which can deplete oxygen levels in the water and harm aquatic life, resulting in negative impacts on water quality and aquatic ecosystems. By removing these nutrients before the treated wastewater is discharged into receiving bodies of water, treatment facilities can help maintain ecological balance and improve the health of these environments.

Enhancing water temperature is not directly related to nutrient removal. Increasing pathogen levels is counterproductive to the goals of wastewater treatment, as treatment processes aim to reduce pathogens to protect public health. Reducing treatment time may be a goal in some contexts, but it does not specifically address the critical issue of nutrient management in effluents. Therefore, the primary aim of nutrient removal is indeed to mitigate the risks associated with eutrophication.