تصفيه فاضلاب مصنوعي حاوي پروپيلن گليكول در راكتور لجن فعال با بستر ثابت در مقياس آزمايشگاهي

Treatment of Synthetic Wastewater Containing Propylene Glycol by a Lab Scale Fixed Bed Activated Sludge Reactor

Propylene glycol is an organic compound which has wide applications in the pharmaceutical, cosmetics, chemical, and food processing industries. Propylene glycol is readily released into surface and ground waters and the neighboring soils via industrial wastewater effluents posing many health and environmental hazards. The main purpose of this study was to determine the efficiency of fixed bed activated sludge reactor for propylene glycol removal from synthetic wastewater. The lab scale reactor consisted of a cubic Plexiglas aeration tank with a total volume of 16 liters, 12 liters for aeration and 4 liters for settling. 25% of the aeration tank was filled with media as fixed bed for the biofilm to form. To evaluate the optimum efficiency of the reactor under variable