Smarter Oxidation, Lower Dose: A Data-Driven Evaluation of JC 9465

Abstract
Persistent microbiological fouling in open-recirculating cooling systems drives excess chlorine demand, equipment fouling, and operating cost. In a 100 000 gpd power-plant cooling tower in Oklahoma, elevated heterotrophic plate counts (>105 CFU/mL) persisted through summer despite continuous feeding of ~225 gal day?¹ of 12.5 % sodium hypochlorite. The facility transitioned to a mineral-oxychloride biocide (JC 9465) dosed three times per week at 45 gal per application. All other operating parameters remained constant. Over a ten-week evaluation, total treatment cost declined by roughly 45 %, while microbiological counts fell below 10² CFU/mL and ATP levels confirmed sustained low bio-load. Corrosion coupon results remained within industry norms, and visual inspection showed noticeably cleaner fill and metal surfaces. Statistical comparison of baseline and intervention data demonstrated a ≥ 2-log reduction in microbial population with a fraction of the oxidant mass applied. The study indicates that the stabilized mineral-oxychloride provided greater oxidative efficacy and residual persistence than conventional hypochlorite under high-pH, high-organic summer conditions. These findings suggest mineral-oxychloride chemistry can achieve superior biofilm control and measurable cost savings in industrial cooling operations.