Wastewater Treatment Plants
The Stone County Public Sewer District needed a wastewater plant on a limited budget and with a limited footprint to be constructed while the existing plant remained fully functional. Client benefits included the planning and design enhanced biological nutrient removal, construction coordination and design aspects to avoid conflicts with new improvements and existing operations, accommodation of limited space requirements and solutions unique to the owner’s needs, a reduction of construction, energy, biological phosphorus reduction with chemical feed trimming and tertiary filtration to consistently and cost-effectively meet effluent P limits of 0.5 mg/L, and a BNR mode to enhance bio-P reduction, reduce aeration energy costs, and improve the quality and performance of the biomass.
Crossland Heavy Contractors was under contract with Stone County Public Sewer District #1 to construct a new 150,000 GPD wastewater treatment facility and upon completion of the initial contract, Crossland Heavy was given a change order to add a separate sludge holding structure, convert the previous sludge holding tank into a their SBR and add a second disk filter to increase capacity to 225,000 GPD. Crossland Heavy completed both phases on a limited timeline, while the existing plant remained fully functional.