What percentage greater than the highest expected dosage must disinfection equipment have as capacity?

The correct answer indicates that disinfection equipment should have a capacity that is at least 50% greater than the highest expected dosage. This requirement is in place to ensure that the disinfection system is capable of handling fluctuations in water quality and unexpected increases in demand. By having a capacity that exceeds the highest expected dosage by this percentage, the system can maintain effective disinfection even under challenging conditions, providing an additional safety margin to account for variables such as increases in pathogen load or changes in flow rates.

This additional capacity is crucial for ensuring compliance with public health and safety standards, as it helps to reduce the risk of insufficient disinfection, which can lead to waterborne illnesses. The guideline reflects best practices in water treatment facilities, emphasizing the importance of robust and reliable disinfection processes to protect public health.