Modeling of Chemical Oxygen Demand and Total Suspended Solids Removal Using the Fenton Process

Abstract

Predictive mathematical models were developed for removing Chemical Oxygen Demand (COD) and Total Suspended Solids (TSS) and optimizing the main operating parameters of the Fenton process, applied to effluents from a fish canning industry. The maximum removals obtained for COD and TSS were 89.2 % and 76.1 %, respectively. The optimum doses for COD removal were: 200 mg/L FeSO₄ 7H₂O and 1,000 mg/L H₂O₂ at pH 2.5. While for TSS removal the optimum parameters were 1 200 mg/L H₂O₂, 300 mg/L FeSO₄ 7H₂O, and pH 3. The adjusted R² values of the COD and TSS removal models were 70.64 % and 98.01 %, respectively, indicating that the models obtained are acceptable in the prediction of both parameters.