DEVELOPMENT OF TREATMENT TRAIN BASED ON GREEN TECHNOLOGIES FOR REMOVAL AND RECOVERY OF NAPHTHENIC ACIDS FROM OIL-SAND PROCESS AFFECTED WASTEWATER

摘要

Jing Wan, Department of Chemical and Biochemical Engineering, University of Western Ontario, Canada Sreejon Das, Department of Chemical and Biochemical Engineering, University of Western Ontario, Canada Chunbao Xua, Department of Chemical and Biochemical Engineering, University of Western Ontario, Canada Madhumita B. Ray, Department of Chemical and Biochemical Engineering, University of Western Ontario, Canada Each day large volumes of oil sands process-affected water (OSPW) are being produced during the extraction of bitumen in oil sands industry in northern Alberta. OSPW contains different polyaromatic hydrocarbons (PAHs), bitumen, as well as naphthenic acids (NAs), which not only are the major source of toxicity in OSPW, but also create operational problems such as corrosion of the equipment during bitumen recovery process. A recent figure indicates that about 720 billion liters of OSPW that were produced during the extraction of bitumen from Canadian oil sands industry have been stored in tailing ponds that cover approximately 170 km~2. Water treatment and management strategies are urgently needed for OSPW recycling in order to reduce the withdrawal of fresh water from the Athabasca River and to permit the safe release of treated OSPW to the receiving environment by removing these compounds. OSPW is highly saline water with myriad of organic and inorganic constituents, including metals, anions, organic compounds, and suspended particles.