Metro Water Services (MWS) operates a biosolids recovery facility, which receives biosolids/sludge from MWS’s adjacent Water Reclamation Facility (WRF) in downtown Nashville, Tennessee. The existing biosolids recovery facility was commissioned in 2008 and converts sludge into Class A Biosolids through anaerobic digestion and thermal drying, among other processes. Working alongside MWS, Smith Seckman Reid (SSR) was the Engineer of Record designing improvements to the existing four (4) anaerobic digesters. The major project scope items consisted of installing new draft-tube sludge mixers (which replaced the existing pumped recirculation system), new fixed covers, new progressing cavity pumps, new roof spray-foam insulation, and applying new interior and exterior coatings to the digester tanks. Due to process constraints, the implementation of the project necessitated performing the improvements one digester at a time. The project construction began in 2016 and will be completed in spring 2025. Key topics of this presentation will include selection of durable, chemically resistant epoxy coatings and implementation of the coating for the interior and exterior of the four (4) digesters. The discussion highlights the essential role of surface preparation, adherence to industry standards, and maintaining environmental conditions—such as temperature and humidity management, flash rust prevention, and contaminant control—are explored as critical factors influencing coating success. The presentation also underscores the importance of safety measures, inspection protocols, and quality control procedures like thickness measurement and holiday testing to verify proper application. Like all coatings applied in harsh environments, this project had its own unique set of challenges to overcome. This presentation aims to highlight the challenges faced, like maintaining acceptable application conditions, and detail the means to overcome these challenges. The audience will walk away with a better understanding of the selection and application process for coatings in harsh wastewater environments (particularly digesters) while also increasing their knowledge on safety and quality control measures for future projects.