Located near the Gulf Shores of southern Alabama, the City of Foley is a coastal community with Southern charm. The area is a popular destination noted for its easy access to recreational water activities, top-rated golf courses, and quaint historic downtown. Due to the region’s reliance on healthy bodies of water, the utility’s primary mission is to serve as stewards for the area’s dynamic aquatic environment.
The Riviera Utilities Wastewater Treatment Plant at Wolf Creek serves its community of approximately 20,000 residents and had been operating a biological treatment system consisting of a 35-year-old extended aeration oxidation ditch process. The plant was rated for 2.0 MGD and needed to expand capacity to 3.5 MGD due to growing demand. Instead of taking the traditional approach of adding an additional oxidation ditch to increase treatment capacity, Riviera Utilities had the desire to “future-proof” the plant and prepare to meet more stringent effluent requirements, including Biological Nutrient Removal (BNR) that were anticipated to be enacted in the future. For these reasons and others, Aerobic Granular Sludge (AGS) technology was the treatment process selected to achieve these goals.