Which of the following is an advantage of the COD test over the BOD test?

The advantage of the COD (Chemical Oxygen Demand) test over the BOD (Biological Oxygen Demand) test is that it only takes a few hours to complete, typically ranging from two to three hours. This rapid turnaround is particularly beneficial in wastewater treatment processes where time is of the essence for decision-making and operational control.

In contrast, the BOD test usually requires a duration of five days for incubation, which can delay treatment adjustments or operational responses. The faster COD test allows operators to get timely data, enabling them to make more immediate decisions regarding treatment processes and management of the wastewater system.

The faster completion time is a significant operational advantage, particularly in managing wastewater treatment facilities where quick assessments can lead to improved efficiency and compliance with regulatory requirements.