Approximately what percentage of the dissolved solids in wastewater are organic?

The correct answer is that approximately 12% of the dissolved solids in wastewater are organic. Understanding this percentage is essential for wastewater treatment facilities, as it reflects the composition of the wastewater being treated. Organic dissolved solids primarily come from human waste, food waste, and other biodegradable materials.

In wastewater analysis, recognizing the proportion of organic matter is crucial because these compounds are a significant focus for biological treatment processes. Wastewater treatment plants often utilize biological treatment methods that rely on microorganisms to break down these organic materials, making it important for operators to understand their concentration in the influent stream.

While other percentages could suggest different configurations of wastewater contents, they do not accurately reflect average organic loadings seen in typical wastewater scenarios. Thus, the 12% figure aligns more closely with empirical data regarding the organic composition of dissolved solids in wastewater, providing a reliable basis for treatment process design and operational decisions.