Maximizing Operations Efficiency for Wastewater Utilities: Consolidation Evaluation for the City of St. Petersburg

摘要

To maximize operations efficiency, the city of St. Petersburg, Florida, wanted to investigate thernfeasibility for reducing their current water reclamation facilities from four to three. The existingrnAlbert Whitted Water Reclamation Facility is the smallest and oldest of the city’s four waterrnreclamation facilities. Required capital expenditures at AWWRF include construction of a newrn26.5-million-liter (7.0-million-gallon) reject water storage tank, which would need to be locatedrnat a remote location. As an alternative to the additional costs that would be incurred to keeprnAWWRF in service, the city contracted with CDM to evaluate alternatives to the continuedrnoperations and maintenance of the aging facility. The objective of the evaluation was to providerna present-worth analysis based on marginal cost for keeping AWWRF in service, versus twornalternatives for flow diversion and treatment if the plant were taken out of service. The flowrndiversion alternatives included installing a master pump station in proximity to AWWRF andrnnew force main(s) that would discharge to the other treatment facilities.