While in the early stages of the development, the developers were interested in creating a wastewater treatment and reuse system that could scale up as the community continued to expand.
The King’s Point Cove Project needed a solution that could handle wastewater flows that were highly variable. Given peak times created by events at the clubhouse and tournaments on the course, the current system would get overwhelmed. Additionally, with a small number of homes on the collection system to start, a traditional activated sludge proved too difficult to operate effectively. Thus, the Active Water Solutions Packaged system was chosen for its ease of operation, and its resiliency in the face of variability.
The effluent criteria for this project include 5 mg/L for BOD, 12 mg/L for TSS and 3 mg/L for NH4-N. The design for the initial phase was developed to treat 15,000 gpd, and was built in a single 53’ high cube shipping container. Due to the permit requirements, and intended reuse, tertiary filtration was also included for effluent polishing.
The treatment system was designed as a submerged fixed-bed biofilm reactor (SFBBR), which incorporated a specifically-calculated fixed-film surface area submerged in the aeration basins (i.e. bioreactors). The process train is simple and includes an influent fine screen, two aerobic bio-reactors, clarification, disinfection, and tertiary filtration. A sludge holding tank was also integrated into the self-contained system.
Simplicity and biological stability are the core benefits of the King’s Point Cove system. Considering the required low BOD effluent, and additional nitrification requirements, the SFBBR’s biofilm-based treatment process allows for a more complete carbon oxidation and improved autotrophic bacteria proliferation. Biofilms are highly self-regulating in accordance with pollutant concentrations, thereby omitting the need for a RAS process in most cases. Therefore, the operator does not have to be concerned with balancing F:M ratios or varying quantities of wasted versus returned sludge.
The development at King’s Point Cove is an ideal example of what happens when science and design work together to make wastewater treatment and reuse seamless and environmentally friendly.
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