What is a major concern regarding organic substances in wastewater?

Organic substances in wastewater are a significant concern primarily because they can contribute to pollution. When organic matter is present in high concentrations, it can lead to several environmental issues. For instance, as bacteria break down these organic materials, they consume dissolved oxygen in the water, which is essential for the survival of aquatic life. A decrease in oxygen levels can result in adverse effects on fish and other organisms, leading to die-offs and reduced biodiversity.

Moreover, the decomposition of organic substances can generate odors, the presence of pathogens, and other harmful byproducts that further degrade water quality. Therefore, managing organic substances effectively in wastewater treatment processes is crucial to minimizing their potential pollution impact and protecting both the environment and public health.