CUET Preparation Today
What does a high Biochemical Oxygen Demand (BOD) indicate about wastewater? |
It has low levels of organic pollution It contains a high concentration of biodegradable organic matter It is safe for direct release into water bodies It has been adequately treated |
It contains a high concentration of biodegradable organic matter |
The correct answer is Option (2)- It contains a high concentration of biodegradable organic matter A high Biochemical Oxygen Demand (BOD) in wastewater indicates that it contains a high concentration of biodegradable organic matter. BOD measures the amount of dissolved oxygen required by aerobic microorganisms to break down organic substances in water. When BOD levels are elevated, it signifies a substantial presence of organic pollutants, which can lead to oxygen depletion in aquatic environments, adversely affecting aquatic life. Therefore, wastewater with high BOD levels necessitates adequate treatment before being safely discharged into natural water bodies. |
