Treatment wastewater of slaughterhouses through technology advanced oxidation: fenton process

The objective was to evaluate the application of the Fenton process to degrade the wastewater of the municipal slaughterhouse of Chota-Peru, which contains high organic load and are a constant danger of contamination of bodies of water and soil. The parameters evaluated were: Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), alkalinity, hardness, pH, conductivity, total solids, turbidity, temperature, oxidation-reduction potential (ORP) and dissolved oxygen (DO). A jar system with agitation at 30 r.p.m was used to treat the samples and different concentrations of FeSO4, H2O2 and pH according to the Box-Behnken design and calculating their values using the response surface methodology with Statgraphics 5.1 plus software. The most suitable reaction time was calculated at 18 minutes and concentrations of FeSO4, H2O2 and pH were estimated at 2110,55 mg/L, 1092,67 mg/L and 3,22 respectively. An improvement of the biodegradability indicator was observed at a value of 0,5 and a removal of the COD at around 79,9 %. The Fenton process turns out to be an effective alternative for the treatment of slaughterhouse wastewater and can be applied as a pre-treatment.