Asselin Mélanie, Drogui Patrick, Brar Satinder Kaur, Benmoussa Hamel, Blais Jean-François
Institut National de la Recherche Scientifique (INRS-Eau Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, Que., Canada G1K 9A9.
J Hazard Mater. 2008 Mar 1;151(2-3):446-55. doi: 10.1016/j.jhazmat.2007.06.008. Epub 2007 Jun 8.
This study investigated the treatment of oily bilgewater using an electrocoagulation technique. Electrocoagulation process was evaluated at laboratory scale (1.7 l electrolytic cell) and involved utilization of two kinds of electrodes (iron and aluminium) arranged either in bipolar (BP) or monopolar (MP) configuration. Results showed that the best performance was obtained using mild steel MP electrode system operated at a current intensity of 1.5A, through 60 or 90 min of treatment. Under these conditions, removal yields of 93.0+/-3.3% and 95.6+/-0.2% were measured for BOD and O&G, respectively, whereas CODs and CODt were removed by 61.3+/-3.6% and 78.1+/-0.1%, respectively. Likewise, 99.4+/-0.1% of n-C10 to n-C50 hydrocarbons was removed from oily bilgewater. Electrocoagulation was also efficient for clarification of OBW. Removal yields of 99.8+/-0.4% and 98.4+/-0.5% have been measured for TSS and turbidity, respectively. Electrocoagulation process operated under the optimal conditions involves a total cost of 0.46 US$ per cubic meter of treated OBW. This cost only includes energy and electrode consumptions, chemicals, and sludge disposal.
本研究调查了采用电凝聚技术处理含油舱底水的情况。在实验室规模（1.7升电解槽）下对电凝聚过程进行了评估，涉及使用两种电极（铁电极和铝电极），以双极（BP）或单极（MP）配置排列。结果表明，使用低碳钢MP电极系统，在1.5A电流强度下运行60或90分钟，可获得最佳性能。在这些条件下，测得生化需氧量（BOD）和油类与油脂（O&G）的去除率分别为93.0±3.3%和95.6±0.2%，而化学需氧量（CODs）和总化学需氧量（CODt）的去除率分别为61.3±3.6%和78.1±0.1%。同样，从含油舱底水中去除了99.4±0.1%的正癸烷至正五十烷烃。电凝聚对于含油舱底水的澄清也很有效。测得悬浮固体（TSS）和浊度的去除率分别为99.8±0.4%和98.4±0.5%。在最佳条件下运行的电凝聚过程处理每立方米含油舱底水的总成本为0.46美元。该成本仅包括能源、电极消耗、化学品和污泥处置费用。
