Medina County Sanitary Engineers (MCSE) is soliciting Statements of Qualifications (SOQ) from qualified engineering firms to provide BioWin process modeling services for the Liverpool Wastewater Treatment Plant (WWTP). The purpose of this request is to evaluate existing treatment processes and determine whether operational or process modifications are required to reliably treat current and projected wastewater loadings. The modeling effort will address hydraulic, organic, inorganic, nutrient, and chemical loading conditions under both dry-weather and wet-weather scenarios. The results of this work will be used by MCSE to support operational decision-making, regulatory compliance, and future capital planning. Liverpool WWTP is a complex, multi-stage activated sludge facility with advanced nutrient removal and solids handling processes. Major liquid treatment processes include preliminary treatment with bar screening and grit removal, primary clarification using chain-and-flight clarifiers, secondary biological treatment incorporating bioaugmentation for nitrification, denitrification and anoxic zones, swing zones for Enhanced Biological Nutrient Removal (EBNR), secondary final clarification, tertiary treatment using rapid sand filtration, and chlorine disinfection. Solids handling facilities include raw sludge and waste activated sludge thickening, centrifuge pre-dewatering and final dewatering, phosphorus removal prior to dewatering, thermal hydrolysis, anaerobic digestion, and a return activated sludge (RAS) fermenter supporting EBNR. Wet weather treatment facilities include multiple storm tanks and a storm sand filter.
