Optimizing Sewage Collection Methodologies to Minimize Cost and Maximize Nutrient Removal

The state of Florida has been active in preserving and restoring the state’s water bodies. Part of this effort has included identifying pollutants and their sources. Accordingly, the state of Florida has identified total nitrogen (TN) as the main source of nutrient pollution and onsite sewage treatment and disposal systems (OSTDS), more commonly known as septic tanks, as a major source for TN. As a result, the state has enacted regulations to limit and reduce OSTDSs and has provided funding for sewer system expansions to aid in this objective. Utilities today are facing a challenge of expanding their sewer collection systems into partially or fully built-out areas currently served by OSTDS units. A key component of this challenge is selecting the correct sewer collection system for the existing and developed project area that will minimize impacts. This paper summarizes the challenges and advantages associated with vacuum sewer collection systems in meeting the state’s nutrient reduction goals.