What does BOD5 measure in wastewater and why is it important?

• A. It measures inorganic contaminants present in wastewater and predicts chemical dosing.
• B. It measures the amount of biodegradable organic matter consumed by bacteria in five days and helps predict aeration requirements.
• C. It measures only non-biodegradable organics.
• D. It measures viral content of wastewater.

Answer: (B)