What does biological oxygen demand (BOD) measure?

What does biological oxygen demand (BOD) measure?

• A. The rate of photosynthesis in water
• B. The amount of dissolved oxygen used by microorganisms
• C. The concentration of pollution in water
• D. The volume of oxygen available in water

Answer: (B)

Biological oxygen demand (BOD) specifically measures the amount of dissolved oxygen that microorganisms consume while breaking down organic matter in a water sample over a specified period, usually five days. This indicator is crucial in assessing the organic pollution levels in water bodies, as higher BOD values suggest a greater presence of biodegradable material, which leads to a higher demand for oxygen by decomposing microorganisms. Understanding BOD is important for managing water pollution; it helps determine the effectiveness of wastewater treatment processes and the health of aquatic ecosystems. A high BOD indicates a greater degree of organic pollution, which can deplete oxygen levels in the water, adversely affecting aquatic life. Thus, BOD serves as a valuable metric for environmental scientists and public health officials monitoring water quality.

Biological oxygen demand (BOD) specifically measures the amount of dissolved oxygen that microorganisms consume while breaking down organic matter in a water sample over a specified period, usually five days. This indicator is crucial in assessing the organic pollution levels in water bodies, as higher BOD values suggest a greater presence of biodegradable material, which leads to a higher demand for oxygen by decomposing microorganisms.

Understanding BOD is important for managing water pollution; it helps determine the effectiveness of wastewater treatment processes and the health of aquatic ecosystems. A high BOD indicates a greater degree of organic pollution, which can deplete oxygen levels in the water, adversely affecting aquatic life. Thus, BOD serves as a valuable metric for environmental scientists and public health officials monitoring water quality.