How are suspended solids expressed in terms of Population Equivalent?

Population Equivalent is a metric used to quantify the organic and inorganic load in wastewater treatment, particularly in relation to suspended solids. It defines the burden presented by the population, typically expressed in terms of specific weights of suspended solids per person per day.

The correct answer indicates that suspended solids are expressed as 0.2 pounds per person per day. This figure has been established based on typical values observed in municipal wastewater treatment systems, reflecting the average contribution of suspended solids from an individual. This standard is essential for engineers and operators when designing systems to ensure that they can effectively manage and treat the expected load from the population served.

The other values presented may not accurately characterize the average contribution from a single person, which is why they are generally considered inappropriate in this context. Understanding these standards helps ensure that wastewater treatment facilities are adequately designed to handle the expected volume of suspended solids associated with their service population.