Evaluation the dairy wastewater treatment using electro - Generated fenton’s reagent Available to Purchase

Dairy wastewater main components are organic matters come from proteins and fats as well as lactose making biological treatment suitable choice. In contrast, water shortage and new discharge regulations push towards the needs for new technologies to reduce wastewater discharge and enhance treated water quality. Electric fenton processes as one of innovated advanced oxidation technology was investigated for treating dairy wastewater from Abo Greeb dairy factory – Baghdad. A 1.67 litter Perspex glass reactor was used. Moreover, cast iron plates used as cathode and anode in the reactor. Cast iron electrode was the source of ferrous (Fe²⁺) in reactor while hydrogen peroxide (H₂O₂) was added to the reactor. Various operation parameters were tested such as contact time, initial pH value, and initial concentration of hydrogen peroxide, current density and electrode spacing. Chemical oxygen demand (COD), Ammonium (NH₄), Phosphate (PO₄) were the parameter investigated for treatment suitability. Electric fenton was a suitable choice for the treatment of dairy wastewater. The optimum operation parameter during the experiments were measured at time 40 min, pH (3), 40 mA/cm² current density and 2000 mg/L of H₂O₂. Maximum removal for COD was 74%, NH₄ 28% and PO₄ 88%. Electrode spacing experiment show that increase spacing between electrodes results in increase removal efficiency. On the other hand, power consumption increased from 66 watt.hr/cm² to 422 watt.hr/cm².