Industrial wastewater treatment in north gas company by using coagulation-flocculation process

الملخص EN

Recently, water pollution considered a major problem that faced the human.

Large quantities ofwater consume in various industrial oil refinery processes, where the wastewater dischargedfrom these processes contains high organic, phosphate, ammonia, nitrite compounds, and toxicsubstances.

Regarding that, making this resource a fresh is a major concern.

Furthermore, a great attention has been given for the removal of these contaminantsdischarged by Fenton process combined with coagulation process.

CombinedFenton/Coagulation process was used and applied in this study as a novel wastewater treatmentto remove Chemical Oxygen Demand (COD), Phosphate (PO4), Ammonia (NH3), Nitrite(NO3) compounds, and turbidity (NTU) from industrial wastewater in North Gas Company(NGC), Iraq.

The industrial wastewater used in this study was characterized with 114 mg/LCOD, 10.28 mg/L PO4, 4.123 mg/L NH3, 95.6 mg/L NO3, 98 NTU Turbidity.

The main goalfrom this work was to evaluate the performance removal efficiency of combinedFenton/Coagulation process and examine the effect of various operational parameters such asFenton's dosages (H2O2, Fe2+), the concentration of coagulant (Alum) on the removalefficiency.

The results obtained in this work revealed that maximum removal efficiency ofCOD, PO4, NH3, NO3, turbidity was 89.43% , 72.94 % , 91.065% , 90.96% , 89.85% , respectivelywas achieved using Fenton combined with coagulation process at 60 mg/L of Alum and 2.5Fenton's mole ratio.

Overall it can be established that Combined Fenton/Coagulation processplays an important role in obtaining good results and had better removal efficiency.

All theexperiments were carried out using jar test apparatus at constant temperature (roomtemperature).