Poultry slaughterhouse wastewater treatment using nanobubble technology

Abstract

This study investigates the enhancement of aerobic treatment of poultry slaughterhouse wastewater (PSW) using nanobubble (NB) technology. Three aeration methods, i.e. air-NB, ozone-NB, and air-NB combined with Ecoflush enzymes were evaluated for removing chemical oxygen demand (COD), total suspended solids (TSS), NH3-N, total nitrogen, and fats, oil, and grease (FOG). Air-NB and ozone-NB achieved over 80% COD removal within 2 h, while NBs with Ecoflush enzymes initially showed lower removal rates but reached 99.5% FOG removal after 6 h. TSS removal efficiency remained steady across all methods after 4 h, with ozone-NBs performing best. Ammonia removal was most effective with NBs and Ecoflush enzymes, achieving 99% removal after 6 h. Both ozone-treated NBs and NBs with Ecoflush enzymes showed notably high FOG removal. The findings demonstrate that NBs can enhance mass transfer in wastewater treatment, making them an effective method for improving pollutant degradation in PSW.