Estimation of ozone dosage and residual ozone for effective wastewater treatment

Ozonation has emerged as a promising technology for wastewater treatment due to its potent oxidizing properties, which enable the degradation of recalcitrant organic pollutants and improve effluent quality. This study explores the estimation method for the optimum ozone dosage and residual ozone for effective wastewater treatment and investigates its efficiency in reducing organic pollutants and improving treated effluent quality. The primary focus was on the effects of ozonation on Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), color, and residual ozone concentrations. Ozone was generated using an ozone generator with a 5% concentration and applied to wastewater samples for various contact times. The results revealed significant reductions in COD up to 42.9% and BOD up to 44%, demonstrating ozone's strong oxidative capability. Ozonation also led to an impressive 98% color removal. The study confirmed that ozonation is highly effective in achieving a superior level of disinfection, proving to be a sustainable technology capable of meeting stringent treated water quality standards. Further optimization of operational parameters can enhance the efficiency and cost-effectiveness of ozonation for large-scale wastewater treatment applications.